名词性从句之主语从句（ppt课件）-2025届高三英语上学期一轮复习专项.pptx

1、主语从句主语从句，即在复合句中充当主语成分的句子，例如That he finished writing the composition in such a short time surprised us all，他在很短的时间内写完作文让我们都很惊讶，此复合句主要描述的是某事让我们惊讶，某事就是该复合句的主语，因此“That he finished writing the composition in such a short time”便是该复合句的主语从句。引导主语从句的连接词主要有：从属连词：that whether 连接代词：who whoever whom whose what wh

2、atever which whichever 连接副词：when where how why1.that引导 That he is still alive is a wonder.That we shall be late is certain.That he should have ignored the working class was natural.他忽视工人阶级是很自然的。That she is still alive is a consolation.*引导词that有时可以省略，有时则不能，若that引导的主语从句直接位于句首，则that不能省略，若that引导的主语从句位于句

3、末，而在句首使用了形式主语it，则that可以省略：That you didnt go to the party was a pity.It was a pity(that)you didnt go to the party.很遗憾你没去派对。她成为画家可能是受她父亲的影响。That you are coming to London is the best news I have heard this long time.That she became an artist may have been due to her fathers influence.你将来伦敦是好久以来我听到的最好消息

4、。她被挑选上，在她村 子里引起很大轰动。That she was chosen made a tremendous stir in her village.他还活着是一种安慰。That he is still alive is a consolation.地球绕着太阳转，这是众所周知的。It is know to us all that the earth turns around the sun.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 prob

5、lem.他们是否会支持我们还是一个问题。2.whether引导这对我们是好是坏还要拭目以待。Whether it will do us harm or good remains to be seen.他是否去那里还没有被决定。Whether he will go there has not been decided.他有没有去那里还没有被告知。Whether he has gone there has not been told yet.3.连接代词what引导 What I want to know is this.我想知道的就是这一点。Whats done is done.事已成定局。Wh

6、at he says is not important.What I am telling you is mere impressions.What make the river more beautiful are the lotus plants growing in the water.What you need is a good-sized canvas bag.What I am afraid of is their taking him to Portugal.What struck me was that they have all suffered a lot.What ca

7、used the accident remains unknown.4.连接代词who,whoever,whom,whose Who will be our monitor hasnt been decided yet.Whoever is at the top wins the game when two matched players meet.两强相争勇者胜。Whom we must study for is a question of great importance.Whom the watch belongs to is unknown.谁的手碰着地面谁就输。无论你做什么都是对的。

8、Whose hand touches the ground is the loser.我们需要的是钱。What we need is moneyWhatever you did is right.我们应该坐哪辆车是最重要的事情。Which car we should take is the most important thing.(你们)谁先到谁得奖。Whichever(of you)comes in first will receive a prize.Which,whichever引导你要哪个哪个就是你的。练习：Whichever you want is yours.对有些人来说似乎简单

9、的事情对另外一些人来说可能是困难的。What seems easy to some people may be difficult to other people.连接副词引导 when,how,where,why什么时候到没有关系。When we arrive doesnt matter.会议什么时候开还没有定。When the meeting will be held has not been decided.这件事怎样发生的，谁也不清楚。How this happened is not clear to anyone.我们要去哪里还没有定下来。Where we will go haven

10、t been decided yet.我在哪里过暑假不关你的事。Where I spend my summer is none of your business.练习：这是怎样做的是一个谜。How it was done was a mystery.这件事怎样发生的，谁也不清楚。How this happened is not clear to anyone.邀请多少人还是一个问题。How many people we are to invite is still a question.哪匹马先到哪匹马赢。Whichever horse comes in first wins.她要去的地方是曼

11、彻斯特。Where she went was Manchester.主语从句与形式主语主语从句与形式主语it有时为了考虑句子平衡，通常在主语从句处使用形式主语it，而将真正的主语从句移至句末，分以下情况：1.对于以连词that引导的主语从句，通常用形式主语it代替主语从句：(1)It+be+形容词+that 从句It is important that he should know about this.他必须知道此事。Its vital that we be present.我们出席是至关重要的。It is essential that a meeting be convened this

12、week.本周开一次会非常重要。It is appropriate that this tax be abolished.Its unfair that so many people should lose their jobs.Its amazing that she should have said nothing about it.Its unthinkable that they should deny my request.(2)It+be+名词+that 从句Its a pity that he didnt come.(3)It+be+动词的过去分词+that 从句It was i

