Whether it be 句式中的语法

名词性从句知识点考点

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表语从句或同位语从句在某些表示"建议,请求,命令" 表语从句或同位语从句在某些表示"建议,请求,命令" 在某些表示等意义的名词后同样需用" 动词原形" 等意义的名词后同样需用"(should) + 动词原形"来构成谓语.这类名词有: 谓语.这类名词有: advice,desire,decision,idea,order,plan,proposal,recommendation,request,suggestion等.如: 等 My suggestion is that we (should) read English newspapers to improve our English. The teacher suggested that we (should) have a rest. It is necessary that he (should) come to see us.
名词性从句知识点考点
考点一,名词性从句的语序问题. 考点一,名词性从句的语序问题. 考点二, 作为形式主语形式宾语的用法形式主语或的用法. 考点二,it 作为形式主语或形式宾语的用法. 考点三, 的区别. 考点三,考查 that 与 what 的区别. 考点四,考查whether 与 if 以及与 that 的区别. 的区别. 考点四,考查考点五, 疑问词+ever 引导的名词性从句考点五,考查疑问词的区别. 以及与 no matter + 疑问词的区别. 考点六, 考查名词性从句的虚拟语气问题. 考点六, 问题.
7.This is the main use that the scientists make ___of natural resources. D A.it B.which e D.\ 8.Mr. Cooper wanted to buy the house and he told me that ___the house C cost, it would be ___it. A.however\worth B.how much\worth C.whatever;worth D.what\worthy 9.Mr. Tom enjoyed___again by working in the factory because he often C hates____while staying alone at home all day long. A.him\that B.it\it C.himself\it D.himself\that B 10.___sometimes keeps her awake at night___Tom is getting more and more quiet at home. A.That\which B.It\that C.Whether\what D.What\that B 11.---Do you know___Mr.Jack's address is? ---He may live at No.25 or No.52 of Changan Street.I'm not sure of____. A.where\which B.what\which C.where\what D.what\where

形式主语的四种句型

形式主语的四种句型作为英语语法中重要的概念之一，形式主语在句子中所起的作用不可小觑。

它通常指代作为主语的一些短语，以便避免出现复杂的结构和重复过多的词语。

在句子中，形式主语的位置一般放在句首，可以是it，there，what以及whether。

接下来，我们将详细介绍四种典型的形式主语句型，并举例说明它们在日常交际中的应用。

一、以it为形式主语的句型1. It + be + 形容词 + (for someone) + to do something这种句型用于表达特定行为或事物对某人来说是容易或困难的，常用形容词有easy/hard, important/unimportant, convenient/inconvenient等。

例如：It is important for us to learn English well.(It 对应的是后面的不定式短语“to learn English well”)It is inconvenient for him to come here by bus.2. It + be + 名词 + to do something这种句型强调所作的行为或事情的性质和特点，常用名词有fact, truth,pity, shame, joy等。

例如：It is a fact that smoking is harmful to health.It is a shame to refuse help from a friend in need.3. It + be + 形容词 + that从句这种句型用于表达一种事实或假设情况的存在，以及所涉及的具体内容或状态，常用形容词有clear, evident, strange等。

例如：It is strange that he doesn't like chocolate.It is clear that the Internet has greatly changed our life.二、以there为形式主语的句型1. There + be + 名词 + (地点状语)这种句型常用于描述物品、人员、场所等存在的情况，常用名词有book, pen, people, hospital, school等。

“It”作形式主语和形式宾语用法详解

新希望英语语法精讲——-———“It"作形式主语和形式宾语“It”作形式主语和形式宾语的用法详解It作形式主语和形式宾语用法，是英语学习的主要语法项目之一。

无论是单项选择，还是完行填空，it 用法始终是反复考查的重、热点之一。

现将it在特殊句型中作形式主语和形式宾语用法，进行如下归纳分析，以供学习参考。

一、It 用作形式主语当不定式（短语）、动名词（短语）或从句在某个句子中作主语时，为保持句子结构前后平衡，避免头重脚轻，因此常用it作形式主语置于句首，而将真正的主语放在句尾。

此时it只起先行引导作用，本身无词义。

e.g. It is wrong to tell a lie. （说谎是错误的。

) 〔It为to tell a lie的形式主语〕It is no use arguing about it. (争吵是没用的.）〔It为arguing about it的形式主语〕It is uncertain who will come. (谁要来还不确定。

）〔It为who will come的形式主语〕It 作形式主语的常见句型:①It + be + 形容词+ to do sth. / doing / that ….e。

g。

It is very important to learn a foreign language. (学一门外语非常重要.)It is useless crying over the spilt milk。

