虚拟条件句的基本类型与结构

虚拟条件句的基本类型与结构

一、与现在事实相反

若与现在事实相反，虚拟语气的条件从句的谓语用过去式(be通常用were)，主句谓语用“should (would, could, might)+动词原形”。如：

If you took a taxi，you'd get there quicker. 如果你坐出租车去，你可以快一点到那里。(但你不坐)

If I knew her number I could ring her up. 要是我知道她的电话号码，我就可以给她打电话了。(可惜我不知道)

二、与过去事实相反

若与过去事实相反，虚拟语气的条件从句的谓语用过去完成时(had+过去分词)，主句谓语用“should (would, could, might)+have+过去分词”。如：

If I'd left sooner，I'd have been on time. 要是我早点动身，我就准时到了。(但我动身太迟了)

If we had found him earlier we could have saved his life. 要是我们当时早点找到他的话，我们就可以救活他。(可惜我们找到他太晚了)

三、与将来事实相反

若与将来事实相反，条件从句的谓语用过去式(be通常用were)，主句谓语用“should (w ould, could, might)+动词原形”。如：

If he went，would you go too? 如果他去，你也去吗?(大概他不会去)

If I asked him，I'm sure he'd help us. 如果我向他提出要求，肯定他会帮助我们。(不过我不打算这样做)

注意与说明：对于与将来事实相反的情形，请注意以下几点：

一是这里说的与将来事实相反，实为对将来情况的推测；

二是此用法中的条件从句谓语除用过去式外，有时也用“should+动词原形”(表示可能性极小，常译为“万一”)或“were to+动词原形”(表示与将来事实相反的假设)；

三是当条件从句使用“should+动词原形”这样的谓语时，主句谓语除可用“should (w ould, could, might)+动词原形”这样的虚拟语气外，也可用陈述语气或祈使语气。如：

一、错综时间虚拟条件句

所谓错综时间虚拟条件句即条件从句与主句所指时间不一致，如从句指过去，而主句即指的是现在或将来，此时应根据具体的语境情况，结合上面提到的三种基本类型对时态作相应的调整。如：

If you’d listened to me, you wouldn't be in such trouble now. 如果你听了我的话，你现在也不会有这样的麻烦了。

二、含蓄虚拟条件句

所谓含蓄虚拟条件句即指将条件从句隐藏在上下文一定的短语中的一类条件句。如：To hear him talk，you'd think he was Prime Minister. 听他讲话你会以为他是首相。

Without your help，I couldn't have achieved all this. 要不是有你帮助，我不会取得这些成就。

三、连用虚拟语气的几个固定表达

有三个表示“若不是”、“要不是”的表达，它们总是连用虚拟语气，它们是but for, if it were not for, it it hadn’t been for。如(from https://www.wendangku.net/doc/2714610703.html,)：But for your help we would have been late. 幸亏你帮忙，要不我们就迟到了。

If it weren’t for water, no plant could grow. 要是没有水植物就无法生长。

If it hadn’t been for your help, we wouldn’t have succeeded. 要不是有你帮忙，我们是不会成功的。

四、虚拟语气的省略与倒装

有时可将条件从句的连词if 省略，而将从句中的were, should, had 等提到句首。如：Were it not for your help, I wouldn't be doing so well. 若不是你帮忙，我现在不会干得这样好。

Had I been there, I would have asked her the question. 如果我在那里，我就会问她这个问题

虚拟语气用法详解

一、条件句中的虚拟语气

1.条件句中虚拟语气的形式

从句中提出一种与客观现实不相符或根本不可能存在的条件，主句会产生的一种不可能获得的结果。条件句中的虚拟语气根据不同的时间有三种不同的形式。

3.运用条件句中的虚拟语气时，须注意的几个问题

(1) 当从句的主语为第三人称单数时，谓语动词若是系动词be时，可用was代替were。但在倒装虚拟结构及if I were you, as it were中，只能用were。如：

Were I ten years younger, I would study abroad. 要是我还年轻十岁的话，我会去国外学习。

(2) 有时，虚拟条件句中，主、从句的动作若不是同时发生时，须区别对待。

①从句的动作与过去事实相反，而主句的动作与现在或现在正在发生的事实不符。如：

If I had worked hard at school, I would be an engineer, too. 如果我在学校学习刻苦的话，我现在也会使工程师了

If they had informed us, we would not come here now. 如果他们通知过我们的话，我们现在就不会来这里了。

②从句的动作与现在事实相反，而主句的动作与过去事实不符。如：

If he were free today, we would have sent him to Beijing. 如果他今天有空的话，我们会已经派他去北京了(from https://www.wendangku.net/doc/2714610703.html,)。

If he knew her, he would have greeted her. 要是他认识她的话，他肯定会去问候她了。

③从句的动作与过去发生的情况相反，而主句的动作与现在正在发生的情况相反。如：

If it had not been raining too much, the crops would be growing much better. 如果天不下太多的雨的话，庄家会长得更好。

If he had been working hard, he would be working in the office now. 要是他工作一直努力的话，他现在已进了办公室了

(3) 当虚拟条件句的谓语动词含有were, should, had时，if可省略，而将were, should, had等词置于句首。如：

Should he agree to go there, we would send him there. 要是他答应去的话，我们就派他去。

Were she here, she would agree with us. 如果她在这儿的话，她会同意我们的。

Had he learnt about computers, we would have hired him to work here. 如果她懂一些电脑知识的话，我们会已经聘用他来这里工作了(from https://www.wendangku.net/doc/2714610703.html,)。

(4) 有时，句子没有直接给出假设情况的条件，而须通过上下文或其他方式来判断。如：

I would have come to see you, but I was too busy. 我本该来看你了，然而我太忙了。

But for his help, we would be working now. 要不是他的帮助，我们还会在工作呢。

Without your instruction, I would not have made such great progress. 要是没有你的指导，我不会取得如此大的进步。

(5) 有时，虚拟条件句中，主、从句可以省略其中的一个，来表示说话人的一种强烈的感情。

①省略从句

He would have finished it. 他本该完成了。

You could have passed this exam. 你应该会通过这次考试了。

②省略主句

If I were at home now. 要是我现在在家里该多好啊。

If only I had got it. 要是我得到它了该多好啊。

二、其他状语从句的虚拟语气

1.目的状语从句中的虚拟语气

(1) 在for fear that, in case, lest引导的目的状语从句中，若用虚拟语气时，从句谓语为：should + 动词原形。并且should不能省略

She examined the door again for fear that a thief should come in. 她又把门检查了一遍，以防盗贼的进入

2.让步状语从句中的虚拟语气

(1) 在even if, even though 所引导的让步状语从句中，可用虚拟语气，主句、从句的结构与if所引导的条件从句结构相同。如：

Even if he were here himself, he should not know what to do. 即使他亲自来也不知该怎么办。

(2) 在whatever，whichever，whenever，whoever, wherever，however, no matter wh-word 等引导的让步状语从句中，从句虚拟语气结构为：

