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whether和if的用法

whether和if的用法
whether和if的用法

一、引导宾语从句,一般既可用whether也可用if。但

1 or not放在whether之后时,只能用whether不用if。

I don’t know whether or not he will come. 我不知道他是不是回来。

注1:如果or not放在whether所引导的从句句尾,则可以用if来替换。

I don’t know whether/if he will come or not.我不知道他是不是回来。

2 在强调任意选择时,用whether…or,此时不用if替换whether。

He asked me whether I wanted to go there by train or by bus.他问我是想乘火车还是坐公共汽车去那里。

注:whether和or一起还有“不管”之意,引导让步状语从句。

Whether he drives or takes the train, he will be here on time.不管开车来还是乘火车来,他都会准时到。

3 虽引导宾语从句,但为了强调宾语部分,也可把从句放在句首,此时只用whether 不用if。

Whether he will come I am not sure.他是不是来我拿不准。

4 从句作介词宾语时只用whether不用if。

It depends on whether it will be fine.那得看是不是晴天。

5 作discuss等动词的宾语时,用whether不用if。

We discussed whether we should close the shop.我们讨论是不是该关掉商店。

6 句子中有if引导的条件句,如再有表示“是否”的宾语从句,用whether不用if。

He asked me whether I’d move to New York if I got the job.他问我如果我得到那份工作是否会搬家到纽约。

7 容易产生歧义时用whether不用if来表示“是否”。

Please let me know if you need help. 如果你需要帮助请告诉我。或:请告诉我你是否需要帮助。对比:Please let me know if you need help.请告诉我你是否需要帮助。

8 如果宾语从句为否定句时,则只用if不用whether。

I don’t know if it won't rain tomorrow..我不知道明天是不是会下雨。

二、在引导主语从句、表语从句、同位语从句时一般用whether不用if。如:

⑴Whether it is true remains a question.(主语从句)那是不是真的还是个问题。

⑵The question is whether it is true.(表语从句)问题是是不是真的。

⑶We have a doubt whether it is true.(同位语从句) 我们怀疑那是不是真的。

注:whether引导主语从句放在主句之后时可用if来代替。

It is unclear whether/if he likes the present.他是不是喜欢那个礼物还不清楚。

三、用在动词不定式之前时用whether不用if。

I don’t know whether to go there at once. 我不知道是不是该立刻去那里。

巧记whether与if异同讲课稿

巧记w h e t h e r与i f 异同

巧记whether与if异同 主从表从同位从,if不用whether用; discuss和介词后,whether引宾从; 不定式、or not后在跟,whether独能显神通; 宾从若是否定句,if发挥其功用; 避免歧义要慎重,其他情况可换用。 一、引导主语从句,常用whether. (1)Whether the meeting will be held is uncertain.会议是否召开还不能确定. (2)It is unknown whether he will come.他是否来还不知道。 3.Whether we’ll go camping depends on the weather. 二、引导表语从句常用whether (1).The question is whether he can finish the work by the end of this week. 问题是到这周末他是否能完成这个工作。 (2).What we want to know is whether he will come to speak to us. 我们想知道的是他能否来给我们讲话。 3.The question is whether it is worth doing. 三、引导同位语从句,常用whether. (1).The question whether he will come is important.他是否来这个问题很重要。 (2).The plan whether we’ll go outing tomorrow hasn’t been made.明天我们是否郊游这个计划还没订。 (3).The question whether we need it has not been decided. 四、引导宾语从句。引导及物动词的宾语从句,用whether, if皆可; 介词的宾语从句,一般只用whether引导;

