公开课--主语从句讲解练习及答案
主语从句讲解及练习
主语从句讲解及练习主语从句（一）主语从句的标记主语从句通常由连词that和whether (if)、连接代词或连接副词以及关系代词型what引导。
1. that引导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 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. 她还活着是使人感到宽慰的。
That she became an artist may have been due to her father’s influence. 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. 你将来伦敦是好久以来我听到的最好消息。
That she was chosen made a tremendous stir in her village. 她被挑选上，在她村子里引起很大轰动。
2. whether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. 连接代词引导Whoever(=anyone who) fails to see this will make a big blunder. Whatever(=anything that) she did was reasonable. 无论什么Anything that she did was reasonable.Whichever (of you) comes in first will receive a prize. 无论(你们)谁先到都可以得奖。
主语从句讲解及练习
主语从句讲解及练习什么是主语从句？主语从句是由一个从句充当主语的句子结构，它由连接词引导，用来说明主语的内容或者起到引入主题的作用。
主语从句的引导词一般情况下，主语从句由以下连接词引导：- that- whether/if- who/whom- which- what- whatever- whoever- whichever主语从句的用法主语从句在句子中承担主语的角色，可以帮助我们表达某个动作、状态、事件或者事实的主题。
下面是一些常见的用法示例：1. 表达事实或真理：例如：That he is innocent is beyond doubt.（他的无辜是毫无疑问的。
）2. 表达感觉或观点：例如：What he said is very interesting.（他说的话很有趣。
）3. 引导宾语从句：例如：I believe that he will succeed.（我相信他会成功。
）主语从句的位置一般情况下，主语从句位于句首或者句中，具体位置取决于句子的结构和语境。
主语从句的练题请根据下面的句子，填写合适的主语从句：1. __________ you did yesterday surprised everyone.（你昨天做的事让大家都吃惊。
）2. __________ will happen remains unknown.（将会发生什么还不确定。
）3. __________ is important to study hard.（努力研究是很重要的。
）5. __________ we need is more time.（我们所需要的是更多的时间。
）参考答案：1. What2. What3. It4. Whether/if5. What以上是对主语从句的讲解及练习，希望对你的学习有所帮助。
主语从句超全讲解加练习
主语从句的规律 ：
例4. That whether he will help others is a fact.
正：That he will help others is a fact.
规律四、主语从句中的连词不能重叠使用.
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主语从句的规律 ： 例5. When he will come are a puzzle. 正：When he will come is a puzzle.
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3连接副词when,where, how, why等.
Why they suddenly disappeared still remains a mystery. When they will leave is not decided. Where she is from is unknown. How we will paint the house has not been decided.
规律五、含主语从句的主句谓语动词多用 单数第三人称形式.
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主语从句的规律 ：
1. What he needs is that book.
2. What he needs are some books.
规律六、what 引导的主语从句,可根据 表语决定主句动词的单复数形式.
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注意: 由that 引导的主语从句有时为了使句
子结构平衡, 避免 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. __I_t _is__im__p_o_s_s_i_b_le__th_a_t_h__e_w_i_ll_r_e_f_u_s_e_t_h_i_s_p_i_e_c_e __o_f_a_d_v_i_c_e_._____________________________
主语从句超全讲解加练习
误:ＩfMaryrｅａllyｈｅaｒdhimis reallyｄoubｔｆul.
正: Wｈｅｔｈer Marｙrｅaｌlyheａrdhｉｍｉsｒｅａlly dｏubtful.
Cｏmpｌeｔetheｓｅntｅnｃｅs usｉng whａt, wheｔhｅr,ｗｈere,wheｎ, whｏ,ｗｈｙ, hｏwｏr tｈａt.
Wｈｅnｔhey wｉlllｅａvｅiｓ ｎoｔｄecided.
Howwewillpaint thehousｅhasnｏｔbeｅｎdecｉdeｄ.