①may +动词原形(指现在或将来)。如：

We will finish it on time no matter what / whatever may happen. 不管发生什么事，我们都要按时完成。

(3) 在though, although等引导的让步状语从句中，从句虚拟语气结构为should +动词原形，主句结构不限。如：

Although / Though he should often be late, he is a good student. 尽管他经常迟到，他还是个好学生。

Although / Though he should be secretary, he must obey the rules. 尽管他是书记，他也必须遵守规定。

3.方式状语从句中的虚拟语气

4.原因状语从句中的虚拟语气

amazed, angry, annoyed, astonished, disappointed, frightened, happy, pleased, proud, s orry, surprised, upset等后面的状语从句中常用虚拟语气。其虚拟语气的结构为：

①should + 原形动词(指现在或将来)。如：

He was angry that you should call him by name. 他很生气，你竟然对他直呼其名。

I was astonished that he should not answer such an easy question. 我很惊讶他竟答不出如此简单的问题。

②should + 完成式, 指过去。如：

I’m very sorry that you should have failed the exam. 我很遗憾，你这次考试竟然失败了。

I was very surprised that Father should have known what I did yesterday. 我很吃惊，父亲竟指导我昨天所作的事情

时态

时态是英语中一个重要的语法范畴，它表示不同时间发生的动作或存在的状态以及动作发生或存在的方式。动作发生的时间可分为现在、过去、将来和过去将来四种形式，动作发生的方式可1. 现在完成进行时的定义

现在完成进行时表分为一般、完成、进行和完成进行四种形式。将时间形式和动作方式结合起来，就构成了以下16种时态形式(以do为例)：

示某动作从过去某个时间开始，一直延续到现在，并且还有可能持续下去。如：

We have been waiting for him for two hours. 我们等他等了两个小时。

2. 现在完成进行时的结构

现在完成进行时由“have /has been + 现在分词”构成。

3. 现在完成进行时的应用

现在完成进行时所用的时间状语：this month / week / year, these days, recently / lat ely, in the past few + 时间段, since +时间点, for + 时间段。如：

They have been building the bridge for two month. 两个月来他们一直在修桥。

1. 过去完成时的定义

过去完成时既可表示过去某个时间或动作之前所发生的事情(常用时间状语有already, before, ever, just, never, still, yet)，也可表示过去某个时间或动作之前所发生的动作一直持续到过去某个时间(常接时间状语：since +时间点, for + 时间段)。如：

When I got to the station, the train had left. 当我到达车站时，火车已经开走了。

We had learnt fifteen lessons by last week. 到上周为止，我们学完了十五篇课文。

He had stayed here for two days before he left. 他走之前在这儿呆了两天。

He said that he had lived there since he was ten. 他说他十岁起就住在那儿了。

2. 过去完成时的结构

过去完成时由“had + 过去分词”构成。

3. 过去完成时的应用

(1)与过去完成时连用的时间状语可以多种多样，使用它的主要依据是看其是否发生在“过去的过去”。如：

He had learnt some English before I went here. 在来这儿之前我学过一些英语。

1. 现在完成时的定义

现在完成时既可表示过去发生的动作对现在所造成的结果或影响(此时通常连用的时间状语有already, yet, just, ever, before)，也可表示动作从过去某时间开始，一直持续到现在，并且还有可能持续下去(此时通常连用的时间状语有this month / week / year, these days, recently / lately, in the past few + 时间段, since +时间点, for + 时间段)。如：

I have just finished my work. 我把工作做完。

Have you ever been to Beijing? 你曾经去过北京吗？

I have lived for ten years. 我在这儿住了十年了。

We have studied here since 2003. 我们自2003年来就在这儿读书了。

2. 现在完成时的结构

现在完成时由“have / has + 过去分词”构成。

3. 现在完成时的应用

(1)非持续性动词go, come, leave, borrow, buy, die, join的完成时的肯定式不能与时间段连用，若要接用时间段状语，则应换成相应的持续动词或状态动词。如：

He has left. 他走了。(from https://www.wendangku.net/doc/2714610703.html,)

1. 过去进行时的定义

过去进行时主要表示过去某一时刻正在进行的动作，或表示过去某一阶段一直在进行的动作。如：

I was having a talk with Li Hua at that time. 那时，我正在跟李华谈话。

I was watching TV at home last night. 昨晚我一直在看电视。

2. 过去进行时的结构

过去进行时由“was / were + 现在分词”构成。如：

I was doing my lessons then. 那时，我在做功课。

We were cleaning the house. 我们在打扫房子。

3. 使用过去进行时应注意的几点

(1)过去进行时可表示按计划、安排过去某时刻将要发生的动作。如：

He said they were leaving for Beijing this afternoon. 他说他今天下午要去北京。

(2)动词hope, wonder等的过去进行时常用来表示提出要求，虽然表示现在的内容，但语气比一般现在时或一般过去时要委婉。如：

I was wondering whether you could come to join us. 我想你能否过来跟我们一起活动？

(3)过去进行时中有always, forever, continually, constantly修饰时，表示说话人的赞赏或厌烦的感情。如：

He was always thinking of others. 他总是想到人家。(

1. 现在进行时的定义

现在进行时主要用于表示目前正在进行的动作，有时也可表示现阶段在进行的动作。如：The teacher is giving us an English lesson. 老师正在给我们上英语课。

The farmers are getting in their crops. 农民们正在收割庄稼。

We are making preparations for the conference. 我们一直在为会议作准备。

2. 现在进行时的结构

现在进行时由“am / is / are + 现在分词”构成。如：

I’m studying at Yu Cai Senior Middle school. 我在育才中学读书。

He is writing on the desk. 他再课桌上写字。

They are talking about their visiting the Great Wall. 他们在谈论游长城的事情。

【说明】动词现在分词的构成方法：

(1)一般在动词后加-ing。如：say—saying, play—playing, think—thinking, study—stud ying, teach —teaching, blow—blowing, build—building.

(2)动词若以-e结尾, 则去e再加-ing。如：love—loving, make—making, guide—guidi ng, date—dating.

(3)在以单短元音的重读闭音节结尾，且末尾只有一个辅音字母的动词后，双写最后一个辅音字母，再加-ing。如：begin—beginning, regret—regretting, plan—planning, ban —b anning.

(4)在以ie结尾的动词后，改ie为y，再加-ing。如：lie—lying, die—dying, tie—tying.

(5)在以-c[k] 结尾的动词后加-king。如：picnic—picnicking, panic—panicking.