九年级中考复习:whether和if区别【含答案】

whether 和if区别 whether和if都可以引导宾语从句,表示“是否”,在口语或间接引语中两者可以互换使用。如: I wonder if / whether I can get some advice from you. Ask him whether / if he can come. 但在有些情况下,whether和if的用法有一定区别。 1. whether引导的从句常可以与连词or或or not直接连用,而if一般不能。如: 正: Let me know whether you can come or not. 误: Let me know if you can come or not. 2. 当宾语从句提到句首时,只能用whether引导,而不能用if。如: 正:Whether it is true or not, I can’t tell. 误:If it is true or not, I can’t tell. 3. whether可以引导带to的不定式,if则不能。如: 正:I don’t know whether to accept or refuse. 误:I don’t know if to accept or refuse. 4. whether及其引导的成分可放于介词之后,作介词的宾语,但if不能。如: 正: I worry about whether I hurt her feelings. 误: I worry about if I hurt her feelings. 5. whether可以引导从句,作主语、表语或同位语,而if不能。如: 正: It was uncertain whether he would come. 误: It was uncertain if he would come. 正: His first question was whether Tom had arrived yet. 误: His first question was if Tom had arrived yet. 正: We must consider the question whether we will take these measures. 误: We must consider the question if we will take these measures. 强化练习: 1. The question has not been answered ____ Taiwan will be included on the Olympic

Whether it be 句式中的语法

Whether it be bird, fish or beast... 提问者:johnleo - Q籽一级[收藏] 悬赏沪元:20浏览1206 次 Whether it be bird, fish or beast, the porpoise is intrigued with anything that is alive. 请问这里为什么要用(should) be虚拟式,它不表示与事实相反,不表示愿望、假想和建议。它到底要用虚拟式表示什么呢?谢谢 问题补充:如果要用whether it is bird, fish or beast...和原句有什么区别? 最佳答案 海豚对凡是活的东西都感兴趣,不管是鸟、是鱼,还是野兽。 ------------------------------- 虚拟语气用在由“whether” 引导的让步状语从句中,从句谓语用原形动词。 All engines work on this principle, whether they be large or small. 所有发动机都按这一原理工作,无论它们是大还是小。 We must finish the work before we go home, whether it be early or late. 无论时间早晚,我们必须在回家前干完工作。 All matter, whether it be gas, liquid or solid, is made up of atoms. 所有物质,不论是气体,液体,或固体,都是由原子构成。

在此句型中,可省去whether ,而将be放在主语前。例如: Be it so, we must continue to do the test. We must do our best to fulfil the task, be it ever so hard. ------------------------------------------- Whether it is bird, fish or beast , ................. . 这样的句型属于宾语从句前置。 ------------------- 比如:Whether it is true or not, I can't tell. 陈述的句子是:I can't tell whether it is true or not. -------------------- 你原句的主句是:the porpoise is intrigued with anything that is alive. 因此前面需要一个状语从句,即whether引导的让步状语从句,就要用虚拟语气。