(覆水难收。

)It was really surprising that she married a man like that。

（她嫁给那样的男士真让人惊讶。

）②It + be +名词词组+ doing / that …。

e。

g。

It is no good telling lies. （撒谎没好处。

)It is a pity that you didn’t go to see the film yesterday。

英语中宾语从句用法及例句总结(完整)

宾语从句用法及其例句宾语从句用法时态：1.主句用一般现在时，从句可用任意时态。

2.主句用过去时，从句用过去某个时态。

3.主句用过去时，从句是客观真理时，只用一般现在时。

一、宾语从句的连接词从属连词连接宾语从句的从属连词主要有that,if,whether.that引导表示陈述句的宾语从句,if和whether引导表示“是否”的一般疑问句的宾语从句.He told me (that he would) go to the college the next year他告诉我他明年上大学.I don’t know if there will be a bus any more.我不知道是否还会有公交车.Nobody knew whether he could pass the exam.没人知道他是否会通过考试.连接代词连接代词主要有who, whom ,whose ,what ,whoever ,whomever ,wh osever, whatever, whichever等.连接代词一般指疑问,但what, whatever除了指疑问外,也可以指陈述.Do you know who has won Red Alert game?你知道是谁赢得了红色警报的游戏？The book will show you what the best CEOs should know.这本书会告诉你最好的执行总裁该了解些什么.Have you determined whichever you should buy,a Motorola or Noki a cell phone?你决定好是买诺基亚还是摩托罗拉的电话了吗?连接副词连接副词主要有when,where,why,how,whenever,wherever,however 等.He didn’t tell me when we should meet again.他没有告诉我什么时候我们能再见面.Could you please tell me how you use the new panel?你能告诉我怎么用这个新的操作盘吗?None of us knows where these new parts can be bought.没有人知道这些的新的零件能在哪里买到.二、动词的宾语从句大多数动词都可以带宾语从句We all expect that they will win , for members of their team are stro nger.我们都预料他们会赢,因为他们的队员更强壮.He told us that they would help us through the whole work.他告诉我们在整个工作中,他们都会帮忙的.部分“动词+副词”结构也可以带宾语从句I have found out that all the tickets for the concert have been sold out.我发现这场音乐会的所有票都卖光了.Can you work out how much we will spend during the trip?你能计算出这次旅行我们将花费多少钱吗?动词短语也可以带宾语从句常见的这些词有:make sure确保make up one’s mind下决心 keep in mind牢记Make sure that there are no mistakes in your papers before you tur n them in.在上交试卷前确保没有任何错误.可运用形式宾语it代替的宾语从句①动词find,feel,consider,make,believe等后面有宾语补足语的时候,则需要用it做形式宾语而将that宾语从句后置.I think it necessary that we take plenty of hot water every day .我认为每天多喝开水是有必要的.I feel it a pity that I haven’t been to the get-together.我没去聚会,感觉非常遗憾.I have made it a rule that I keep diaries.我每天写日记成了习惯.We all find it important that we (should) make a quick decision abo ut this mater.我们都认为对这件事马上做出决定很重要.②有些动词带宾语从句时需要在宾语与从句前加it这类动词主要有:hate, take , owe, have, see to.I hate it when they with their mouths full of food.我讨厌他们满嘴食物时说话.He will have it that our plan is really practical.他会认为我们的计划确实可行.We take it that you will agree with us.我们认为你会同意我们的.When you start the engine, you must see to it that car is in neutral.开启发动机时, 一定要使汽车的离合器处于空挡位置.③若宾语从句是wh-类,则不可用it代替We all consider what you said to be unbelievable.我们都认为你所说的是不可信的.We discovered what we had learned to be valuable.我们发现我们所学到的东西都是有用的.三、介词的宾语从句用wh-类的介词宾语从句We are talking about whether we admit students into our club.我们正在讨论是否让学生加入我们的俱乐部.The new book is about how Shenzhou 6 manned spaceship was se nt up into space.这本新书是关于神州6号载人航天飞船是如何升入太空的.用that,if引导的介词宾语从句有时候except,but,besides三个介词后可见到that引导的宾语从句I know nothing about my new neighbor except that he used to work with a company.对于我的新邻居我只知道他曾在一家公司上班,其他一无所知.四、形容词的宾语从句常用来引导宾语从句的形容词有: sure,certain,glad,please,happy,sor ry,afraid,satisfied,surprisedI am sure I will pass the exam.我确信我会通过考试.I am sorry that I have troubled you so long.很抱歉我这么长时间在打扰你.He is glad that Li Ming went to see him when he was ill.他很高兴在他生病的时候李明能去看望他.五、if,whether在宾语从句中的区别① if和whether在作“是否”解时,引导宾语从句常放在动词know,ask,c are,wonder,find out等之后,介词后一般不用if②少数动词,如:leave,put,discuss,doubt后的宾语从句常用whether.③ whether后可以加or not,但是if不可以.④在不定式前只能用whether.（如：I can’t decide whether to stay. 我不能决定是否留下。

whether和if的区别

whether和if的区别一、相同之处1．whether和if表示“是否”时，都能引导宾语从句，这时两者可以互换，常置于see，ask，learn，tell，wonder，doubt，find out等动词之后。

