主语从句 超全讲解加练习

高二年级语法要点剖析（李翌洋）一、名词性从句主语从句、表语从句、宾语从句、同位语从句，在整个句子中所起的作用，相当于一个名词。

因此，这四种从句通称为名词性从句。

引导名词性从句的连接词可分为三类：连接词：that, whether, if （不充当从句的任何成分）连接代词：what, whatever, who, whoever, whom, whose, which.连接副词：when, where, how, why1. 主语从句作句子主语的从句叫主语从句。

主语从句通常由从属连词that，whether，if 和连接代词what，who，which，whatever，whoever以及连接副词how，when，where，why等词引导。

that在句中无词义，只起连接作用；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。

例如：（1）What he wants to tell us is not clear. 他要跟我们说什么，还不清楚。

It is known to us how he became a writer. 我们都知道他是如何成为一名作家的。

Where the English evening will be held has not yet been announced.英语晚会将在哪里举行，还没有宣布。

注意：有时为避免句子头重脚轻，常用形式主语it代替主语从句作形式主语放于句首，而把主语从句置于句末。

主语从句后的谓语动词一般用单数形式。

常用句型如下：（1）It + be + 名词+ that从句（2）It + be + 形容词+ that从句（3）It + be + 动词的过去分词+ that从句（4）It + 不及物动词+ that 从句另注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时，谓语动词要用虚拟语气“(should) +do”，常用的句型有：It is necessary (important, natural, strange, etc.) that …It is a pity (a shame, no wonder, etc.) that…It is suggested (requested, proposed, desired, etc.) that…2. 宾语从句名词句用作宾语的从句叫宾语从句。

1〕从属连词：that，whether等.that 引导主语从句只起引导作用，本身无实际意义，在主语从句中不充当任何成分，但不能省略。

That he will win is certain.他肯定会赢。

Whether he’ll come here isn’t clear. 他是否会来这里还不清楚。

注意: 由that 引导的主语从句有时为了使句子结构平衡, 防止“头重脚轻”, 常用it 作形式主语, 而把从句放在后面。

例如:1. That he will refuse this piece of advice is impossible.2.That they should like each other is natural.这样就构成了下面一些常用句型:1) It is + n. +从句It is a pity/shame that... 遗憾的是……It is a surprise that…令人惊奇的是…It is a fact that… …是事实It is common knowledge that… …是常识______________(很遗憾)we lost the match._____________(这是事实)he cheated in the exam.2) It is + adj. +从句It’s certain that… 肯定…It is possible that... 很可能……It is unlikely that... 不可能……It is obvious that… 很明显…It is necessary \important \natural\... that…+(should) do________________(很可能)she will come back tomorrow.*_________________(很明显)this measure is effective.3) It +不及物动词+从句It happened that... 碰巧……It occurred to me that…我突然想起…_______________(刚好)I came into the office at that time.*____________________(我突然想起)I forget to sent the letter.4) It + be +过去分词+从句It is said that... 据说……It is known to all that... 众所周知……It is reported that... 据报道……It is believed that..人们相信/认为……It is suggested that + (should〕do... 建议……__________________(据报道)20 people were killed in the accident.*_______________(建议)we should eat more vegetable and do more exercise.2.连接代词who ，what ，which, whatever, whichever, whoever(Who, whom, which, what可以和ever构成合成词，和what一样引导从句，ever起到强调作用。

主语从句讲解练习及答案主语从句一、主语从句的连词分三类（1）从属连词引导的主语从句（that whether if）that引导的主语从句:引导词that无含·义/在句中不做成分/不可以省。

That 引导主语从句通常用it 作形式主语。

That she survived the accident is a miracle.whether有含义(是否)/在句中不做成分/不可以省。

注意：引导主语从句，不能用if不能在开头，只能用whether。

Whether she is coming or not doesn’t matter too much.（2）用连接代词引导的主语从句在由连接代词who, whose, whom, which（哪一个）, what, whoever, whomever, whichever, whatever引导的名词性从句中，其连接代词在句中起名词性作用，担当一定成分.例如Whatever we do is to serve the people.注：whatever / whoever的功用whatever = anything that; whoever = anyone who。

要注意和whatever, whoever引导的让步状语从句的区别。

如：Whoever breaks the law should be punished. （主语从句）（＝Anyone who breaks the law should be punished. ）（定语从句）Whoever breaks the law, he should be punished. （让步状语从句）（＝No matter who breaks the law, he should be punished. ）（让步状语从句）（3）用连接副词when, where, why, how引导的名词性从句(其连接副词有含义,在句中作状语。

