初二条件状语从句讲解练习

条件状语从句

状语：状语是句子的重要修饰成分。状语是谓语里的另一个附加成分,它附加在谓语中心语的前面,从情况,时间,处所,方式,条件,对象,肯定,否定,范围和程度等方面对谓语中心进行修饰或限制。用来说明地点、时间、原因、目的、结果、条件、方向、程度、方式和伴随状况等。

状语一般由副词、介词短语、分词和分词短语、不定式或相当于副词的词或短语来担当。其位置一般放在句末，但也可放在句首或句中。

副词是一种用来修饰动词,形容词,副词或全句的词,说明时间,地点,程度,方式等概念。

1.副词一般在句子中做状语．

He speaks English very well. 他英语说得非常好.中的very是程度副词，用来修饰well。very well是修饰speak的程度状语。

He is playing under the tree.他在树下玩儿.中的under the tree 是地点状语.

2. 不定式在句子中可以作目的状语。

I come specially to see you.我专门来看你.

3.介词短语

Ten years ago, She began to live in Dalian.

The boy was praised for his bravery.

4.从句作状语

When she was 12 years old, she began to live in Dalian.

If I am not busy tomorrow, I will play football with you.

5.分词作状语

Having had a quarrel with his wife, he left home in a bad temper。

Inhibited in one direction, it now seems that the Mississippi is about to take another.

在复合句中，由从句表示的状语叫做条件状语从句。它可以用来修饰主语中的动词.形容词.副词等。根据它表达的意思，状语从句可以分为时间状语从句，原因状语从句，条件状语从句，比较状语从句，目的状语从句，结果状语从句和让步状语从句等。

定义

由连接词if或unless引导的状语从句叫做条件状语从句。（注意：在含有条件状语从句的复合句中，如果主句是一般将来时态，从句要用一般现在是[主将从先原则])在英文中，条件是指某一件事情实现之后（状语从句中的动作），其它事情（主句中的动作）才能发生，通常译作“假如，如果，除非”。

引导词：

①常用引导词： if , unless

②特殊引导词: as long as（除非；只要），supposing（假设），on condition that（条件是），in case（如果）

条件状语从句的位置

可放在句首或句尾，放在句首时常用逗号与主句隔开。

If 引导词用法

if 引导的条件句有：真实条件句和非真实条件句两种:

1.真实条件句：表示在某种条件下某事很可能发生。

如:

If you ask him, he will help you.

如果你请他帮忙,他会帮你的。

If you fail in the exam, you will let him down.

如果你考试不及格,你会让他失望的。

If it rains tomorrow, we won’t go on a picnic.

如果明天下雨，我们就不去野餐。

注意：在含有条件状语从句的复合句中，表示将来时态，主句是一般将来时态，从句要用一般现在时[主将从现原则]，并且，切记紧跟着if的那句话是从句。）

2.非真实条件句是虚拟语气的一种，表示与事实相反，不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设,从句多用一般过去时或过去完成时。

如: If I were you, I would invite him to the party.

如果我是你,我会邀请他参加聚会。

I would have arrived much earlier if I had not been caught in the traffic.

如果没有堵车,我会到的早一点儿。

If I were you, I would go with him.

如果我是你,我会和他一起去的。

unless引导词用法

固定搭配： unless = if...not 除非,若不,除非在……的时候

You will fail to arrive there in time unless you start earlier. If you don’t start earlier, you will fail to arrive there in time.如果你不早点动身,你就不能及时赶到那儿。

Unless it rains, the game will be played.

If it dosen't rain，the game will be played.

除非下雨,比赛将照常进行。

Let's go out for a walk unless you are too tired.

If you are not too tired, let's go out for a walk.

经典语句：If it dosen't rain tomorrow,we will go to the zoo.

条件状语从句就是用以表示“在某种条件下,会……”

由as (so) long as, in case引导。

So long as you’re happy, it doesn’t matter what you do.

只要你高兴，你做什么都没有关系。

You may borrow my book as long as you keep it clean.

只要你保持书的清洁，你就可以把我的书借去。

Take your umbrella in case it rains.

带着你的伞吧，以防下雨。

完成下列句子

1。如果你请求他，他会帮你的

If you ___him, he ___ ____you

2。如果她早点儿起床，就有时间在家里吃早餐

If she____ ____a little earlier, she’ll have time to eat breakfast at home.

3。如果你参加聚会，你将会过得很开心。

If you____ the party ,you_____ ____ a great time.

4。如果明天下雨，我们将不去野餐

If it ____tomorrow, we _____ _____ for a picnic.