如：He asked me whether/if I could help him. 他问我是否我能帮他。

I want to know whether/if he lives there. 我想知道他是否住在那里。

We don’t know whether/if we should go or stay. 我们不知道我们是否该走还是待着。

2．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. 我们不确定玛丽是否会来。

二、不同之处1．whether可置于句首引导主语从句，而if不能；但如果是it作形式主语，则主语从句中可以用if。

如：Whether he will come is not certain. =It is not certain if/whether he will come.他是否会来是不确定的。

（it作形式主语，则后面的从句中可以用if）2．在宾语从句中，如果从句中有or not时，分两种情况：当whether与or not连成一个词组时，whether不可换用if。

She asked me whether or not I could finish the task in a day. 她问我是否能在一天之内完成这项任务。

I don’t know whether or not they will come for our help. 我不知道他们是否会来帮我们。

3．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 enough effort.成功取决于我们是否做了足够的努力。

语法whether与if的pk

语法whether与if的pk在名词性从句（如主语从句，宾语从句，表语从句）使用中我们有两个引导词的意思都解释为是否，它们就是whether和if。

很多同学会搞不清楚它们的用法，既然意思一样，那么用法是否完全一样呢？当然不完全一样！！今天，老师就给大家一个简单的口诀，让大家记住它们的用法区别~~首先，我们先给这两个引导词加上性别：if是女的，whether是男的。

一般而言，男的胆子都比较大，所以遇到如下困难和危险都是它勇往直前！“前有介be狼，后有不定虎，位句首，加是否。

”这个口诀十分短小精悍，我想大家应该都会觉得朗朗上口吧！那么，听老师来分析一下这四句话到底是什么意思吧~前有介be狼：介词和be动词之后只能用whether，不能用if！e.g. It depends on whether he will come or not.(此句中on为介词，所以后只能加whether，whether引导宾语从句）e.g. The problem is whether it will be sunny tomorrow.(此句中is为be动词，只能用whether,这里whether引导表语从句）后有不定虎：后有不定式，前面只能用whether，不能用if！e.g. He has not decided whether to go or not.(to go是动词不定式，前面只能用whether，whether引导宾语从句）位句首：放句首只能用whether，不能用if！e.g. Whether he will go to the party is not sure.(whether放句首，if不能放句首，这里whether引导主语从句）加是否：后接or not，前面只能用whether，不能用if！e.g. Mary has not decided whether or not she will go to see her friends off at the airport.(whether后可接or not，if不可，这里whether引导宾语从句）大家都清楚了吗？？这个口诀一定要背出来哦，这样碰到whether和if的题目就不会出错啦！那我们来做几道题目试试吧~用whether或if填空：1. She asked Tom ______he would come the next day.2. Linda is interested in the movie, but she cannot decide _____ she will go to see it tomorrow.3. ______he will come to the meeting is not known.4. He is not sure ________to go to the library or go to the classroom.5. They have not agreed on ______ they will hold the second meeting or not.。

whether和if引导的从句

whether与if一、相同之处。

1. whether和if常置于see, ask, say, learn, tell, wonder, doubt, find out, be uncertain/doubtful/be not known等动词之后引导宾语从句，通常可以互相替换，口语中多用if代替whether。

在非正式的写作中，可以使用if 或 whether 两个词来表达不定性，两者都算标准。

例如：We shall soon learn whether/if it is true.He asked me whether/if I could help him.I want to know whether/if he lives there.Ask if/whether he plans to come to the meeting.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/be not known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，if则不能。

如：Whether the 2000 Olympic Games will be in Beijing is not known.Whether the football game will be played depends on the weather.Whether he will come is still a question.若在句首使用形式主语 it，而将主语从句放在句末，则有时也可用 if 来引导。