主语从句一.概念：主语从句、表语从句、宾语从句和同位语从句在复合句中的作用相当于名词，因此这四种从句被称为名词性从句。

①主语从句名词性从句共有四种: ②表语从句③宾语从句④同位语从句我们先看几个句子：是谁开始先出招没什么大不了Who takes the first step is not a big deal.…这就是你要离开的原因That’s why you go away....告诉我今夜你想要梦什么Tell me what you want to dream of tonight.最后你会发现每个爱情都危险这个事实Finally you’ll find out the fact that every love is dangerous一．名词性从句的连词连接词：that，if/whether(是否)连接代词：what（+ever）, who(+ever), whom(+ever) , which(+ever), whose连接副词：when, where, how, why, whenever, wherever, however二、主语从句的连词分三类（1）从属连词引导的主语从句（that whether if）that引导的主语从句:引导词that无含义/在句中不做成分/不可以省。

That 引导主语从句通常用it 作形式主语。

例如：That you will win the medal seems unlikely.That you are so indifferent bothers（使…恼怒）me.That she survived the accident is a miracle.（奇迹）whether 引导的主语从句: whether有含义(是否)/在句中不做成分/不可以省。

注意：引导主语从句，在开头不能用if，只能用whether。

Whether we will hold a party in the open air tomorrow depends on the weather.Whether she is coming or not doesn’t matter too much.It’s uncertain whether/if he will come. {不是在句首}（2）用连接代词引导的主语从句在由连接代词what（+ever）, who(+ever), whom(+ever) , which(+ever), whose引导的名词性从句中，其连接代词在句中起名词性作用，担当一定成分.例如：What you need is more practice.What I want to know is this.Whatever we do is to serve the people.注：whatever / whoever的功用whatever, whoever在主语从句中不含疑问意义。

主语从句一、概述：在句子中起名词作用的各种从句统称为名词性从句。

根据它们在句中的语法作用，这类从句又可分为主语从句、同位语从句、表语从句和宾语从句。

二.主语从句主要有四类：（1）由连词that引导的主语从句:引导词that无含义/在句中不做成分/不可以省。

例如：That you will win the medal seems unlikely.That you are so indifferent bothers me.That she survived the accident is a miracle.（2）用连词whether引导的主语从句:whether有含义(是否)/在句中不做成分/不可以省。

注意：引导主语从句，不能用if，只能用whether。

例如：Whether we will hold a party in the open air tomorrow depends on the weather.Whether she is coming or not doesn’t matter too much.（3）用连接代词引导的主语从句在由连接代词who,whose,whom,which,what,whoever,whomever,whichever,whatever 引导的名词性从句中，其连接代词在句中起名词性作用，担当一定成分.例如：What you need is more practice.What I want to know is this.Whatever we do is to serve the people.注：whatever/whoever的功用whatever,whoever在主语从句中不含疑问意义。

它引导主语从句，并在从句中作主语、宾语、表语等。

whatever=anything that;whoever=anyone who。

要注意和whatever,whoever引导的让步状语从句的区别。

主语从句练习（共五篇）第一篇：主语从句练习主语从句讲解及练习主语从句一、概述：在句子中起名词作用的各种从句统称为名词性从句。

根据它们在句中的语法作用，这类从句又可分为主语从句、同位语从句、表语从句和宾语从句。

二.主语从句主要有三类：（1）由连词that引导的主语从句:引导词that无含义,在句中不做成分,不可以省。

例如：That you will win the medal seems unlikely.你想获得奖牌看起来是不可能的。

That you are so indifferent bothers me.你如此冷淡使我很烦恼。

That she survived the accident is a miracle.她在事故中幸免于难简直是奇迹。

（2）用连词whether 引导的主语从句:whether有含义(是否),在句中不做成分,不可以省。

例如：Whether she is coming or not doesn’t matter too much.她来不来都无关紧要。

（3）用连接代词引导的主语从句(在由连接代词who, whose, whom, which, what, whoever, whomever, whichever, whatever引导的名词性从句中，其连接代词在句中起名词性作用，担当一定成分).例如：What you need is more practice.你所需要的是更多的训练。