3. 现在进行时的应用

(1)表示目前正在发生或进行的动作。如：

They are planting trees on the mountain. 他们在山上植树。

Mother is preparing supper in the kitchen. 母亲在厨房做晚饭。

(2)有些非持续性动词的进行时可以表示动作即将进行或发生，或表示动作的重复。如：

He is joining the army. 他要参军了。

They are buying the house. 他们要买那座房子。

(3)当现在进行时中有always, forever, constantly, continually修饰时，表示说话人的赞赏或厌烦的感情。如:

Why is the baby always crying? 为什么那个老是在哭

1. 过去将来时的定义

过去将来时主要用于表示过去某个时候看来即将发生的动作或存在的状态。如：

He said he would come here next Friday. 他说他下周星期五来这儿。

I knew that he would help us when we were in trouble. 我知道当我们陷入困境时它会帮助我们。

2. 过去将来时的结构

(1)would + 动词原形。如：

She told us that she would try her best to catch up with other classmates this term. 她告诉我们说她将一切努力在本期赶上其他同学们。

When you asked Li Lei for help, he would never refuse you. 过去当你请她帮忙时，他绝不会拒绝。

(2)was / were going to + 动词原形。如：

He told us that he was going to attend the meeting. 他告诉我说他要参加那次会议。

He said that I was going to be sent to meet her at the railway station. 他说将要拍我去火车站接她

(3)was / were to + 动词原形。如：

The building was to be completed next month. 这座建筑改在下个月竣工。

Li Lei was to arrive soon. 李蕾很快就要到了。

(4)was / were about to + 动词原形。如：

We were about to leave there when it began to rain heavily and suddenly. 就在我们要离开时，天突然下起了大雨。

He was about to have lunch when the bell rang. 就在他要吃中饭的时候，门铃响起来了。

(5)was / were +现在分词。如：

He was leaving the next day. 他第二天要走了。(from https://www.wendangku.net/doc/2714610703.html,)

We were informed that the leaders were coming to our school soon. 我们接到通知说领导们很快要来我们学校。

3. 过去将来时的用法

(1)过去将来时，一般用于主句为过去时的宾语从句中。如：

He said he would stay with us. 他说他要与我们呆在一起。

He said he would never go there again. 他说他绝不会再去那儿。

(2)过去将来时，用于虚拟语气中，如：

If I were you, I would not do that. 要是我是你的话，我就不会那样做。

1. 一般过去时的定义

一般过去时表示过去某一时候或某一段时间所发生了的事情或存在的状态。常与过去时间yesterday, this morning, just now, a moment ago, in May, last night / year / week, onc e upon a time, the other day, before …, when –clause, in the past连用。如：

What did you do yesterday? 昨天你干了什么？

I met Lin Tao this morning. 今天上午我会到了林涛。

I was there a moment ago. 刚才我在那儿。

2. 一般过去时的应用

(1)表示过去某时所发生的动作或存在的状态。如：

Liu Ying was in America last year. 刘英去年在美国。

Jim rang you just now. 吉姆刚才给你打了电话。

(2)表示过去经常或反复发生的动作。常接时间副词often, usually, always, sometimes, every day / week, etc. 如：

We often went out for a walk after supper. 我们过去常在晚饭后散步。

We usually played together. 我们通常一起玩。(from https://www.wendangku.net/doc/2714610703.html,)

3. 一般过去时对谓语动词的要求

一般过去时的谓语动词要用动词的过去式。动词过去式的构成分规则变化和不规则变化两种形式，不规则变化通常需要逐个记忆，规则变化则遵循以下原则：

(1)一般在动词后加-ed。如：play—played, offer—offered, weigh—weighed, destroy—destroyed, sign—signed.

(2)在以字母e结尾的动词后，只加-d。如：like—liked, provide—provided, hate —ha ted, date—dated。

(3)在以“辅音字母+y”结尾的动词后，则改y为i，再加—ed。如：supply—supplied, fl y—flied, study—studied. (from https://www.wendangku.net/doc/2714610703.html,)

(4)在以单短元音的重读闭音节结尾且，末尾只有一个辅音字母的动词后，双写最后一个辅音字母，再加-ed。如：plan—planned, refer—referred, regret—regretted, ban—banned.

1. 过去将来时的定义

过去将来时主要用于表示过去某个时候看来即将发生的动作或存在的状态。如：

He said he would come here next Friday. 他说他下周星期五来这儿。

I knew that he would help us when we were in trouble. 我知道当我们陷入困境时它会帮助我们。

2. 过去将来时的结构

(1)would + 动词原形。如：

She told us that she would try her best to catch up with other classmates this term. 她告诉我们说她将一切努力在本期赶上其他同学们。

When you asked Li Lei for help, he would never refuse you. 过去当你请她帮忙时，他绝不会拒绝。

2. 过去将来时的结构

(1)would + 动词原形。如：

He told us that he was going to attend the meeting. 他告诉我说他要参加那次会议。

He said that I was going to be sent to meet her at the railway station. 他说将要拍我去火车站接她

(3)was / were to + 动词原形。如：

The building was to be completed next month. 这座建筑改在下个月竣工。

Li Lei was to arrive soon. 李蕾很快就要到了。

(4)was / were about to + 动词原形。如：

We were about to leave there when it began to rain heavily and suddenly. 就在我们要离开时，天突然下起了大雨。

He was about to have lunch when the bell rang. 就在他要吃中饭的时候，门铃响起来了。

(5)was / were +现在分词。如：

He was leaving the next day. 他第二天要走了。(from https://www.wendangku.net/doc/2714610703.html,)

We were informed that the leaders were coming to our school soon. 我们接到通知说领导们很快要来我们学校。

3. 过去将来时的用法

(1)过去将来时，一般用于主句为过去时的宾语从句中。如：

He said he would stay with us. 他说他要与我们呆在一起。

He said he would never go there again. 他说他绝不会再去那儿。

(2)过去将来时，用于虚拟语气中，如：

If I were you, I would not do that. 要是我是你的话，我就不会那样做。

1. 一般过去时的定义

一般过去时表示过去某一时候或某一段时间所发生了的事情或存在的状态。常与过去时间yesterday, this morning, just now, a moment ago, in May, last night / year / week, onc e upon a time, the other day, before …, when –clause, in the past连用。如：

What did you do yesterday? 昨天你干了什么？

I met Lin Tao this morning. 今天上午我会到了林涛。

I was there a moment ago. 刚才我在那儿。

2. 一般过去时的应用

(1)表示过去某时所发生的动作或存在的状态。如：

Liu Ying was in America last year. 刘英去年在美国。

Jim rang you just now. 吉姆刚才给你打了电话。

(2)表示过去经常或反复发生的动作。常接时间副词often, usually, always, sometimes, every day / week, etc. 如：

We often went out for a walk after supper. 我们过去常在晚饭后散步。

We usually played together. 我们通常一起玩。(from https://www.wendangku.net/doc/2714610703.html,)

3. 一般过去时对谓语动词的要求

一般过去时的谓语动词要用动词的过去式。动词过去式的构成分规则变化和不规则变化两种形式，不规则变化通常需要逐个记忆，规则变化则遵循以下原则：

(1)一般在动词后加-ed。如：play—played, offer—offered, weigh—weighed, destroy—destroyed, sign—signed.