【高考英语语法】名词性从句

句式精析篇
名词性从句
内容索引
·高频考点突破 ·分层综合演练
高考考什么
名词性从句是高考中的重要部分，尽管语法填空题涉及不是很多，但是其重要性不可忽视。 (1)三种形式：引导词①that ②if/whether ③what/how... (2)四种功能：宾语从句/表语从句/主语从句/同位语从句 (3)that引导宾语从句可以省略，引导其他三种从句不可省略；if只能引导宾语从句，不能引导后三种从句。连接代词what/...和连接副词when/...都可引导。 (4)that与what引导名词性从句的区别
(2021·山东省枣庄市高三二调)
④This time I was alone wandof teenage girls asked me __if_/_w_h_e_t_h_e_r__ I could pose with them for a photo.(2021·河南省平顶山市四模) ⑤No one knows how much time we have.That's ____w__h_y_____ we must live in the moment.(2021·湖南省雅礼中学高三5月质量检测)
3. 连接代词 who ， whom ， whose ， what ， which ， whoever ， whatever ， whichever 和连接副词 where，when，how，why The question is how he did it. 问题是他是如何做此事的。 That was what she did this morning on reaching the attic. 那就是她今晨上了阁楼干的。
语法脉图
高频考点突破

高考英语语法专攻-《名词性从句》-考点归纳+针对性练习

高中英语语法专攻-《名词性从句》【考点1-引导词】【考点2-主语从句】①定义：主语从句是指在复合句中充当主语的句子，它是名词的拓展，属于主语的第三个表达层次。

所以，主语从句和名词一样通常是出现在谓语动词的前面。

②主语从句的引导词：从属连词：that、whether、if（不可位于句首）连接代词：what, whatever/who, whoever/whom, whomever/whose,whosever/which,whichever连接副词：when, whenever/where,wherever/how, however/whythat引导主语从句（that无含义，在句中不作成分，不可省略）That youth is wholly experimental is known to us all。

众所周知，青春就是探索的岁月。

That she finished reading an English novel surprised us all.她读完了一部全英文小说让我们惊讶That you will win the medal seems unlikely.你赢得奖牌似乎是不可能的。

That he is still alive is a wonder.他还活着，真是奇迹。

That we shall be late is certain.我们要晚了，这是确定无疑的。

That she is still alive is a consolation.她还活着是使人感到宽慰的。

Whether引导主语从句（whether有含义“是否”，在句中不作成分，不可省）Whether she will come to the party makes no difference.她来不来参加聚会都没有关系。

It makes no difference whether/if she will come to the party.W hether he is coming or not doesn’t matter too much.他来或不来都不怎么重要It doesn’t matter too much whether he is coming or not.Who,whom, what, which,whose（连接代词）引导主语从句（连接代词有含义，在句中起名词性作用，担当一定成分）Who will be the leader of the team has not been decided yet.谁会成为这个队的领头人还没定下来。

初中英语备考-常用易混易错的单词和词组的区别用法、易错句型及短语梳理

初中英语备考-常用易混易错的单词/词组的区别用法、易错句型及短语梳理一、英语常用易混淆单词/词组的区别用法if和whether的区别用法if和whether的区别：if和whether在宾语从句中，都表“是否”，可换用，if更口语化，whether正式些。

当有or not时，一般用whether，而不用if。

1.or not放在whether之后时，只能用whether不用if。

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

注：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。

例句：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。

例句：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。

例句：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。

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

Whether it be 句式中的语法讲解学习

W h e t h e r i t b e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：20Whether 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。

whether让步状语从句

whether让步状语从句“Whether让步状语从句”是英语语法中的一个重要概念，简单来说是指在进行让步时，使用“whether”来引导一个从句来表示不管怎样，无论是否……。

在学习和使用这个从句时，要注意以下几个步骤：一、了解什么是让步状语从句在英语语法中，状语从句是在句子中用来修饰动词、形容词或副词的从句。

而让步状语从句是其中的一种，它表示即使情况是一个限制或障碍，但某件事情仍然发生了。

比如，我们可以说：“尽管下雨，我还是去了图书馆。

”在这个句子中，“尽管下雨”就是让步状语从句。

二、了解“whether”在让步状语从句中的作用在让步状语从句中，我们通常使用“whether”来引导一个从句，用来表示不管是不是这种情况，某种事情仍然发生了。

比如，我们可以说：“Whether I like it or not, I have to study for the exam.” （不管我喜不喜欢，我都得为考试学习）这里，“whether I like it or not”就是让步状语从句。

三、学会注意让步状语从句的语态和时态在让步状语从句中，通常跟着一个情态动词或者虚拟语气的动词，而这些动词的语态和时态要根据句子的语境来确定。

比如，我们可以说：“Whether he is right or wrong, he always insists on his opinion.” 这里，“is”是现在时态，表示一个现在的状况。

但是，如果我们想要表达过去的状况，就要改为过去时态，如：“Whether he was right or wrong, he alwaysinsisted on his opinion.”同样的，如果我们想要表达可能性或者建议，就要使用情态动词或者虚拟语气的动词，如：“Whether it be raining or not, we should bring an umbrella.”（不管是不是下雨，我们都应该带把伞）四、学会运用让步状语从句在写作或者口语中，让步状语从句是一个非常有效的表达方式。