5。如果你经常听英文歌，你将会喜欢英语

If you often _____ ____English songs,you___ ___English.

1、 ask will help

2、 gets up

3、 join will have

4、rains won’t go

5、 listen to will like

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的，发生时间较长，并强调主句和从句的动作同时发生（或者相对应）。While 有时还可以表示对比。While John was watching TV, his wife was cooking. as 意为“一边…一边…”。As 引导的动作是延续性的， 发生时间较短，一般用于 主句和从句动作同时发 生；as也可以强调一前一 后。The writer was angry as he was travelling on a train to London because someone had invaded his “space”. He smiled as he stood up. after 意为“在…之后”。表示主句 动作发生在从句动作之 后。主句与从句的动作时 间关系与before引导的从 句相反。With many hungry visitors waiting, don’t stay too long at your table after you have finished. If an early exit is necessary, you can leave after a scene is over. before 意为“在…之前”。引导的从 句不用否定形式的谓语， 并且当before引导的从句 位于主句之后，有时译成 “就，才”。当主句用将来时，You can’t watch TV before you finish your homework. Before it ended, the theatre was almost empty. My father had left for Canada

时间状语从句讲解和练习(答案)

时间状语从句 用句子表达一件事情或一个行为发生的时间，这个句子就叫时间状语从句。时间状语从句根据其所表示的时间不同，所使用的连词也不同。下面我们一起来看一下几个常见的时间状语从句： 1．when引导的从句：表示主句的动作和从句的动作同时发生，或从句的动作发生在主句动作之前。 例如：I was going out when a visitor came. (动词动作同时发生。)我正要出门，有客人来访。 I shall tell her the good news when she comes.她来时，我将告诉她这个好消息。 小试牛刀：I found mother cooking for me. I got home.(when)_______________________________________ He was listening to the radio when I home. (get) 2．while 引导的从句：表示“当……过程中”，强调某一段时间内主句和从句中谓语动词所表示的动作在同一时期发生。由于while从句表示一个持续的行为，所以从句中要用持续性动词，并且持续性动词常用进行时态。例如：Keep an eye on my little sister while I am away.我不在时，请照看一下我的小妹妹。 While we were watching TV, Jim came in. 我们看电视的时候，Jim进来了。 小试牛刀：It started to rain. We were playing football.(while)_______________________________________ Lucy was cleaning the room Lily was listening to music. 3．as引导的时间状语从句：表示“当……的时候；一边……一边……；随着……”，其从句的主语与主句的主语往往是同一人或物。 例如：She sang as she worked. 她一边工作一边唱歌。=She was singing as she was working. I saw him as he was getting off the bus. 正当他下公共汽车时, 我看见了他。 小试牛刀：we walked, we talked. You will grow wiser you grow older. 4．before引导的从句：一般表示主句的动作发生在从句动作之前。 例如：I didn’t know any English before I came here. 我到这儿来之前，一点英语都不懂。 例如：I had written my report before my father came back. 小试牛刀：He bought the ticket he went to see the film. 5．after引导的从句：表示主句的动作发生在从句动作之后。 例如：After he locked the door, he left. 他锁上门后，就走了。 After he had finished his work, he played a game of chess with his friend. 他做完工作后，和朋友下了一盘棋。小试牛刀：I will go out to play basketball with you. I finish my homework.(after) _______________________ _ He left the classroom he had finished his homework the other day. 6．since引导的从句：表示“自从……以来”，从句中的动词一般表示动作的起点，用过去时。主句中的动词表示动作延续的情况，一般用现在完成时。如果主句中的动词表示的不是延续的动作而是表示目前的状态，可用一般现在时。 例如：Since he met this good friend, he has made great progress in his studies. 自从遇见了这个好朋友，他已在学习上取得了巨大的进步。 例如：It is twenty years since she joined the Party. 她入党二十年了。（主句中的动词表示的是状态，用现在时。）小试牛刀：it is five years since we last time.（meet） Mr green has taught in that school since he (come) to China three years ago. 7．until 引导的从句：表示一个动作持续到某一时刻。 （1）表示“直到……”，如果主句中的谓语动词是延续性动词时，用肯定或否定形式都可以，但表达的意思不同。（2）表示“直到……才”，主句用否定式，从句用肯定。如果主句中的谓语动词是瞬间动词时，必须用否定形式。