(2)在以字母e结尾的动词后，只加-d。如：like—liked, provide—provided, hate —ha ted, date—dated。

(3)在以“辅音字母+y”结尾的动词后，则改y为i，再加—ed。如：supply—supplied, fl y—flied, study—studied. (from https://www.wendangku.net/doc/2714610703.html,)

(4)在以单短元音的重读闭音节结尾且，末尾只有一个辅音字母的动词后，双写最后一个辅音字母，再加-ed。如：plan—planned, refer—referred, regret—regretted, ban—banned.

1. 一般将来时的定义

一般将来时表示在现在看来即将要发生的动作或存在的状态。常用时间副词tomorrow, soon或短语next year / week / month, in a few days, in the future, sometime 做状语。如：What will you do this afternoon. 你今天下午干什么？

We will have a meeting tomorrow. 我们明天要开会。

He is going to study abroad next year. 明年他要出国学习。

2. 一般将来时的结构及应用

(1)shall / will + 动词原形。表示即将发生的动作或存在的状态。特别是表示客观性的事情或在某条件下要发生的事情，只能用此结构。如：

What shall we do if he doesn’t come? 如果他不来，我们该怎么办？

Will you be free this evening? 今天晚上有空吗？

I think he will tell us the truth. 我想他会告诉我们真实情况的。(from www.yygramma https://www.wendangku.net/doc/2714610703.html,)

(2)be going to + 动词原形。表示已经计划或安排好了的事情，也可表示有迹象表明肯定要发生的事情。如：

We are going to have a meeting to discuss the matter this evening. 今天晚上开会讨论这件事情。

Look at the black clouds over there. I think it is going to rain soon. 看一看那边的乌云，我想天要下雨了。

There is going to be an English evening this week. 本周要举行一个英语晚会。

(3)be to + 动词原形。表示一种常规性的活动或注定要做的事情。如：

Who is to clean the classroom today? 今天该谁打扫教室了？

When are you to return your library book? 你什么时候要还图书？

The bridge is to be completed by the end of this year. 这渡桥该在今年年底前完工。

(4)be about to + 动词原形。表示就要做或正好要做的事情。往往暗含一种时间上的巧合，因此，句子不能再用时间状语。如：

Don’t leave. Li Lei is about to come. 不要走了，李蕾就要来了。

Be quiet. The concert is about to start. 安静下来，音乐演唱会就要开始了。

(5)be +现在分词。表示即将发生的动作或存在的状态。这个句型中动词主要是瞬间动词：come, go, leave, arrive, begin, start, stop, close, open, die, join, borrow, buy等。如：Go ahead, and I’m coming. 走前面一点吧，我就来。

The dog is dying. 那条狗要死了。

Hurry up. The shop is closing. 快点，商店就要关门了。

(6)一般现在时。表示一种严格按照计划进行的动作。比方说，上课、飞机起飞、火车离站等。如：

Don’t hurry. The meeting starts at a quarter past eight. 不要匆忙，回忆八点过一刻开始。

倒装

1. 否定副词位于句首时的倒装

在正式文体中，never, seldom, rarely, little, hardly, scarcely, no sooner, no longer, no where 等含有否定意义的副词若位于句首，则其后要用部分倒装：

I shall never forgive him. / Never shall I forgive him. 我永远不会宽恕他。

He seldom goes out for dinner. / Seldom does he go out for dinner. 他很少出去吃饭。

2.“only+状语”位于句首时的倒装

当一个状语受副词only的修饰且置于句首时，其后用部分倒装语序：

Only then did he realize that he was wrong. 到那时他才意识到他错了

3. “so+adj. / adv.”位于句首时的倒装

副词so后接形容词或副词位于句首时，其后用部分倒装：

So cold was the weather that we had to stay at home. 天气太冷，我们只好呆在家里

4.“so+助动词+主语”倒装

当要表示前面提出的某一肯定的情况也同样适合于后者，通常就要用“So+助动词+主语”这种倒装结构：

You are young and so am I. 你年轻，我也年轻。

5. 由not only…but also引出的倒装

当not only…but also位于句首引出句子时，not only 后的句子通常用部分倒装形式：Not only is he a teacher, but he is also a poet. 他不仅是一位教师，而且是一位诗人当if引导的虚拟条件从句中含有had, were, should等时，如将if省略，则要将had, we re, should等移到主语前，构成倒装句：

Had you come yesterday, you would have seen him.若你昨天来，你就会见到他了。

英语部分倒装大归纳

1.疑问句中，一般须部分倒装。如：

How long have you been here? 你来这儿多长时间了？

2.否定词no, none, neither, nor, nobody, nothing, never，或半否定词hardly, seldom, scarcely, barely, little, few, 否定词的短语not until, by no means, not only…but also…, in no way, neither …nor…, in no time, no sooner…than…, hardly…when…, 及频度状语副词every day, every other day, many a time, often等位于句首时，一般须部分倒装。如：

Neither do I know him. 我也不认识他。

No word did he say before he left. 他一句话没说就走了。

3.Only + 状语，置于句首时，一般须用部分倒装。如：

Only when I got there did I know the truth. 我只有到那里时才知道事情的真相。

4.as / though引导让步状语从句时，一般须用部分倒装。如：

Old as / though he is, he works like a young man. 尽管他很老了，但他工作起来却像个年轻人。

5.may用来表示祝愿时，一般用部分倒装。如：

May you have a good journey. 祝你旅途愉快。

6.当虚拟条件句的谓语含有were, had, should时，可将if省略，而将were, had, shoul d提到句首，形成部分倒装。如：

Were he here, we would have no difficulty with it. 要是他在这儿的话，我们就不会有难处了。

7.当so 用来连接不同的人或物具有相同的情况时，可用部分倒装。如：

—Tom can speak Chinese. 汤姆会讲汉语。

—So can Mary. 玛丽也会讲汉语。

8.结构so…that…/ such…that…引导状语从句，当so或such提到句首时，主句须用倒装语序。如：

So interesting is that story that everyone wants to read it. 那个故事那么有趣，大家都想看。

9.感叹句中的倒装。如：

Isn’t it beautiful! 难道还不漂亮！

Aren’t you content with it! 难道还不知足！

有时为了强调，可将谓语部分的现在分词、过去分词或不定式置于句首，从而构成倒装。如：

Buried in the sands was an ancient village. 一个古老的村庄被埋在这沙土之中。

Standing beside the table was his wife. 站在桌旁的是他的妻子。

as作“虽然”解，引导让步状语从句时，必须将表语、状语或动词原形提到as前面。此时应注意几点：一是若提前的表语是没有形容词修饰的单数可数名词，要省略不定冠词；

二是若提前的是动词原形(多为不及物动词)，与之连用的通常是may, might, will, would等，且这些词都要保留在原来的位置上(主语后)；三是though有时也可像as这样使作倒装。如：Tired as I was, I tried to help them. 虽然我很累，我还是努力帮助他们。