高中英语语法之名词性从句

高中英语语法之名词性从句引导词主语从句主语从句可直接放在句首，也可用形式主语it代替，而将主语从句后置。

that引导的主语从句1）that引导的主语从句置于句首（that此时在从句中不充当任何成分，无含义，只起连接作用，不能省略）That the earth moves around the sun is known to all.注：从句作主语，谓语动词用单数形式。

2）在that引导的主语从句中，常用it作形式主语，that引导的真正的主语从句后置，常见的此类句型有：①It+系动词+形容词+that从句。

常用于这种结构的形容词有：necessary必要的certain明确的right正确的clear清晰的（un）likely（不）可能的possible可能的strange奇怪的obvious明显的natural自然的important重要的It is likely that he can’t come to the meeting.It is obvious that you have made a big mistake.注：Itisnecessary/important/surprising/strange/unthinkable/unbeli evable/incredible that+主语（should）+动词原形+其它。

例：It is necessary that a college student （should）master one or two foreign languages.It is strange that you （should）trust Jane.②It+系动词+名词+that从句。

常用于这种结构的名词有：a pity遗憾a honor荣耀a shame令人遗憾的事a wonder奇迹good news好消息no wonder难怪a fact事实no surprise不奇怪It is a pity that you didn’t attend the lecture yesterday. It is no wonder that you’ve achieved so much success.③It+ be+过去分词+that从句。

名词性从句

2． Whether（是否）引导 Whether it will do us harm remains to be seen．是否对我们有害还要看一看。 Whether they would support us was a problem．他们是否会支持我们还是一个问题。
3．连接代词who, whatever（无论什么）,whichever（无论哪个）,whoever（无论谁）引导 Whoever is top from wins the game when two matched players meet．两强相争勇者胜。 Whichever （of you） comes in first will receive a prize．无论（你们）谁先到都可以得奖。 Whatever you want is yours．你想要什么都是你的。
这类动词主要有:hate, take , owe, have,
我讨厌他们满嘴食物时说话.
练习
做题习惯：宾语从句的连接词和主语从句类似，做法也和主语从句类似。
1. We have made ______ clear that we will learn to deal with various difficult problems.
作业：汉译英
主语从句： 1. 他来帮助你是确实无疑的。 2. 月球上有没有生命是个有趣的问题。 3.他要跟我们说什么，还不清楚。 4. 谁能赢得这场比赛还不得而知。 5. 他没来参加这个聚会真是一个遗憾。
宾语从句： 1. 我相信他是忠诚的。 2. 一切要看我们是否有足够的钱。 3. 我相信他不会这样做。 4. 请告诉我你需要什么？ 5. 她总是在想怎样能把工作做好。
这个部分原本是特殊疑问句