whether和if的用法区别

whether和if的用法区别 whether与if作“是否”讲,在用法上有相同之处,也有不同之处。 一、相同之处。 和if都能引导宾语从句,常置于see,ask,learn,tell,wonder,doubt,find out等动词之后。 如:He asked me whether/is I could help him. I want to know whether/if he lives there. 和if都可用it作形式主语从句中。如:it's uncertain whether/if he'll come this evening. 3.在be uncertain/doubtful之后,常用whether引导宾语从句,有时也可以用if,如:We are uncertain whether/if Mary will come. 二、不同之处。 可置于句首引导主语从句,而if不能。如:___the 2000 Olympic Games will be in Beijing is not known yet. 答案是C。 可用在介词之后,引导宾语从句,而If则不能。如:Success depends on whether we make evough effort. 可引导表语从句,if则不能。如:The puestion is whether it is not worth doing. 4.在名词之后引导同位语从句时,用whether而不用if。如:The question whether the students answered correctly should be decided by the teacher. 后可接不定式,而if不能。如:Please tell us whether to go or stay here. 6.在有些动词(如discuss)之后,只能用whether,而不用if引导宾语从句。如:We discussed whether we should close the shop. 7.在引导否定概念in宾语从句时,只能用if,而不用whether.如:he asked me if I hadn't finished my work. 英语时态一般现在时表示现在、经常或习惯的动作或状态和普遍现象、常识或客观真理;一般过去时用于过去某一时间内发生的或过去习惯性的动作或状态;一般将来时表示将要发生的动作或存在的状态,将来打算做的事情;现在完成时表示过去发生的动作造成目前的结果和对现在造成的影响或表示从过去延续至今的动作、状态和习惯等;将来完成时表示将来某时之前业已完成或发生的事情;过去完成时表示过去某时间之前已经发生的动作或状况,即过去的过去。注意每一种时态与其他时态的交叉使用情况。英语共有十六种时态,其表现形式如下(以study为例): 一般时进行时完成时完成进行时 study studies am studying is studying are studying have studied has studied have been studying has been studying studied was studying were studying had studied had been studying shall study will study shall be studying will be studying shall have studied shall have been studying will have been studying should study would study should be studying would be studying should have studied would have studied should have been studying would have been studying 但考试中出现的一般有以下几种。 第一节一般现在时 一、表示一般性或经常发生的动作或状态 二、表示习惯性动作和状态或普遍的现象或常识 三、表示客观事实、客观规律和客观真理。在宾语从句中,即使主句的谓语动词用了过去时,只要从句表示的是客观真理,从句的谓语动词也要用一般现在时 四、祈使句必须用动词原形,其否定结构用“don`t+动词原形”,如:Go and fetch some water. /Don`t do that. 五、在反义疑问句中,如果主句用肯定句,那么,反问句用否定形式;如果主句用否定形式,那么,反问句就用肯定形式。而且前后在时态上要一致。但祈使疑问句用won`t you进行反问。如:See a film tonight, won`t you? 注:①祈使句后边可用附加疑问句,以加强语气。如果祈使句用肯定形式,附加疑问句用否定形式;如果祈使句用否定形式,附加句用肯定形式;如:Come here next Sunday, won`t you /Don`t tell it to anyone, will you ②但如果祈使句的前一句有了表示强烈肯定的语言环境,即使祈使句用了肯定形式,其附加成分也可以用“will you”(表示肯定,如

If和+whether的用法讲课教案

If和whether if不能替换whether的5种情况 1.正式文体中,句中有or not 时 2.引起主语,表语,同位语从句时 3.作介词宾语时 4.放不定式前,与不定式组成词组时 5.作discuss等词的宾语时 以上是if和whether表示"是否"之意的区别,此外,if还有加入的意思,引起条件状语从句;而whether 另有不管无论之意,引起让步状语从句 whether与if作“是否”讲,在用法上有相同之处,也有不同之处。 一、相同之处。 1.whether和if都能引导宾语从句,常置于see,ask,learn,tell,wonder,doubt,find out等动词之后。 如:He asked me whether/is I could help him. I want to know whether/if he lives there. 2.whether和if都可用it作形式主语从句中。如:it's uncertain whether/if he'll come this evening. 3.在be uncertain/doubtful之后,常用whether引导宾语从句,有时也可以用if,如:We are uncertain whether/if Mary will come. 二、不同之处。 1.whether可置于句首引导主语从句,而if不能。如:___the 2000 Olympic Games will be in Beijing is not known yet. A.whether B.If C.Whether D.That 答案是C。 2.whether可用在介词之后,引导宾语从句,而If则不能。如:Success depends on whether we make evough effort. 3.whether可引导表语从句,if则不能。如:The puestion is whether it is not worthdoing. 4.在名词之后引导同位语从句时,用whether而不用if。如:The puestion whether the students answered correctly should be decided by the teacher. 5.whether后可接不定式,而if不能。如:Please tell us whether to go or stay here. 6.在有些动词(如discuss)之后,只能用whether,而不用if引导宾语从句。如:We discussed whether we should close the shop. 7.在引导否定概念in宾语从句时,只能用if,而不用whether.如:he asked me if I hadn't finished my work. whether和if都可以引导宾语从句,表示“是否”,在口语或间接引语中两者可以互换使用。如: I wonder if / whether I can get some advice from you. Ask him whether / if he can come. 但在有些情况下,whether和if的用法有一定区别。 1. whether引导的从句常可以与连词or或or not直接连用,而if一般不能。如: 正:Let me know whether you can come or not. 误:Let me know if you can come or not. 2. 当宾语从句提到句首时,只能用whether引导,而不能用if。如: 正:Whether it is true or not, I can’t tell. 误:If it is true or not, I can’t tell. 3. whether可以引导带to的不定式,if则不能。如: 正:I don’t know whether to accept or refuse.