Try as he would, he couldn’t open the door. 他试过多次了, 却仍打不开那门。

Search as they would, they would find nobody in the house. 无论怎样搜查，他们在房子里仍然没有找到一个人。

有时为了强调，可将谓语部分的现在分词、过去分词或不定式置于句首，从而构成倒装。如：

1. 现在分词置于句首时引出的倒装

Lying on the couch is an old lady. 躺在睡椅上的是一位老太太。

Standing beside the table was his wife. 站在桌旁的是他的妻子。

Leading to the park is a very delightful road. 通向公园去的是一条非常宜人的路。

2. 过去分词置于句首时引出的倒装

Buried in the sands was an ancient village. 一个古老的村庄被埋在这沙土之中。

有时置于句首的过去分词可能已转化为形容词，为句子的表语。如：

Seated on the grass are some students singing and laughing. 一些学生坐在草地上，唱着、笑着。

Gone are the days when they could to what they liked to the Chinese people. 他们

能够对中国人民为所欲为的日子一去不复返了。

3. 不定式置于句首时引出的倒装

To be carefully considered are the following questions. 下列问题要仔细考虑。

虚拟语气中的含蓄条件句常见用法总结

虚拟语气中的含蓄条件句常见用法 先看一道高考题： ____ more attention，the trees could have grown better． A．Given B．To give C．Giving D．Having given （答案是A） 句中"．．．the trees could have grown better"是一个表达虚拟语气的句子。题中要求选择的是如何表达假设条件的形式。如果我们把这个句子用另一种形式"If they had been given more attentio n ，the trees could have grown better．"来表示，就不难理解了。很多情况下，在表示假设的虚拟语气中，有时假设的条件并不以条件从句的形式表达，而是通过上下文或句中内在的逻辑关系，或用其它形式表达出来，我们称之为"含蓄条件句"。 含蓄条件句主要通过名词、连接词、不定式、分词、动名词短语、介词短语及分句来暗示。这些表达形式在句中实际起着虚拟条件从句的作用。现分述如下： 一、介词短语 常用来表示虚拟条件的介词有with，without，in，under，but for等等，它们表示的虚拟条件都可以被if从句替换。 （1）without，with without表示否定的条件，意为if．．．not；with与without意义相反，表示肯定的条件。如：Without air，there would be no living things．（without air ＝if there were no air）没有空气，便没有生物。 With her help（＝If I had her help），I would do the experiment well．假如有她帮助，我就可以把这个实验做好。 （2）under Under the leadership of a less experienced person，the experiment would have failed．（u nder．．．＝If there had been the leadership of a less experienced person）假设在一个缺少经验的人领导下进行实验，实验准会失败。 （3）in I would have lost my head in that position．（in that position ＝if I had been in that po sition）我处在那种情况下，是会丧失理智的。 （4）but for

if条件句中的虚拟语气讲解

虚拟语气(一) 一、考点聚焦 1、虚拟语气用于条件状语从句中 If I were a boy, I would join the army. If she had time, she should go with you. If h e had taken my advice, he would have succeeded in the competition. If i t were to rain tomorrow, the football match would be put off. If I had time, I would attend the meeting. If he had hurried ,he could have caught the train. If I were to go abroad ,I would go to America 如果我是你，我就会努力学习 If I were you, I would work harder at my lessons. 如果我知道他的电话号码，我就给他打电话了 If I had known his telephone number, I would have called him. 如果明天下雨的话，我们会取消比赛． If it should \were to rain, we would call off the match.

使用虚拟条件句要注意的几点： １．当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时，被称为：错综时间条件句“，动词的形式要根据它所表示的时间作出相应的调整． If you had followed my advice , you would be better now. 如果你听我的建议，你现在就会痊愈了． If you had studied hard before, you would be a college student now. 如果你努力学习的话，你现在就会是大学生了． If they had worked hard, they would be very tired now.(从句说的是过去，主句指的是现在) ２．省略句 在条件句中，可省略if，把were ,had, should 提到句首，变为倒装句式．If I were at school again, I would study harder. Were I at school again, I would study harder. If you had come earlier, you would have met him. Had you come earlier, you would have met him. If it should rain tomorrow, we would not go climbing. Should it rain tomorrow, we would not go climbing. Were I a boy, I would join the army. Had he taken my advice, he would have succeeded. Were it not for the expense, I would go to Britain. 2、虚拟语气用于名词性从句 （1）虚拟语气在宾语从句中的运用。 ①“wish + 宾语从句”表示不能实现的愿望，译为“要是……就好了”等。 表现在过去时 表过去过去完成时 表将来would, might, could＋动词原形 I wish it were spring all the year round. I wish I had known the answer. I wish I could fly like a bird. I wish (that) I were a bird. I wish (that) I had seen the film last night. I wish (that) I would\could go.

If条件句和虚拟语气

If条件句和虚拟语气 if 条件句和虚拟语气 包含条件从句的句子叫条件句。条件句有两类：一类是真实条件句（First conditional）,一类是非真实条件句(Second Conditional)。如果假设的情况是有可能发生的，就是真实条件句；如果是纯属假设情况或是不可能发生或可能性不大的情况，则是非真实条件句。 1.真实条件句,可用if和unless引导 1）一个动作发生，另一动作随之发生 I’ll lend Peter the money if he needs it. If he has time, he will come. If he doesn’t come before 12 o’clock, we won’t wait for him. I shall go tomorrow unless it rains. I won’t go to her party unless I am invited. 2）表示命令、建议或请求,这时的if等于when If she telephones, let me know. Give my love to Lawrence if you see him. 3)will用于if从句中，不表示将来，而表示愿意或坚持的意思 If you will come this way, I’ll take you to the manager’s office. If you will get drunk every night, it’s not surprising you feel ill. 2. 非真实条件句

非真实条件句包括虚拟条件句和错综时间条件句 1）虚拟条件句分三类，其结构列表如下： If I become president, I’ll make all of my people live a happy life. (竞选总统的候选人这样说) If I became president, I’d make all of my people live a happy life. (一个小学生这样说) l 以下与现在事实相反 He wouldn’t feel so cold if he were indoors. I am sorry I am very busy just now. If I hade time, I would certainly go to the movie with you. l 以下与过去事实相反 If you had come here a little earlier, you would have met the pop star. I don’t know what would have happened if Jane hadn’t been able to speak Japanese. l 以下推测将来 If I were to do the work, I should do it in a different way. If it should rain again, what else could we do? 2) 错综时间条件句

if引导的条件句中的虚拟语气

if引导的条件句中的虚拟语气 虚拟语气表示一种不能实现的假设。该语法主要用于if条件状语从句。 一、if引导的条件状语从句的分类及虚拟条件句的判断 1、可以把条件句分为两类： 1).真实条件句（Sentences of Real Condition）：凡是假设的情况发生性可能很大，就是真实条件句。例如： ⑴、If I have time , I will help you with this work.如果我有时间会帮助你做此工作的。 (2)、If time permits, we'll go fishing together.(如果有时间的话，我们就一起去钓鱼。） 2).虚拟条件句（Sentences of Unreal Condition）：当假设是不大可能实现时，就是虚拟条件句。例如： ⑴、If I were you , I would have attended the meeting. 如果我是你的话，就去参加会议了。 ⑵、If he had come here yesterday, he would have seen h is old friend.假如他昨天来这儿的话，就会看见他的老朋友。 ⑴、If it had rained yesterday, we would have stayed at home.（如果昨天下雨的话，我们就会留在家里。） 2、.if条件状语从句中虚拟语气的判断 判断是真实条件句还是非真实条件句。只有在非真实条件句中才使用虚拟语气。通过句子意思，看假设的条件是否能够实现，能