英语语法高中从句语法

英语语法高中从句语法高中的英语语法是比较基础的，我们来讲一讲它的一些从句类的吧。

下面是店铺给大家整理的高中英语从句语法，供大家参阅!高中英语从句语法：同位语从句1、关联词不能省略2、从句用陈述语序从句的名词后接同位语fact, idea, word，promise, saying，problem, news常见引导词that, whether, where, how, etc.The facts that he succeeded in the experiment pleased us.An idea came to her that she might do that in another way.Scientists have argued over the problem whether there is life on other planets.高中英语从句语法：表语从句1、关联词不能省略2、从句用陈述语序常见引导词what, when, where, why, whether, how, that, because, which, What surprised me most was that he spoke English so well.The question is how what you’ve said can be put into practice.The reason (why ) he didn’t come is that he was ill.It (This , That) is because iron contains more carbon than steel.高中英语从句语法：名词从句概述一.定义: 在句中的作用相当于一个名词的从句叫做名词性从句二.分类: 名词性从句包括四类, 分别是: 主语从句, 宾语从句, 表语从句, 同位语从句三.引导词: 名词从句的引导词包括连词that / if / whether, 连接代词who / whom / whose / what / which, 连接副词when / where / how / why, 另外还有: whatever, whichever, whoever等主语从句一.定义: 在句中充当主语的从句就是主语从句二.示例:a. That he looked at me in that strange way puzzled me.b. Whether we can control the floods is still uncertain.c. What he wanted to see was an end to all the armies of the world.d. When the broadcast station will be ready is unknown.e. Who made the long distance call to him is not important.f. Whether we’ll go depends on the weather.三.应注意的问题:1.以that引导主语从句时, 常用it作形式主语, 而把真正主语后移, 如在以下句型中就是如此: It is + adj / n + that...; It is said / reported / hoped that...a. It is certain that fuels like coal and oil cause a lot of pollution.b. It was said that only three people in the world could understand it at that time.2.whether引导主语从句时, 常置于句首(此时whether不能用if 代替), 也有后移的用法 (此时whether可以用if代替)a. Whether they will come is not yet known.b. It is not yet known whether they will go there.3.连接代词who, what, which和连接副词when, where, how, why引导主语从句时, 一般不后移a. What I told you last night was really true.b. Which team will win the game is not yet known.c. How they went to the USA is still a puzzle.宾语从句一.定义: 在句中充当宾语的从句就是宾语从句. 谓语动词, 非谓语动词, 介词都可以带有宾语从句二.示例:1.谓语动词的宾语从句:a. They knew that the habit may kill them.b. She asked whether / if there were any chemist’s shops in this street.c. The teacher told them who first invented the television set.d. I want to know whose notebook is left on the table in the reading room.e. Can you tell me where the Great Pyramid is ?2.非谓语动词的宾语从句:a. Having known what he had done in school, his father was very angry.3.介词的宾语从句:a. They talked half an hour about what happened in the school.b. He is pleased with what we did yesterday.c. Leifeng always thought of how he can do more for the people.三.应注意的问题:1.句中有宾语从句且有宾补时, 通常用it作形式宾语, 而把宾语从句移到宾补后a. We think it wrong that he didn’t hel p Tom.b. I feel it possible that you will finish the work in a day.2.that从句一般不作介词的宾语, 但except等少数表示“除外”的介词除外a. I know nothing about him except that he lives next door.3.关于主句和宾语从句的时态呼应:①.如果主句是过去时, 宾语从句应是“过去”范畴的某时态a. He said he would fly to Egypt next day.b. He remembered that he had left her umbrella in the library.②.如果宾语从句表示的是客观真理或普遍现象, 可以保持“现在”范畴时态, 而不与主句时态呼应a. The teacher told us that light travels faster than sound.③.如果主句是一般现在时或一般将来时, 宾语从句根据情况选用所需要的时态4.关于宾语从句的“否定转移”: 主句的谓语动词为这些词( think, believe, expect, imagine, suppose, guess等)时, 宾语从句的否定转移到主句中去a. I don’t think he will come.b. I don’t think there are living things on the moon.表语从句一.定义: 在句中充当表语的从句就是表语从句二.示例:a. My idea is that we should help mother do house work every day.b. The question is whether we can catch the early bus.c. Nicotine! That’s what the smokers need.d. Ten years of hard work! That’s why I now look so old.同位语从句一.定义: 在一个名词或代词(如: news, fact, idea, hope, promise, problem, possibility等)后面, 对其作进一步的解释、说明的从句称为同位语从句二.示例:a. I don’t know the fact that the fireman was killed in the fire.b. I have no idea when Jack will be back.c. He can’t answer the question how he got the money.d. There is no doubt that she is fit for the job.e. The news that our team has won the game is very exciting.f. I didn’t tell mother the fact that I met with an accident on my way home.常见问题一.that引导名词从句与定语从句的区别:1.引导名词从句的that本身无词义, 只起引导作用, 在从句中并不充当任何句子成分; 而引导定语从句的that是关系代词, 有词义(指代先行词), 除了起引导作用之外, 还在从句中充当句子成分2.引导宾语从句的that可省略, 引导其他名词从句的that一般不能省略; 而引导定语从句的that如果在定语从句中充当宾语, 也可以省略a. I know that smoking does harm to people’s health. (宾语从句)b. The text tells me a fact that I have already known. (定语从句)c. The news that he had passed the examination made her parents very happy.(同位语从句)d. The news that he told me yesterday made me surprised.