13、ntended that you be the candidate.大家的意图是让你当候选人。（4）it 不及物动词+主语从句It was where I grew up,and so it follows that it must be a place that at least partly shaped who I am today.对于以连接代词(副词)引导的主语从句，可以使用形式主语代主语从句，也可直接在句首使用主语从句：Whether they would support us was a problem.It was a problem whether they would su

14、pport us.Whether it will do us harm remains to be seen.It remains to be seen whether it will do us harm or good.例句：That they should refuse to sign the petition required great courage.It required great courage that they should refuse to sign the petition.对关系代词型what引导的主语从句，通常直接将主语从句放在句首。如：What we need

15、 is money.我们需要的是钱。What I want to know is this.我想知道的就是这一点。有时也可将助用形式主语。如：It is clear enough what he meant.他是什么意思很清楚。如果句子是疑问句，则必须用带形式主语it的结构：Is it true that he is the girls father?他是那女孩的父亲，是真的吗？How is it that you are late again?你怎么又迟到了？主语从句中it 做形式主语常见的固定结构有四钟：It be+名词+从句 It be+形容词+从句 It be+动词过去式+从句 It+

16、不及物动词+从句常见的it做形式主语的主语从句句型：It is said that.据说 It is reported that.据报导 It is well known that.众所周知 It is announced that.据宣布 It is believed that.人们相信 It is thought that.人们认为 It is understood that.自不待言 It must be pointed out that.必须指出 It must be admitted that.必须承认 It turned out that 结果是.It has been prove

17、d that 被证实是.It must be proved that 必须指出 It happened/occurred that 碰巧.It is well-known that 有名.It is a fact that 事实是 It is an honor that 非常荣幸 It is common knowledge that 是常识 It is natural that 很自然 It is strange that 奇怪的是 It seems that 似乎 It is necessary that 有必要 It is clear that 很清楚 It is likely that

18、 很可能 It is important that 重要的是 It seems that 好像是 It follows that 由此可见注意：wh-ever既可以引导让步状语从句，也可以引导主语从句，怎么区分？准确的句子成分解析。Whoever breaks the law deserves a fine.Whoever breaks the law,he or she deserves a fine.主语从句 谓 宾让步状语从句 主 谓 宾随堂检测：1._ makes mistakes must correct them.A.What B.That C.Whoever D.Whatever

19、2.It worried her a bit _ her hair was turning grey.A.while B.that C.if D.for3.When and why he came here _ yet.A.is not known B.are not known C.has not known D.have not knownCBA4._ is no reason for dismissing her.A.Because she was a few minutes late B.Owing to a few minutes lateC.That she was a few m

20、inutes late D.That Being a few minutes late5._ Tom liked to eat was different from _.A.Thatthat you had expected B.What that you had expectedC.Thatwhat you had expected D.Whatwhat you had expected6._ we go swimming every day _ us a lot of goodA.If.do B.That.do C.If.does D.That.doesCDD7.It _ Bob driv

21、es badly.A.thinks that B.is thought what C.thought that D.is thought that8.Its uncertain _ the experiment is worth doing.A.if B.that C.whether D.how9._ the boy didnt take medicine made his mother angry.A.That B.What C.How D.Which10._ we cant get seems better than _ we have.A.What,what B.What,that C.

22、That,that D.That,whatDCDD11._ you dont like him is none of my business.A.What B.Who C.That D.Whether12._ well go camping tomorrow depends on the weather.A.If B.Whether C.That D.Where13._is going to do the job will be decided by the Party committee.A.That B.Why C.How D.Who14._well finish translating

23、the book depends on the time.A.When B.Why C.What D.That15._he wont go there is clear to all of us.A.How B.What C.Why D.ThisCBDAC16._the house will be built will be discussed at tomorrows meeting.A.If B.Where C.That D.What17._you come or not is up to you.A.What B.If C.Why D.Whether18._makes mistakes must correct them.A.Who B.Anyone C.Whoever D.Anybody19._team will win the match is a matter of public concern.A.Which B.That C.If D.How20._leaves the room last ought to turn off the lights.A.Anyone B.The person C.Whoever D.WhoBDCACthat,whether/if在名词性从句中