够实现是真实条件句，不能使用虚拟语气；假设的条件不能实现则是非真实条件句，要用虚拟语气。 判断这个假设是与哪个事实相反。通常有三种情况：①与过去事实相反。②与现在事实相反。③与将来事实可能相反。 3、“后退一步法” 后退一步法是指在准确地判断了该句与哪一事实相反后，按虚拟语气的后退一步法处理从句谓语动词的时态。即：在非真实条件状语从句中，谓语动词按正常情况“后退一步”。也就是： ①与过去事实相反，在从句中用过去完成时形式表示。 ②与现在事实相反，在从句中用过去一般时形式表示。 ③与将来事实可能相反，在从句中用过去将来时形式表示。 主句中则用情态动词would, should, could 等加一个与从句一致的动词形式。例： ⑴、If I had come her yesterday, I would have seen him. ⑵、If I were a teacher, I would be strict with my stud ents. ⑶、If it should snow tomorrow, they couldn't go out. 4、注意事项 ①if条件句中如有were, should, had，可以省去if，并使用倒装语序。 ②在现代英语中if条件状与从句中的谓语动词如果是be其过去形式一般用were。

if条件状语从句中虚拟语气

if条件状语从句中的虚拟语气 一、if条件状语从句中虚拟语气的判断判断是真实条件句还是非真实条件句。 只有在非真实条件句中才使用虚拟语气。通过句子意思，看假设的条件是否能够实现， 能够实现是真实条件句，不能使用虚拟语气； 假设的条件不能实现则是非真实条件句，要用虚拟语气。 1. “后退一步法”后退一步法是指在准确地判断了该句与哪一事实相反后，按虚拟语气的后退一步法处理从句谓语动词的时态。即：在非真实条件状语从句中，谓语动词按正常情况“后退一步”。也就是： ①与过去事实相反，在从句中用过去完成时形式表示。 ②与现在事实相反，在从句中用过去一般时形式表示。 ③与将来事实可能相反，在从句中用过去将来时形式表示。主句中则用情态动词would, should, could 等加一个与从句一致的动词形式。 例：⑴、If I had come her yesterday, I would have seen him. ⑵、If I were a teacher, I would be strict with my students. ⑶、If it should snow tomorrow, they couldn't go out. 2、注意事项： ①if条件句中如有were, should, had，可以省去if，并使用倒装语序。 ②在现代英语中if条件状与从句中的谓语动词如果是be其过去形式一般用were。 二、虚拟语气在if 引导的条件句中的用法： 1. If it weren’t for your help, we would get into trouble. 如果没有你们的帮助，我们就会陷入困境。（而事实上得到了你们的帮助） 2.If the weather were fine, I would go there. 如果天气好，我去那儿。（事实天气不好） 3.If I were you, I would read it again. 如果我是你的话，我再读一遍。（事实上我不是你） 4.If time permitted, I would write it again. 如果时间允许的话，我再写一遍。（事实上时间不允许） 5.If it weren’t snowing, we wouldn’t stay in the house. 要是现在不下雪的话，我们就不会待在屋里。（事实上现在下雪） 6.What would I do if I were in your place?要是我处于你地位我会怎么办？（事实上我不在你的位置上） 7.If he hurried, he could catch the first bus. 他要是快点能够赶上头班公共汽车。（可是他不着急） 8. If I were you, I should buy it. (从句用过去式动词were，主句用动词原形buy) 9. If I had time, I would study French. (如果有时间，我会学习法文。)（从句用过去式动词had，主句用动词原形study） 10. If she knew English, she would not ask me for help. (如果她懂英文，她就不必要我帮了。)(从句用过去式动词knew, 主句用动词原形ask) 注意：如果动作在进行中，主句要用："主语+ would be + 进行式动词+ ……" 14. If they were here, he would be speaking to them now. (从句用过去式动词were, 主句用would be speaking)

if引导的虚拟条件句(20200509141756)

Subjunctive Mood Ⅰ. Listen to the songs and fill in the blanks Number one: If _______________, _____________so high That the only people near me Would be the pilots in the sky. And If _______________, _______ so gracefully Through the air so all mankind could see. If _______________ Number two: If ______________I'd never hear your voice again, ___________each thing you ever said And on those lonely nights I could think of them once more And keep your words alive inside my head If _______________I'd never hear your voice again Number three: If I ______________, I _______________ in your way So I'll go, but I know I'll think of you every step of the way And I will always love you I will always love you Number four: yeah if ___________, then money, fame and fortune never _____________ If ____________, _____________a party( it'd be ecstasy(狂喜)) yeah if __________ you y-y-y-y do y-y-y-y-y do y-y-y-y-y do If _____________ that would be the only thing I'd ever need Subjunctive mood is used to talk about situations that are ______ true or _____ likely to become true. Ⅱ Observe the following sentences and put them into throw groups 1.If it were Sunday tomorrow, I would go and see my friends. 2. If she hadn't called me, I could have overslept(睡过头) this morning. 3. If he were you, I might go and try. 4. If I had time right now, I should certainly help you. 5. If I had known your telephone number yesterday, I would have telephoned you. 6. If it should rain in the near future, the crops could be saved. 7. If he were here tomorrow, I should speak to him. 8. If we had no air and water, we wouldn't survive. 9. If it snowed tomorrow, I might stay at home. 10. If you were to be a millionaire soon, what would you do with your money? Contrary to the present:__________________ Contrary to the past:_____________________ Contrary to the future:___________________ Ⅲ Structures of subjunctive mood 1. 虚拟条件从句主句 与现在事实 相反的假设If+S+________________ S+_____________________ 与过去事实 相反的假设If+S+ ________________ S+_____________________ 与将来事实 相反的假设 _______________ If+ S+ _______________ _______________ S+_____________________ 2. If 的省略:________________________________________________ 3. 错综条件句:______________________________________________ 1)If you had followed my advice the other day, you would feel better now.