(定语从句)二.which引导名词从句与定语从句的区别:which引导名词从句时, 其含义是“哪一个, 哪一些”; which引导定语从句时, 指代先行词, 其含义就是先行词的意思a. There are so many beautiful caps in the shop. I really don’t know which one I should choose.(宾语从句)b. I will never forget the days which we spent in the countryside. (定语从句)三.that / what引导名词从句的区别:引导名词从句时, that本身无词义, 只起引导作用, 在从句中也不充当任何句子成分; what有词义, what引导的名词从句的含义是“…的事 / 物 (任何抽象的或具体的物) ”, what在从句中也充当一个成分a. They knew that the habit may kill them.b. What he wanted to see (“他想看到的事”)was an end to all the armies of the world.c. Nicotine! That’s what the smokers need.(“抽烟者所需要的东西”)四.引导名词从句时只用whether, 不用if的情况:1.引导主语从句时:a. Whether the 2000 Olympic Games will be held in Beijing is not known yet.2.引导表语从句时:a. The problem is whether we need it.3.引导介词后的宾语从句时:a. He was worried about whether he passed the exam.4.与or not连用时:a. It doesn’t matter whether she will come or not.5.置于不定式之前时:a. I don’t know whether to go.6.引导同位语从句时:a. The problem whether we’ll build another school hasn’t been settled.五.名词从句的语序问题: 名词从句中都要使用陈述语序, 参看前文例句2.引导表语从句时:a. The problem is whether we need it.3.引导介词后的宾语从句时:a. He was worried about whether he passed the exam.4.与or not连用时:a. It doesn’t matter whether she will come or not.5.置于不定式之前时:a. I don’t know whether to go.6.引导同位语从句时:a. The problem whether we’ll build another school hasn’t been settled高中英语从句语法：状语从句一.定义: 在句中作状语的从句就叫做状语从句二.分类: 状语从句包括以下八类1.时间状语从句: 由when, while, as, before, after, since, till / until, as soon as等引导a. I shall tell him the good news when he comes.2.原因状语从句: 由because, as, since, for等引导a. He didn’t hear me because he was listening to the radio.b. Since you are free today, you had better show me how to use the computer.3.地点状语从句: 由where等引导a. Please put the book where it was after you finish reading it.4.条件状语从句: 由if, unless等引导a. I will come to see you if I have time on Sunday.5.比较或方式状语从句: 由than, as, as if, as...as...等引导a. I know you do better than he does.b. The old worker runs very fast as if he were a young man.6.目的状语从句: 由so that, in order that等引导a. They set out early so that they could arrive at the station in good time.7.结果状语从句: 由so, so that, so / such...that...等引导a. They set out early so that they arrived at the station in good time.b. He finished his work so well that the boss praised him inpublic.8.让步状语从句: 由though / although, even if, whatever, whoever, whenever, no matter what / who等引导a. He is in very good health though he is old.b. They didn’t stop working even if it began to rain hard.三.应注意的问题:1.时间和条件状语从句中常用一般时代替将来时a. I will go and see a film if I have time tomorrow.b. I will tell the about it as soon as he comes back.c. He said he would go out for a walk when he finished his work.2.状语从句中可有省略: 在一个含有状语从句的复合句中, 如果主句和状语从句的主语相同, 或状语从句的主语是it, 并且状语从句的谓语含有be动词时, 可以将状语从句的主语和be一起省略掉a. As (she was ) a child, she began to learn English.b. If ( he was ) alive, he must be at least ninety years old.c. Although ( he was ) told to stop, he kept on working.d. If ( it is) necessary, ring me up.e. He didn’t sa y a single word until ( he was ) asked.3.as和than引导的比较状语从句中, 从句中和主句中相同的部分往往省略, 从句中只剩下比较对象a. He is a head taller than I ( am tall ).than之后的人称代词是主格或宾格时, 有时意思不同, 如:a. She likes the dog more than me.=She likes the dog more than she likes me.她喜欢狗比喜欢我更多b. She likes the dog more than I.=She likes the dog more than I like the god. 她比我更喜欢狗4.含有no sooner…than…和hardly / barely / scarcely …when…的句子相当于含有as soon as…引导的时间状语的句子. no sooner或hardly放在句首时, 主谓要部分倒装a. He had no sooner seen the policeman than he ran away. =No sooner had he seen the policeman than he ran away. =He ran away as soon as he saw the policemen.b. He had hardly sat down when the telephone rang. =Hardly had he sat down when the telephone rang. =The telephone rang as soon as he sat down.5.immediately, directly, instantly等词也可以作为连词引导时间状语从句, 相当于as soon as引导的时间状语a. I went to see him immediately I heard from him. =I went to see him as soon as I heard from him.6.the moment, the minute, the second引导时间状语从句, 相当于as soon as引导的时间状语a. He let out a cry the moment he saw the snake.=He let outa cry as soon as he saw the snake.7.each time, every time, any time, last time, next time, first time可以引导时间状语从句a. They shake hands with each other each time they meet.8.since引导的时间状语从句中, 若谓语动词是延续性动词或状态动词, 则其过去时表示动作的完成或状态的结束a. It is five years since he lived here. 他不住这里己有五年了a. They shake hands with each other each time they meet.8.since引导的时间状语从句中, 若谓语动词是延续性动词或状态动词, 则其过去时表示动作的完成或状态的结束a. It is five years since he lived here. 他不住这里己有五年了。