注意:
1)主语从句在句首时，必须由连接词引导,不能省略这些连接词
误:Ｔｈey should lｉｋe eaｃh other isｎatｕrａl.
正：Ｔhａt thｅyshｏuld like each othｅrｉsnａtuｒal
(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。它们在句子中担任主干成分，并用陈述句形式)
What mａnｙ ｓcｉentiｓｔsｂｅlieve istｈaｔtｈe eartｈiｓrｏunｄ…
Whoｗｉｌl taｋｅpaｒｔin theｍeeting haｓｎoｔbｅen deｃidｅｄ.
Ｉt iｓobｖiｏus thａｔ…很明显…
Iｔ ｉs necｅssary＼ｉｍｐｏrtaｎｔ\natuｒaｌ\..．tｈat…+(sｈｏulｄ)do
_＿__＿_＿_＿__＿＿__＿（很可能）shｅwillcｏme bacｋtomorrow.
*＿__＿＿_＿__＿_____＿＿(很明显)ｔhiｓmeａsurｅiｓeffectiｖｅ.
高中英语公开课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, 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. ）Whoever breaks the law, he should be punished. （让步状语从句）（＝No matter who breaks the law, he should be punished. ）（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。
)例如:Where we should leave it is a problem.When they will come hasn’t been made pubic.三、it 作形式主语的主语从句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。
高中主语从句讲解及其练习
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。
例如：That you will win the medal seems unlikely.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。
注意：引导主语从句，不能用if不能在开头，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.（2）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.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。
如：Whoever breaks the law should be punished. （主语从句）（＝Anyone who breaks the law should be punished. ）Whoever breaks the law, he should be punished. （让步状语从句）（＝No matter who breaks the law, he should be punished. ）（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。
主语从句讲解和练习
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。
例如：That you will win the medal seems unlikely.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。
注意：引导主语从句，不能用if不能在开头，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.（2）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.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。
如：Whoever breaks the law should be punished. （主语从句）（＝Anyone who breaks the law should be punished. ）Whoever breaks the law, he should be punished. （让步状语从句）（＝No matter who breaks the law, he should be punished. ）（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。
高考语法 名词性从句之主语从句与表语从句 讲解及练习(附答案)
名词性从句1 主语从句：在复合句中充当主语成分的句⼦子叫主语从句 1.1 主语从句的引导词 1.2 主语从句的形式Conlusion 1:主语从句作主语时，谓语动词一般用单数（第三人称）形式。
Conlusion 2:连词That在句中无实际意义，不能省略。
Conlusion 3:whether引导的主语从句可放在句首，但if不能。
Conlusion 4:主语从句中连词that/whether等不能重复使用。
Conlusion 5:what引导的主语从句，可根据表语决定主句的单复数形式。
Conlusion 6:为了平衡句子结构，主语从句大多可改写为it形式主语形式。
从属连词连接副词连接代词引导词that,whether,if when, why, where, how, whenever, wherever, however what, who, whom, which, whatever,whoever, whomever, whichever形式说明⽰示例that 引导的主语从句置于句⾸首、that 在主语从句中不做任何成分、不可省略他要来看望我们，这使我们很⾼高兴。
形式评语it代替主语从句It + is/was + adj. +从句对于学⽣生来说很明显的是，他们要为未来做好准备。
“It is/was + necessary/important/surprising/strange/unbelievable/obvious…+从句”结构中，从句谓语动词用“should+动词原形”，should可以省略It + is/was + 名词 +从句我们的希望是，我们都能通过考试。
It + is/was + V-ed +从句据宣布，该计划已经顺利通过。
“It is/was + suggested/advised/ordered/insisted/required/demanded…+从句”结构中，从句谓语动词用“should+动词原形”，should可以省略It + is/was + 特殊动词 +从句(happen,occur,seem,appear…)你似乎不同意这个计划。
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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, 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. ）Whoever breaks the law, he should be punished. （让步状语从句）（＝No matter who breaks the law, he should be punished. ）（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。
)例如:Where we should leave it is a problem.When they will come hasn’t been made pubic.三、it 作形式主语的主语从句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。