if、 whether 用法总结

whether,if if和whether通用,都表示“是否”的意思。一般来说,后者比较正式,在口语中前者常用来代替后者。但两者有时具有不同的暗示。用whether时,正反两面的选择意义较强,问话人并不在意回答是肯定还是否定;而用if时,则比较强调单方面,即正面,问话人希望得到肯定的回答。另外,还要注意以下几点: 一、whether和if都可以与or not连用;但写在一起时,只能用whether,不能用if。如: I don't care whether (或if) it will rain or not. I don't care whether or not it will rain. (不用if) 二、在引导宾语从句时,应注意: 1、表示“是否”时,两词都能引导宾语从句。 I wonder if/whether you can examine him now. 2、宾语从句移置句首时,用whether,不用if。

Whether it is true or not,I can't say. 3、宾语从句为否定形式时,通常用if,而不用whether。 I asked Tom if Mary wouldn’t come. 4、作discuss等词的宾语,用whether不用if。 We discussed whether we should buy the gift for him. 三、在下列情况下,只能用whether,不能用if。 1、与不定式连用时,只能用whether. He can't decide whether to accept or refuse. 2、在介词后,只能用whether。 Everything depends on whether he is ready. 3、在名词后作同位语时,只能用whether。

if与whether用法区别

if与whether用法区别 收集整理:王俊尧 1.下列情况只能用whether: (1)直接与or not连用时,往往用whether(if…or not也可以使用)。如: Let me know whether or not he will come. (= Let me know whether / if he will come or not.) 让我知道他是否能来。 I don't know whether or not he does any washing. (= I don't know whether / if he does any washing or not.) 我不知道他在家洗不洗衣服。 I wonder whether we stay or whether we go. 我想知道我们是去还是留。 (2) 在介词之后用whether。如: I'm interested in whether he likes English. 我关心的是他是否喜欢英语。 We're thinking about whether we can finish the work on time. 我们正在考虑是否能按时完成这项工作。 I worry about whether I hurt her feelings. 我担心是否伤了她的感情。 (3)在不定式前用whether。如: He hasn't decided whether to visit the old man. 他尚未决定是否拜访那位老人。 I don't know whether to go.我不知去否。 He hasn't decided whether to go by bus or by train. 他还未决定是乘公共汽车去还是坐火车去。 (4)whether置于句首时,不能换用if。如: Whether this is true or not,I can't say. 这是否真的我说不上来。 (5)引导主语从句和表语从句时宜用whether。如: Whether she will come or not is still a question. 她是否能来还是个问题。 The question is whether we can catch the bus. 问题是我们能否赶上公共汽车。 (6)若用if会引起歧义时,则用whether。如:

whether和if用法

1.whether和if均可用来引导主语从句,但if引导的从句不能位于句首。 如:Whether they win or lose is all the same to me. 他们是赢是输於我都一样.(此时whether不能换作if ) It's doubtful whether there'll be any seats left.说不上还有没有空座位了.(此句whether能换作if) 2.whether和if均可用来引导宾语从句。如: ①I don't know whether/if I will be able to come.我不知道我是否能来. ②She asked me whether/if I was interested in working for her.她问我是否有兴趣为她工作。 ③We'll be told tomorrow whether we should take the exam or not.我们明天才知道是不是应该参加考试. ④I asked him whether he had done all the work himself or whether he had had any assistance. 我问他这些工作都是他自己做的还是别人帮他做的. ( 注意: 在两个供选择的从句之间若用or字, 则须重复whether一字. ) 注:⑴当强调宾语从句并将其提前时只能用whether。 如:Whether I'll have time to go with you I am not sure.我很难说我们是否有时间跟你们一起去。 ⑵从句作介词宾语时只用whether不用if。 如:She was undecided about whether she should accept his offer. 她拿不定主意应该不应该接受他的好意 ⑶当whether和or not连用时,只用whether不用if。当or not放在whether引导的从句句尾,则可以用if来替换。 如: I don’t know whether or not he will come.我不知道他是不是回来。 I'll be happy whether/if I get the job or not我能不能得到那份工作都一样高兴 ⑷当whether和or 连用表示明确的选择时,只用whether不用if。 如:He asked me whether I wanted to go there by train or by bus. 他问我是想乘火车还是坐公共汽车去那里。 He hesitated about whether he should drive or take the train.他开车去还是坐火车去, 犹豫不决注:whether 和or 连用还可以引导让步状语从句,此时也不用if。 如:We'll go on with the work, whether we can find the necessary tools or not. 不管我们能否找到所需的工具,我们要把这件工作做下去。 Whether or not it rains / Whether it rains or not, we're playing football on Saturday. 无论下不下雨, 我们星期六一定踢足球. ⑸动词discuss,decide,consider等后习惯上也常用Whether引导从句,不用if。 They discussed whether they should leave at once.他们讨论了是否应该马上离开。We discussed whether the house should be sold. 我们讨论了这房子是否应卖掉。 3.表语从句用whether引导不用if. 如:①The doubt was whether you had broken the beautiful vase. 疑问是你是否打坏了这只漂亮的花瓶。 4.同位语从句用whether引导不用if. 如:①The question whether we'll build another lecture building hasn't been settled. 是否要另建一幢教学楼的问题还未决定。 5. 在动词不定式之前,只能用whether,不能用if。 如:①The question is whether to go to Munich or Vienna. 问题是去慕尼黑还是去维也纳. ②She doesn't knows whether to get married now or wait. 是否现在结婚或是等待她不知道。 ③We were wondering whether to go today or tomorrow. 我们弄不清是今天走还是明天走. ④I'm not sure whether to resign or stay on. 我拿不准主意是辞职还是留任. Answers: BADDC ABCAB ABADD B

最新下面就whether的这一用法作一归纳资料

精品文档 下面就whether的这一用法作一归纳。 一、作“是……还是……”解时,whether表示一种选择,其后可以跟介词短语或不定式短语。 1. 后跟介词短语。例如: (1)She made the mistake whether by accident or by design. 不知她是偶然还是故意去犯这个错误的。 (2)Whether through choice or obedience I don”t know, but he certainly did all the work very well. 是出于内心自愿还是奉命行事,这我不晓得,不过他的确是把所有的工作都做好了。 2. 后跟动词不定式短语。例如: (1)I don’t know whether to accept the offer or refuse it. (= It is doubtful whether to accept the offer or refuse it. )对这个提议,我不知道是接受好,还是拒绝好。 (2)It is to be decided whether to go or stay here. 是走还是呆在这儿还有待决策。(it作形式主语。) (3)Will you advise me whether to accept his suggestion (or not)? 向你请教,我是否要接受他的建议? 二、作“是否,会不会”解时,whether可用来引导名词性从句,即主语从句、宾语从句、表语从句和同位语从句。 1. 引导主语从句。引导主语从句时,可用it作形式主语。例如: (1)Whether they consider this opinion or not is not clear. (= It is not clear whether they consider this opinion or not. ) 他们是否考虑这个意见还不清楚。 (2)Whether we shall be able to come is doubtful. (= It is doubtful whether we shall be able to come. )我们是否能够来,尚不确定。 2. 引导宾语从句。这时whether可与if换用。例如: (1)A simple experiment will show whether air has weight or not. (= A simple experiment will show if air has weight. )一个简单的实验就可以证明空气是否有重量。 (2)I wonder whether we shall be in time for the last bus or (whether we shall)have to walk home. 我不知道我们是否可以赶上最后一班公共汽车,或是只好步行回家。 3. 引导表语从句 The question is whether we have to make a decision at once or not. 问题是我们是否必须马上作出决定。 4. 引导同位语从句。它的前面通常有fact, conclusion, news, problem, question, idea, doubt等名词作同位语结构的中心词。例如: (1)She has answered the question whether or not this supermarket is the largest one in the region. 她回答了这样一个问题,即该超市在这个地区是不是最大的。 (2)The question whether we ought to call in a specialist was answered by the family doctor. 关于我们是否该请一位专家过来的问题,家庭医生已经作了回答。 三、作“不论……还是……”解时,whether引导让步状语从句。例如: (1)Whether you can see the moon or not, it is always round. 不论你能否看得见,月亮总是圆的。 (2)You may rely upon my help, whether others help you or not. 不论别人帮不帮你,你都可以依赖我的帮助。 四、whether or no除了能够像whether or not一样引导名词性从句外,还能单独放在句首或句末,作“无论如何”解。这时,它仅起状语作用。例如: 精品文档