状语从句讲解和练习

状语从句 状语从句修饰主句/主句的谓语。一般有九大类：表示时间、地点、原因、目的、结果、条件、让步、比较和方式等。 时间状语从句 1. 用when引导：when表示“当……时候”。如： Things were different when I was a child. 我小时候情况与现在不同。 People breathe more slowly when they are asleep. 人睡觉时呼吸比较缓慢。 2. 用while引导：while表示“当……时候”。如： We must strike while the iron is hot. 我们要趁热打铁。 I went swimming while the others played tennis. 我去游泳，其余的人都打网球去了。 注意：while 所引导的时间状语从句中谓语动词必须是持续性的，不能是短暂性的。 3. 用as引导：as表示“当……时候”“随着”。如： He dropped the glass as he stood up. 他站起来时，把杯子摔了。 We get wiser as we get old. 随着年岁的增长，我们也变得聪明些了。 4. 用before引导：before表示“在……之前”。如： Turn off the lights before you go to bed. 睡觉前要关灯。 Before he went to university he was a worker. 上大学之前他是工人。 5. 用after引导：after表示“在……之后”。如： I will tell you after they leave. 他们走我再告诉你。 After you finish the letter show it to me．信写完后给我看看。 6. 用until / till引导：until / till表示“直到……”。如： He waited until she was about to leave. 他等着一直到她准备离开。 I watched him until he disappeared in the distance. 我瞧着他直到他在远处消失。 这类句型的主句动词通常只能是延续性动词，不能是终止性动词。但是，在否定句中，主句动词可以是终止性动词，此时构成not…ntil [till]…句式，意为“直到……才……”。如：

高中英语状语从句讲解和练习(含答案)之欧阳语创编

状语从句讲解和练习状语修饰动词、形容词、副词或整个句子。通常由副词、介词短语、动词不定式、分词和从句等担当。例如：1. Nat urally , our grandparents wer e pleased to get our phone call . (副词)2. We worked ha rd , from sunrise to sunset . (介词状短语)3. To help my d isabled aunt , I spend an ho ur working in her house ever y day . (不定式)4. Seen from a distance , the farmhouse l ooked deserted . (过去分词)

5. I know how to light a ca mp fire because I had done it before .（原因状语从句）状语的位置比较灵活，可以位于句首、句末或句中。enough用作状语修饰形容词和副词时必须后置。 状语从句主要用来修饰主句或主句的谓语。一般可分为九大类，分别表示时间、地点、原因、目的、结果、条件、让步、比较和方式。尽管种类较多，但由于状语从句与汉语结构和用法相似，所以理解和掌握它并不难。状语从句的关键是要掌握引导不同状语从句的常用连接词和特殊的连接词即考点。现分别列举如下:1．时间状语从句常用引导词：when, as, while, as soon as, while, before, after, since , ti ll, until特殊引导词：the minute, the moment, the sec ond, every time, the day，the instant, immediately , directly, no sooner … than, hardly …when, scarcely

状语的具体讲解(十)方式状语

句子成分之——－状语的具体讲解（十）方式状语 具体用法：方式状语 导读：方式状语，描述动作、事件或情况发生及存在的方式。其表达方式通常有： 1. 方式副词（介绍了常用副词） 2. 介词短语（区分了by，through, in, with四个表方式的介词用法） 3.形容词短语 4. 方式状语从句 （1）as if/as though （2）as/like (just) as…so…表示“正如”、“像……”。 （3）(in) the way (that) 引导的方式状语从句“以…方式” （一）方式副词，用来回答how 提出的问题。常见的此类副词主要有：angrily 生气地anxiously 焦急地badly 糟糕地 calmly 冷静地carefully 仔细地carelessly 粗心地 clearly 清晰地closely 紧密地dangerously 危险地 eagerly 热心地effectively 有效地faithfully 忠诚地 firmly 坚定地happily 高兴地nervously 紧张地 suddenly 突然地thoroughly 完全地uncomfortably 不舒适地 well 很好地widely 广泛地willingly 情愿地 方式副词，等于介词短语“in a +形容词+ way”。 例如：angrily 等于in an angry way Some Internet words are widely used and spread.有些网络语言被广泛地使用和传播。 Volunteers always help others eagerly.志愿者们总是热心地帮助他人。 Can you speak it clearly?你能清楚地讲一下它吗？ A dog came out from behind the door suddenly.一只狗突然从门后跑了出来。 （二）介词短语，常见的有：in, by...,with..., through...等。 1. by的用法 （1）by+n/动词ing表示“通过……方式” The blind learn something by touching. 盲人通过触摸学习东西。