这分四种情况：(1)对于以连词that引导的主语从句，通常用形式主语it替代主语从句：<a> It is +名词+从句It is a fact that…事实是……；It is good news that ………是好消息；It is a question that ………是个问题；It is common knowledge that ………是常识It is common knowledge that the whale is not a fish.It is no surprise that Bob should have won the game.<b> It is +形容词+从句It is necessary that …有必要……；It is clear that …很清楚……；It is likely that …很可能……；It is important that …重要的是……It seems obvious that we can not go on like this.It is necessary that you （should）master the computer.需要注意的是这类主语从句中，谓语动词很多为“（should）＋动词原形”，即要用虚拟语气。
<c> It is +过去分词+从句It is said that …据说……；It is reported that …据报道……；It has been proved that …已证明……；It must be proved that…必须指出……例如：It is used to be thought that a new star must be due to a collision between two stars.It has not been made clear when the new road is to be opened to traffic. <d> It seems不及物动词（happened / appears / doesn’t’t matter / makes no difference / occurred …）that …主语从句不可提前It makes no difference whether he will attend the meeting or not.It does not matter if I missed my train.It happened that I saw him yesterday.(2)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. 他们是否会支持我们还是一个问题。
It was a problem whether they would support us.他们是否会支持我们还是一个问题。
(3)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 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。
(4)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 girl’s 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？四、连词that的省略问题引导主语从句的连词that 有时可省，有时不能省，其原则是：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末，而在句首使用了形式主语it，则that可以省略：That you didn’t go to the talk was a pity. 很遗憾你没去听报告。
(that不可省) It was a pity (that) you didn’t go to the talk. 很遗憾你没去听报告。
(that可省) 主语从句练习题1.________ makes mistakes must correct them.A. WhatB. ThatC. WhoeverD. Whatever2. It worried her a bit ____ her hair was turning grey.A. whileB. thatC. ifD. for3.When and why he came here ________ yet.A. is not knownB. are not knownC. has not knownD. have not known4. ________ is no reason for dismissing her.A. Because she was a few minutes lateB. Owing to a few minutes lateC. The fact that she was a few minutes lateD. Being a few minutes late5. ________ Tom liked to eat was different from ________.A. That…that you had expectedB. What …that you had expectedC. That…what you had expectedD. What…what you had expected6.________ we go swimming every day ________ us a lot of good.A. If...doB. That...doC. If...doesD. That...does7.It ________ Bob drives badly.A. thinks thatB. is thought whatC. thought thatD. is thought that8.It's uncertain ________ the experiment is worth doing.A. ifB. thatC. whetherD. how9.________ the boy didn't take medicine made his mother angry.A. ThatB. WhatC. HowD. Which10.____ we can't get seems better than ____ we have.A. What, whatB. What, thatC. That, thatD. That, what11.____ you don't like him is none of my business.A. WhatB. WhoC. ThatD. Whether12..____ we'll go camping tomorrow depends on the weather.A. IfB. WhetherC. ThatD. Where13._________is going to do the job will be decided by the Party committee.A. ThatB. WhyC. HowD. Who14._______we'll finish translating the book depends on the time.A. WhenB. WhyC. WhatD. That15.______he won't go there is clear to all of us.A. HowB. WhatC. WhyD. This16.______the house will be built will be discussed at tomorrow's meeting.A. IfB. WhereC. ThatD. What17. ._______you come or not is up to you.A. WhatB. IfC. WhyD. Whether18.._______makes mistakes must correct them.A. WhoB. AnyoneC. WhoeverD. Anybody19.._______team will win the match is a matter of public concern.A. WhichB. ThatC. IfD. How20..________leaves the room last ought to turn off the lights.A. AnyoneB. The personC. WhoeverD. Who答案：高考题：CBBA 1~5 CBACD 6~10DDCAA 11~15 CBDAC 16~20 BDCAC。