whether和if引导的从句

whether与if一、相同之处。

1. whether和if常置于see, ask, say, learn, tell, wonder, doubt, find out, be uncertain/doubtful/be not known等动词之后引导宾语从句，通常可以互相替换，口语中多用if代替whether。

在非正式的写作中，可以使用if 或 whether 两个词来表达不定性，两者都算标准。

例如：We shall soon learn whether/if it is true.He asked me whether/if I could help him.I want to know whether/if he lives there.Ask if/whether he plans to come to the meeting.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/be not known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，if则不能。

如：Whether the 2000 Olympic Games will be in Beijing is not known.Whether the football game will be played depends on the weather.Whether he will come is still a question.若在句首使用形式主语 it，而将主语从句放在句末，则有时也可用 if 来引导。

if和whether在宾语从句中的用法

if和whether在宾语从句中的用法
if和whether在宾语从句中都可以引导一个间接疑问句，表示疑问或询问。

但是在某些情况下，它们的用法略有不同。

1. 当宾语中的动词是be动词时，if和whether可以互换使用，例如：
- I don't know if/whether it is going to rain tomorrow.（我不知道明天是否会下雨。

）
2. 当宾语中的动词需要带有陈述语气、句子是个肯定陈述时，只能使用whether，例如：
- I asked him whether he likes ice cream.（我问他是否喜欢冰激凌。

）
- Do you know whether they are coming to the party?（你知道他们是否来参加聚会吗？）
3. 当宾语中的动词需要带有疑问语气、句子是个疑问句时，只能使用if，例如：
- I wonder if he will be here tomorrow.（我想知道他明天是否会来这里。

）
- Can you tell me if she is happy with her new job?（你能告诉我她是否对她的新工作感到满意吗？）
总的来说，if和whether在宾语从句中可以互换使用的情况比较多，但是最好根据具体语境来进行选择。

whether 主语从句

whether 主语从句Whether 主语从句是英语语法中的一个重要部分，它通常用于引导一个疑问句，用来询问某个事情是否成立或者是否正确。

在英语中，Whether 主语从句的使用非常广泛，它可以用来表达各种不同的意思和情感。

下面是一些关于 Whether 主语从句的例子：1. Whether you like it or not, you have to go to school every day.无论你喜不喜欢，你每天都得去上学。

2. Whether he will come or not is still uncertain.他是否会来还不确定。

3. Whether you believe it or not, the earth is round.无论你信不信，地球是圆的。

4. Whether we win or lose, we will always be proud of our team.无论我们赢还是输，我们都会为我们的团队感到自豪。

5. Whether she is happy or sad, she always has a smile on her face.无论她是开心还是难过，她总是面带微笑。

6. Whether it is raining or not, I will still go for a walk.无论下不下雨，我都会去散步。

7. Whether he is guilty or not, he will have to face the consequences of his actions.无论他有没有罪，他都必须面对自己行为的后果。

8. Whether you like spicy food or not, you should try this dish.无论你喜不喜欢辣的食物，你都应该尝试一下这道菜。

9. Whether you are rich or poor, you should always be kind to others.无论你富有还是贫穷，你都应该对别人友善。

宾语从句中if和whether的区别和用法

宾语从句中if和whether的区别和用法《宾语从句中if和whether的区别和用法》在英语学习的小世界里，宾语从句里的if和whether就像两个有点相似却又各有特点的小伙伴。

先来说说if这个小家伙。

if在宾语从句里，就像是一个比较随性的小助手。

它能表示“是否”的意思。

比如说，“I don't know if he will come.”（我不知道他是否会来。

）这里的if就很好地传达了一种不确定，在问他来不来这个事情。

不过呢，if这个小助手有时候也有点小脾气，它不是在所有情况下都能像在这个句子里这么自由地使用哦。

再看看whether。

whether就像是一个比较严谨的小伙伴。

它也表示“是否”，但是它比if要讲究一些。

比如说，“I wonder whetherhe is right or not.”（我想知道他是否正确。

）这里的“or not”就像是一个小尾巴，它经常跟着whether后面。

而if呢，要是后面跟着“or not”就会感觉有点别扭，就像穿了不合身的衣服一样。

像这种时候，就只能请whether出场啦。

再讲个小例子吧。

想象一下你在一个大商场里，面前有两个门。

if就像是那个没有什么特殊标记的门，大部分时候你可以从这个门进去到你想去的地方，就像在简单的宾语从句里表示“是否”。

而whether呢，就像是那个旁边有个小提示牌，写着一些特殊规则（比如能接“or not”）的门，在一些特定的情况下，你就得走这个门才能到达正确的地方。

还有哦，当我们遇到动词不定式前面的时候，就只能用whether啦。

就好比是一场特殊的比赛，这个比赛场地（动词不定式前面）只有whether有资格进入。

比如说，“I don't know whether to go or stay.”（我不知道是去还是留。

）这里要是换成if，那可就不符合比赛规则啦。

又比如说，在介词后面的时候，whether也是独挑大梁的。