What I want to know is this.我想知道的就是这事。

Whatever we do is to serve the people.我们无论做什么都是为人民服务。

（4）连接副词when, where, why, how引导的名词性从句(其连接副词有含义,在句中作状语。

)eg:Where we should leave it is a problem.When they will come hasn’t been made pubic.他们什么时候来还不知道。

主语从句讲解及练习语从句主语从句(Subject Clause)定义:在复合句中充当主语的句子叫做主语从句.第一部分：常规主语从句，即句子在复合句中充当一个主语主语从句的时态：不受主句的时态影响和限制。

（1）That he finished writing the composition in such a short time surprised us all.（2）Whether we will go for an outing tomorrow remains unknown.（3）Who will be our monitor hasn't been decided yet.（4）Whom we must study for is a question of great importance.（5）What caused the accident remains unknown.（6）Whatever you did is right.（7）Whose watch was lost is unknown.（8）What we need is time.（9）What we need are good doctors.小结:（1)引导主语从句连词有that,whether,who,what,whatever 等（2)连词位于句首不能省略（3)主语从句大多数情况下视为三单,但也有例外,如例9 第二部分：为了防止句子头重脚轻，通常把形式主语it 放在主语位置，真正主语搁置于句末（1）It is certain that he will win the match.（2）It is true that he has made a very important discovery in chemistry.（3）It is very likely that they will hold a meeting.（4）It is strange that he should do that.（5）It is important that we all should attend the meeting.（6）It is strange that the man should have stuck to his silly ideas.（7）It is a pity that we won't be able to go to the south to spend our summer vacation.（8）It is still a mystery what caused the accident.（9）It is said that he has gone to shanghai.(=He is said to have gone to shanghai)（10）It is known to all that the gun powder was first invented by the Chinese.（11）It is suggested that the work should be done with great care.（12）It seems that he has seen the film.(=He seems to have seen the film)（13）It happened that the two cheats were there. (=The two cheats happened to be there)小结:（1)以that 引出的主语从句,常以形式主语it引导. It is +形容词/名词/某些动词ed + that 从句.（2) 在有些that从句中要用虚拟语气(should+do/should+have done)例句4,5,6,11.主语从句与宾语从句两者的用法和在句中的作用是不同的，下面从它们的各自用法，介绍：）~一．主语从句主语从句定义:在句子中担当主语的是一个从句,这个从句就叫做主语从句。

高考英语主语从句定义：用作主语的从句叫主语从句，它是名词性从句之一。

主语从句的时态：不受主句的时态影响和限制。

引导主语从句的连接词有：从属连词: that, whether；连接代词: who (whoever), whom, whose, what (whatever)和which (whichever)；连接副词: when, where, how和why。

连接词：1. 从属连词：that，whether1）that引导主语从句只起引导作用，在主语从句中不充当任何成分，that本身无实际意义，但不能省略。

2）whether意为“是否”，放在句首句末皆可。

由whether引导的名词从句做主语，表语，介词宾语，同位语时！不可用if代替。

a.That price will go up is certain.b. Whether they would support us was a problem. 他们是否会支持我们还是一个问题。

2. 连接代词who ，what ，which, whatever, whichever, whoever (Who, whom, which, what 可以和ever构成合成词，和what一样引导从句，ever起到强调作用。

此类主语从句不能用形式主语it引导，它们在句子中担任成分，不能省略，语序为陈述语序，既有疑问含义,又起连接作用,同时在从句中充当各种成分。

Which side will win is not clear. Whoever breaks the law will be punished.Whatever he did is right. Who killed the scientist remains a question.1）What和that引导的主语从句的区别：that 只起引导作用，不充当任何成分，没有意思。

What 不仅起引导作用，还要充当一定成分(主语、宾语或表语)，意思是：“什么”。

主语从句讲解及练习主语从句一、概述：在句子中起名词作用的各种从句统称为名词性从句。

根据它们在句中的语法作用，这类从句又可分为主语从句、同位语从句、表语从句和宾语从句。

二.主语从句主要有三类：（1）由连词that引导的主语从句:引导词that无含义,在句中不做成分,不可以省。

例如：That you will win the medal seems unlikely.你想获得奖牌看起来是不可能的。

That you are so indifferent bothers me.你如此冷淡使我很烦恼。

That she survived the accident is a miracle.她在事故中幸免于难简直是奇迹。

（2）用连词whether 引导的主语从句:whether有含义(是否),在句中不做成分,不可以省。

例如：Whether she is coming or not doesn’t matter too much.她来不来都无关紧要。

（3）用连接代词引导的主语从句(在由连接代词who, whose, whom, which, what, whoever, whomever, whichever, whatever引导的名词性从句中，其连接代词在句中起名词性作用，担当一定成分).例如：What you need is more practice.你所需要的是更多的训练。