(完整)高中英语状语从句讲解及练习

状语从句 在复合句中作状语，位置灵活。 状语从句可分为时间状语从句，目的状语从句，条件状语从句，让步状语从句，地点状语从句，原因状语从句，方式状语从句，结果状语从句。 （一）时间状语从句 1.when, as, while a.when表时间，从句既可以用延续性动词，又可以用瞬间动词。 Eg: When I get there I will call you. 如果when引导的时状的主语与主句的主语相同，而从句的谓语又是be动词时，那么从句中的主语与be 可省。 Eg：When （you are）in trouble, you can ask her for help. 如果when引导的时状的主语与主句的主语相同时，往往可以用“when+分词”的形式代替该状从。Eg：When I came into the room(When coming into the room), I found the light was off. b.while表时间，从句需用延续性动词，或者主句的动作发生在从句的动作进行过程中。主句的谓语动词 通常是非延续性动词。 Eg: He came in while I was reading a book. I met her while I was in school. c. as表时间，与when相似，但侧重强调主从句动作同在时间点或同时间段进行。同时可表示主句的动作随着从句的动作的变化而变化。 Eg: He jumps as he sings. As the wind rose, the noise increased. 2.before(在……之前)与after（在……之后） Eg：See me before you leave. I saw them after I arrived. 3. till与until 肯定形式表示的意思是"做某事直至某时"。否定形式表达的意思是"直至某时才做某事"。 Eg: Wait till/untill I call you. 等着直到我叫你。 She didn't arrive till/until 6 o'clock.. 她直到6点才到 但是置于句首时只可用untill. Until you told me, I had heard nothing of what happened. 直到你告诉我以前，出了什么事我一点也不知道。否定形式有另外两种表达方式： (1)Not until …在句首，主句用倒装。 Man did not know what heat was until the early years of the 19th century. =Not until the early years of the 19th century did man know what heat was. (2)It is not until…that… He will not go to bed until his mother comes home. =It is not until his mother comes home that he will go to bed. 4. as soon as/the moment/the instant/the second/the minute/immediately和hardly/scarcely…when, no sooner…than a. as soon as/the moment/the instant/the second/the minute/immediately 表示主句和从句的动作同时发生。译为“一……就” Eg：As soon as she heard the news, she began crying. b. hardly/scarcely…when, no sooner…than都可以表示"一……就……"的意思，但主句谓语动词一般要用过去完成时，从句谓语动词要用一般过去时。 Eg：I had hardly / scarcely got home when it began to rain. I had no sooner got home than it began to rain.注意：如果hardly, scarcely 或no sooner置于句首，句子必须用倒装结构：Hardly / Scarcely had I got home when it began to rain. No sooner had I got home than it began to rain。 1. We called the First - Aid Center_______ the traffic accident happened. A. immediately B. shortly C.quickly D. hurriedly 2. The roof fell _____he had time to dash into the room to save his baby. A. before B. as C. after D. until 3. A good storyteller must be able to hold his listeners’ curiosity he reaches the end of the story. A when B whenever C.after D.until 4. I had just started back for the house to change my clothes _______ I heard the voices. A. as B. for C. while D.when 5. ______ the day went on, the weather got worse. １

并列句和状语从句讲解.

并列句和状语从句讲解 一简单句 主语+谓 1 主语+Vt+宾语（动宾结构） 2 主语+Vt+宾语+宾补 3 主语+Vt+宾语（Sb）+宾语（Sb）(双宾语) 4 主语+Vi 5主语+Vi+介词+宾语（介宾） 6主语+系动词+表语（系表结构） 二并列句 1 表示递进 2 表示选择 3 表示转折 4 表示因果 三复合句 1 定语从句 2 名词性从句：主语从句、宾语从句、表语从句、同位语从句 3 状语从句：时间、地点、原因、目的、结果、条件、让步、方式、比较 一并列句 1 表示递进：and, not only…but also…,neither…nor…,not…but… 2 表示选择：or, either…or…,otherwise 就近原则：Neither he nor I am living here. Either he or I am living here. Not only he but also I am living here. 3 表示转折：but, yet, whereas, while 4 表示因果：so, as, for, because, since, now that 二状语从句 1 时间状语从句 (1)when, while, as (2)as soon as, immediately, instantly, directly, the moment, the minute, the instant, no sooner…than…,hardly/scarcely…when… The moment/Immediately I heard the voice, I knew Father was coming. No sooner had we arrived at the station than the train left. Hardly had we got home when it began to rain. (3)till, until, not…until(部分倒装，强调句) I didn’t know about it until you told me.