If 和whether的区别 (含 讲解+习题+答案)教学文稿

If 和whether的区别 if和whether都可译为\"是否\",二者引导宾语从句时通常可以互相替换,口语中多用if 代替whether.例如:Ask if/whether he plans to come to the meeting. 而以下几种情况中, 只能用whether: 1. 强调两方面的选择,特别是句中有or not时.如: Let me know whether you can come or not. 2. 宾语从句前置时.如: Whether this is true, I can\'t say. 3. 引导主语、表语、同位语从句时.如: Whether the football game will be played depends on the weather. (主语从句) The question is whether he can do it. (表语从句) The question whether we should go with them must be decided at once. (同位语从句) 4. 在介词之后作介词的宾语时.如: I haven\'t settled the question of whether I\'ll go back home. 5. 在不定式前与不定式一起组成词组时.如: Whether to go or stay is still a question. 6. 在discuss, decide 等动词后作宾语时.如: We discussed whether we should go there by plane. 值得注意的是:if还可以引导条件状语从句,是\"假如;如果\"之意,而whether可以引导让步状语从句,是\"不管;无论\" 之意.如: If you ask him, he will help you. I shall go, whether you come with me or stay at home. 一、if或whether引导宾语从句时,作“是否”讲,常放在动词ask 、see 、say 、know 和find out等后面.一般情况下,两者常可换用,在口语中多用if.如: 例1 Nobody knows whether (if) it will rain tomorrow. 没有人知道明天是否下雨. 例2 Lucy asked whether (if) they had a cotton sweater .露西问他们是否有棉制的羊毛衣. 二、if或whether引导宾语从句时,要注意三个方面,即连词、语序和时态. 1 if或whether不能和that 或其它连词(副词)同时使用,也不能省去.如: 例3 我不知道他今天是否会来. [误] I don’t know that if(whether) he will come here today . [正] I don’t know if(whether) he will come here today . 例4他走过来看看猫是否出了毛病. 误] He came to see what if (whether) there was wrong with his cat . [正] He came to see if (whether) there was wrong with his cat . 2 if或whether引导的宾语从句时,虽具有疑问意义,但从句语序应用陈述句语序.如:例5 Did you know the way to the hospital ? The old woman asked me . The old woman asked me .if (whether) I knew the way to the hospital .老妇人问我是否知道去医院的路. 3 if或whether引导的宾语从句应和主句的时态保持一致.即主句为一般现在时,从句用

if和whether的用法

if和whether的用法: 一、if或whether引导宾语从句时,作“是否”讲,常放在动词ask 、see 、say 、know和find out等后面。直接引语如果为一般疑问句,变为间接引语时就用if或whether引导,并把疑问句语序变为陈述句语序。一般情况下,两者常可换用,在口语中多用if。如: 二、if或whether引导宾语从句时,要注意三个方面,即连词、语序和时态。 ◆if或whether不能和that 或其它连词(副词)同时使用,也不能省去。 ◆if或whether引导的宾语从句时,虽具有疑问意义,但从句语序应用陈述句语序。 ◆if或whether引导的宾语从句应和主句的时态保持一致。即主句为一般现在时,从句用任一种时态;主句为一般过去时,从句则用过去时中的任一种时态。 ◆如果主句中的时态为一般过去时,从句中的时态要求发生相应的变化与主句的时态保持一致。(表示客观规律,自然现象和真理的则不变。) 三、if和whether的区别: ◆在动词不定式之前只能用whether 。 ◆在whether ……or not 的固定搭配中。 ◆在介词后,只能用whether。 ◆宾语从句放在句首表示强调时,只能用whether 。