What I want to know is this. 我想知道的就是这事。

Whatever we do is to serve the people.我们无论做什么都是为人民服务。

（4）连接副词when, where, why, how引导的名词性从句(其连接副词有含义,在句中作状语。

)eg:Where we should leave it is a problem.When they will come hasn’t been made pubic.他们什么时候来还不知道。

主语从句一、名词性从句概述：在句子中起名词作用的句子叫名词性从句(Noun Clauses）。

名词性从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。

名词性从句的连词连接词：that，if/whether(是否)，连接代词：what, whatever, who, whoever, whom, whomever, whose, which, whichever连接副词：when, where, how, why, whenever, wherever, however辨别下列名词性从句的类别：1.How the book will sell depends on its author.2.John said that he was leaving for London on Wednesday.3.The fact is that he has not been seen recently.4.The fact that he has not been seen recently disturbs everyone in his office.5.He will talk to us about what he saw in U.S.6.It is impossible that I go and attend the meeting.二、主语从句的连词分三类（1）从属连词引导的主语从句（that whether if）that引导的主语从句:引导词that无含义/在句中不做成分/不可以省。

That 引导主语从句通常用it 作形式主语。

例如：That you will win the medal seems unlikely.That you are so indifferent bothers me.That she survived the accident is a miracle.whether 引导的主语从句: whether有含义(是否)/在句中不做成分/不可以省。

主语从句详细讲解及综合练习（4）It is/was +过去分词+that 从句It’s not known that………不得而知It’s said that…据说……It’s reported that…据报道……It’s decided that…尚未决定It’s believed that…据认为……It’s announced that…据宣布……It suddenly struck me (occur to me that…我突然想到（感觉到）……（5）其他It doesn’t matter …是无关紧要的It makes no difference …毫无区别……It is of little consequence that…无关紧要It is a pity __________ she has made such a mistake. 她犯这样的错误是令人遗憾的事。

It's strange __________ he didn't come yesterday. 他昨天没来是很奇怪的。

It is reported __________ the number of wild animals in Africa is decreasing.据报导非洲野生动物的数量正在减少。

It is said __________ there was a terrible plane crash this morning.据说今天早上有一起可怕的飞机坠毁事故。

1）主语从句在句首时，必须由连注意:接词引导，不能省略这些连接词；但是如果用it做形式主语，而把主语从句放在句末时，从属连词that可以省略。

误：They should like each other is natural.正：That they should like each other is natural.正：It is natural that they should like each other.2)如果主语从句放在句首，不能用if引导，但是如果用it 做形式主语，而把主语从句放在句末时，也可以用if引导.误：If Mary really heard him is really doubtful.正：It was doubtful if Mary really heard him.4) . 用于It is important / natural / necessary / impossible that...句型中, 主语从句应使用虚拟语气, 谓语动词用\“should + 动词原形\”的形式, should有时可以省略。

主语从句一、概述：在句子中起名词作用的各种从句统称为名词性从句。

依据它们在句中的语法作用，这类从句又可分为主语从句、同位语从句、表语从句和宾语从句。

二.主语从句主要有四类：（1）由连词that引导的主语从句:引导词that无含义/在句中不做成分/不行以省。

例如：That you will win the medal seems unlikely.That you are so indifferent bothers me.That she survived the accident is a miracle.（2）用连词 whether 引导的主语从句: whether有含义(是否)/在句中不做成分/不行以省。

留意：引导主语从句，不能用if，只能用whether。

例如：Whether we will hold a party in the open air tomorrow depends on the weather.Whether she is coming or not doesn’t matter too much.（3）用连接代词引导的主语从句在由连接代词who, whose, whom, which, what, whoever, whomever, whichever, whatever引导的名词性从句中，其连接代词在句中起名词性作用，担当确定成分.例如：What you need is more practice.What I want to know is this.Whatever we do is to serve the people.注：whatever / whoever的功用whatever, whoever在主语从句中不含疑问意义。

它引导主语从句，并在从句中作主语、宾语、表语等。

whatever = anything that; whoever = anyone who。