高考if条件句虚拟语气

高考虚拟语气试题 1. ____ to the doctor right away, he might have been alive. A. If he went B. Were he gone C. Should he have gone D. Had he gone 2. If you were older, I ____ you to go there yesterday. A. will allow B. should allow C. would have allowed D. had allowed 3. If we ____ here ten minutes earlier, we ___ the bus. A. arrived/would catch B. arrived/would have caught C. had arrived/had caught D. had arrived/would have caught 4. If I ___ more time, I would have gone with him. A. had B. had had C. have had D. would have 5. If he had not gone out in the storm _____. A. he will be alive now B. he would be alive now C. he would have been alive now 6. If it ___ tomorrow, what would we do? A. rains B. were to rain C. would rain D. rain 7. If only I _____ how to operate an electronic computer as you do. A. had known B. would know C. should k now D. knew 8. If it ___ rain, we ___ get wet. A. is to, should B. were to, would C. were going to, would D. was going to, should 9. If he ___ to the teacher attentively, he ___ the answer to the problem now. A. had lis tened, would have known B. listened, would know C. listened, would have known D. had listened, would know 10. ---- I thought you would come back tomorrow. ---- I would if I ___ to attend a meeting. A. don’t have B. didn’t have C. will not have D. would not have 11. If I had hurried, I ___ the train. A. would catch B. could catch C. would have caught D. had caught 12. If I had known that, I ___ so. A. wouldn’t do B. wouldn’t have done C. won’t do D. have not done 13. If I ___ you, I wouldn’t return the call. A. be B. am C. was D. we re 14. If the doctor had been available, the child ___. 教育是一项良心工程 1

if可以引导真实条件句和虚拟条件句

Unit 4 一. if 条件句 if可以引导真实条件句和虚拟条件句。真实条件句表示在假设的条件下，能够实现的情况。在这种情况下，主句和从句的谓语动语随各自的人称和时态发生变化，同时if条件句遵循“主将从现”的原则，即主句用一般将来时，从句用一般现在时表将来。 If it doesn’t rain tomorrow, we will go for a picnic. 如果明天不下雨，我们去野餐。 如果if条件句用来描述说话人认为与事实相反的内容，或仅是一种愿望，假设、猜测等，我们称为虚拟条件句。 If I got rich , I would travel around the world. 如果我有钱了，我将周游全世界。 1. —I often get nervous when I have an English class. What should I do?

—If I were you, I . (ask the English teacher for help) 2. —What would the earth be like if there ?(is no air or water on it) —It could be like the moon without any living things. 3. If it ,the crops would be saved. (is to rain tomorrow) 4. If we had found him earlier, we .(solve the problem more easily) 5. If I hadn’t been so busy, I .(take part in the party) 四、单选。 ( )1. If my father here now, he tell me what to do. A. were, would B. were, will C. is would D. is will ( )2. If I a bee, I work much harder. A. were, would B. were, shall C. had, will D. have, should ( )3. If I much money, I buy a house. A. have, will B. had, would C. had, will D. have, should ( )4. He learn more quickly if he harder. A. will, work B. would , worked C. would, work D. will, worked ( )5. If I you, I do that. A. was, wouldn’t were, wouldn’t C. am, won’t D. were, won’t ( )6. It’s quite impossible that it will rain tomorrow. But if it ,I would still go to the park. A. should rains B. would rain C. rained D. had rained 五、汉泽英 1. 如果我是你，我会帮助她。If I you, I her. 2. 如果我以前去过那个地方，我就认识路了。（和相反） If I to the place before, I the way. 3. 万一你明天迟到了，我们就不等你了。（和相反） If you tomorrow, we for you.=If you late tomorrow, we for you. 4. 如果没有空气，地球上就不存在生物。 If there no air, there no living things.

if引导的条件句中的虚拟语气

iｆ引导的条件句中的虚拟语气?虚拟语气表示一种不能实现的 假设。该语法主要用于if条件状语从句。?一、ｉｆ引导的条件状语从句的分类及虚拟条件句的判断 1、可以把条件句分为两类： 1)．真实条件句（Sentences of Real Coｎdition）：凡是假设的情况发生性可能很大,就是真实条件句。例如:?⑴、If I ｈaｖe timｅ, I wｉll help yｏｕwith ｔhisｗork.如果我有时间会帮助你做此工作的。 (２)、Iｆtimｅperｍiｔs，ｗｅ＇ll go fishｉng tｏgetheｒ. (如果有时间的话，我们就一起去钓鱼。) 2).虚拟条件句（Seｎtｅnces of UnrｅaｌCoｎditiｏn):当假设是不大可能实现时，就是虚拟条件句。例如: ⑴、ＩfＩｗｅrｅyou ,I woｕｌd haｖe ａttenｄｅd th e meｅtiｎｇ．如果我是你的话，就去参加会议了。?⑵、I f ｈe had come ｈeｒe yesterday, ｈｅwouｌd haｖe sｅen ｈis ｏlｄfriｅnd.假如他昨天来这儿的话,就会看见他的老朋友。?⑴、If iｔｈaｄrained yｅsｔerday, we would hａve stayｅｄaｔｈｏme．(如果昨天下雨的话,我们就会留在家里。)?２、．ｉf条件状语从句中虚拟语气的判断?判断是真实条件句还是非真实条件句。只有在非真实条件句中才使用虚拟语气。通过句子意思，看假设的条件是否能够实现，能够实现是真实条件句，不能使用虚拟语气；假设的条件不能实现则是非真实条件句，要

用虚拟语气。?判断这个假设是与哪个事实相反。通常有三种情况:①与过去事实相反。②与现在事实相反。③与将来事实可能相反。 3、“后退一步法”?后退一步法是指在准确地判断了该句与哪一事实相反后，按虚拟语气的后退一步法处理从句谓语动词的时态。即：在非真实条件状语从句中,谓语动词按正常情况“后退一步”。也就是:?①与过去事实相反，在从句中用过去完成时形式表示。 ②与现在事实相反，在从句中用过去一般时形式表示。 ③与将来事实可能相反，在从句中用过去将来时形式表示。?主句中则用情态动词wｏuld, sｈouｌd, coulｄ等加一个与从句 一致的动词形式。例： ⑴、Ｉf I had coｍe ｈeｒyestｅrdａy，Ｉｗoｕlｄhave seen hiｍ. ⑵、Ｉf Ｉwｅｒe a teaｃhｅr, I ｗｏｕｌd bｅｓtrｉct wｉth my studenｔｓ. ⑶、Ｉｆit ｓhouｌd snow ｔomorｒow,ｔheｙcoulｄn't g o out. 4、注意事项?①iｆ条件句中如有ｗere，should, haｄ,可以省去if，并使用倒装语序。?②在现代英语中ｉｆ条件状与从句中的谓语动词如果是be其过去形式一般用wｅrｅ。 二、虚拟语气在ｉf 引导的条件句中的用法:?(一）、表示与现在事实相反的情况。其句子结构为：?从句:if + 主语+动词的过