◆用if会引起歧义时,只用whether。如用whether可避免歧义 eg:“Are they from France?”He asked me . →He asked me if they were from France. My physics told us that light travels faster than sound. 物理老师告诉我们光比声音传播的快。

whether的用法和例句

whether的用法和例句 whether有是否;不管;无论等意思,那么你知道whether的用法吗?下面跟着一起来学习whether的用法和例句吧,希望对大家的学习有所帮助! whether的用法1:whether用作连词,意思是“是否,是不是”,可引导名词从句或动词不定式短语。 whether的用法2:whether还可引导让步状语从句,意思是“不管,无论”,从句中通常用一般现代时代替将来时。 whether的词汇辨析if,whether 这两个连接词均含“是否”之意。 if 作“是否”解时,多用于口语,引出宾语从句,不能直接跟or not连用。 whether 多用于书面语中,可与or或or not连用,除引出宾语从句外,还可引出主语从句、表语从句、同位语从句或与不定式连用。 whether的用法例句1. The key issue was whether the four defendants acted dishonestly. 关键问题是4名被告是否存在欺诈行为。 2. It's not a case of whether anyone would notice or not.

这不是会不会有人注意到的问题。 3. Whether such properties are a good deal will depend on individual situations. 这样的地产是否可获得大笔收益还要视具体情形而定。 4. It remains to be seen whether her parliamentary colleagues will agree. 她的国会同僚是否同意,现在还无从知晓。 5. It was touch and go whether we'd go bankrupt. 我们是否会破产还很难说。 6. At first I really didn'tcare whether he came or not. 起先我真的不在乎他是否会来。 7. I couldn't decide whether he was incredibly brave or just insane. 我不能判定他到底是英勇无畏还是精神失常。 8. The jury is out on whether or not this is true. 这是否属实仍未得出定论。 9. It is questionable whether the expenditure on this project is really justified. 该项目的开支是否真的合理还未可知。 10. Some military commanders wavered over whether to support the coup. 军队的一些指挥官在犹豫是否支持政变。

if 和 whether 用法区别

if 和 whether 用法区别 1. 引导宾语从句 在引导宾语从句时,whether和if通可以互换,在 ask,care,doubt,know,learn,see,tell,try,wonder等动词之后尤其如此。例They don’t care a bit whether my reports are good or bad.. I am not sure if/whether I’ll have time. 但是,必须注意以下几点: 1)如果从句是否定结构,则用if不用whether.例如: I don’t care if he doesn’t show up .他来不来我都不在乎。 但是,当doubt是否定式时,则不用whether或if,要改用that,因为句子本身已没有“怀疑”或选择之意。度比较: She never doubt for a moment that she was right.她对自己是正确的这一点从不怀疑。 I doubt if that was what he wanted. 2)宾语从句前置时只能用whether,如: Whether he lives there,I want to know. 3)在decide,dicuss等动词后,通常只跟whether引导的宾语从句。如: They dicussed whether they should close the shop. 4)出现在介词后面的宾语从句只能用whether引导,如: It all depends on whether she likes the boss or not .一切都取决于她是否喜欢这位上司。 5)句中含有引导条件状语从句的if时,用whether不用if,如: Bill asked whether ,if I got the job,I’d move to York.比尔问如果我得到这份工作是否还要迁到约克。 2.引导主语从句 主语从句位于句首时,用whether不用if Whether they win or lose is all the same to me. Whether it will do us harm or good remains to be seen. 但是,当采用形式主语it,而将主语从句后置时,用whether和if均可(尽管whether更常用): It makes no difference to me whether/if it’s foggy or clear..(高二册,第220页) 3.引导表语从句 引导表语从句时,一般用whether.例如: The question is whether they can cooperate with us.问题是他们能否与我们合作。 4.引导同位语从句时一般用whether.例如: We will soon discuss the problem whether we should take some effective measures to protect the animals and plants in our region.我们很快将讨论是否应该采取一些有效措施来保护本地区的动植物这一问题。 5.引导让步状语从句 1)引导让步状语,一般用whether.例如: Whether you like it or not ,you’ll have to do it . Whether the weather is good or bad ,they will set off as they planned.无论天气是好是坏,他们都将按计划启程。

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