必修2 If真实条件句与虚拟条件句

If真实条件句与虚拟条件句 真实条件句与虚拟条件句 1.真实条件句 真实条件句是指主句中的某一动作或状态是在真实情况下或有可能实现的情形下发生的。在表示真实条件句的复合句中，表条件的状语从句和表结果的主句的谓语都用陈述语气。 * If you come back late, your mother will worry about you. 如果你回来晚了，你妈妈会担心的。（if引导真实条件句，主句用一般将来时，从句用一般现在时表将来） * If your suggestion is rejected, they will let you know. 如果你的建议遭到拒绝，他们会让你知道的。（if引导真实条件句，主句用一般将来时，从句用一般现在时表将来） 2.虚拟条件句 （1）虚拟条件句指的是与事实相反或不太可能实现的事。在表示非真实条件的复合句中，表示条件的状语从句和表示结果的主语的谓语动词要用虚拟语气。

* If I were you, I would focus my attention on looking after my elderly parents. 如果我是你，我会把注意力集中在照顾年迈的父母上。（if引导虚拟条件句，叙述与现在事实相反，主句谓语动词用would do,从句谓语动词用过去式，be用were） * If he had got up a little earier, he wouldn’t have been late. 如果他早一点起床，他就不会迟到了。（if引导虚拟条件句，叙述与过去事实相反，主句用谓语动词would have done,从句谓语动词用had done） * If he should come(were to come/came)tomorrow, I would treat him to dinner. 如果他明天来，我就请他吃饭。（if引导虚拟条件句，叙述与将来事实相反，主句谓语动词用would do,从句谓语动词有三种形式：should do, were to do, 过去式） 当条件状语从句表示的动作与主句表示的动作发生的时间不一致时，动词的形式要根据它所表示的时间来调整，这种虚拟条件句称之为错综复杂虚拟条件句。往往是主句叙述与现在事实相反，谓语动词用would/should/might/could do,而从句叙述与过去事实相反，

虚拟条件句练习题附答案

虚拟条件句 在英语中，语气是动词的一种形式，用来表示说话人的意图或态度。 英语的语气有三种：_____语气（表示所说的话是事实）， _____语气（表示所说的话是请求或命令） _____语气（表示所说的话只是一种主观的愿望或假设或建议等）。 如果所表示的条件是真实的，或者完全有可能实现的，叫真实条件句，主句和从句的谓语都用陈述语气。如果所表示的条件不可能实现或者实现的可能性很小时，叫非真实条件句，主句和从句的谓语要用虚拟语气。 （ 练习： 1.If I _____(be) you, I __________(tell) them the truth. 如果我是你的话，我就会把真相告诉他们。 2.If I_____(get) the information, I__________(let) you know first. 如果我知道这个情况的话，我会第一个告诉你。 3.If we__________(have) enough money, we _______________(buy)the house. 如果我们有足够的钱的话，我们就买下那座房子了。 4.If she ______________(come), what _______________(say) to her? 万一她来了，我该怎么对她说呢？ 5.If you don’t hurry, you__________(be) late for school. （2）省略if的虚拟条件句 在虚拟条件句中，如果有were，had，或should，就可以省略if，把这些助动词放在句首。 练习：改写下面句子，省略句中if 1.If I were you, I would tell them the truth. 2.If we had had enough money, we would have bought the house. 3.If she should come, what should I say to her? 能力训练

关于虚拟语气的完整用法

关于虚拟语气的完整用法

关于虚拟语气的完整用法 第一类 编辑 虚拟语气在条件句中的用法： 条件句有真实条件句和虚拟条件句两种。真实条件句所表示的假设是有可能发生的，此时主句不用虚拟语气；而虚拟条件句则表示一种假想，与事实相反或不大可能会发生，此时用虚拟语气。如： If I have time，I will go. 假若我有时间，我就去。（陈述语气） If I were you，I would go. 假若我是你，我就去。（虚拟语气） 时态类型主句谓语形式 条件句的谓语 形式 例句 与现在事实相反would/should/could/might+ V 原形 动词过去式d id *be 多用wer e 1. If I were you, I should st udy English. 2. I would certainly go if I had time. 与过去事实相反would/should/could/might + h ave done 动词过去完成 式 had done 1. If you had taken my advi ce, you would not have fail ed in the test. 2. If I had left a little earlie r, I would have caught the t

rain. 与将来事实相反would/should/could/might + V 原形 ①动词过去式 ②should +V 原 ③were + to do 1.If you came tomorrow, we would have the meeting. ① 2. If it were to rain tomorro w, the meeting would be pu t off.③ *规律总结：从句都往过去推一个时态，如：与现在相反的if从句就用过去时；与过去相反用过去完成时（即过去的过去） 注：特别说明 1、l would/should/could/might主句谓语中的should主要用于第一人称后；would表示结果还表示过去经常常常做某事，might表示可能性，could表示能力、允许或可能性。比较： If you tried again ，you would succeed. 要是你再试一试，你就会成功的。 (would表结果) If you tried again，you might succeed. 要是你再试一试，你可能会成功的。 (might表可能) If you tried again ，you could succeed. 要是你再试一试，你就能成功了。(could表能力)

if引导的条件状语从句-虚拟语气

虚拟语气是一项语法难点，为了让学员们便于理解与记忆，我们把虚拟语气分成三大块来讨论： 1．名词从句中的虚拟语气标志词+should+动词原形 2．条件从句中的虚拟语气①三种基本态②倒装虚拟句③混时虚拟句④含蓄虚拟句⑤跳层虚拟句 3．其它情形中的虚拟语气（wish/would rather/It’s high time…/If only…/lest） 一．三种基本形态（1） 表虚拟的时间if从句谓语形式主句谓语形式 现在：did / were would (should, might, could)+do 过去：had done/ had been would (should/might/could)+have done(been) 将来：were to/ should+do would (should, might, could)+do 三种基本形态（2）（这是基础，建议牢记下面的例句，争取能脱口而出） 与现在事实相反：If I had enough money, I would buy a book. 与过去事实相反：If I had had enough money, I would have bought a book. 与将来事实相反：If I were to have enough money, I would buy a book. If I should have enough money, I would buy a book. 二、倒装虚拟句（只能与过去/将来事实相反，省去if，只有三种倒装形式）Had I had enough money, I would have bought a book. Were I to have enough money, I would buy a book. Should I have enough money, I would buy a book. 三、混合时间虚拟语气（主要是抓住时间状语） (对过去事实虚拟+对现在事实虚拟) If I had studied English at school, I could read the English novel now. (对现在事实虚拟+对过去事实虚拟) If she were not so careless, she wouldn’t have made such a mistake. 四、含蓄虚拟句（在四级考试中目前还未出现此考点，但在阅读中常见） 3. 虚拟语气用在主语从句中。在句型“It is important (necessary, strange, natural等) that...” 中，that 后面的从句中的谓语动词用(should) + 动词原形。It's necessary that we should have a walk now. 我们现在有必要出去散散步。What would I have done without you? But for their help, I would not have finished the task. But that the doctor arrived on time that day, they would have been dead. Given more time, I would have been able to finish the test.