史上最全的主语从句讲解和练习
主语从句讲解及其练习
主语从句讲解及其练习主语从句是一个句子，用作句子的主语。
主语从句有三种连词类型。
第一种是从属连词引导的主语从句，包括that、whether和if。
其中，that引导主语从句时，that本身没有意义，不做成分，不能省略。
例如：It seems unlikely that you will win the medal。
主语从句通常用it作形式主语。
而whether引导主语从句时，whether本身有意义（表示“是否”），不能省略。
注意，不能用if引导主语从句，只能用whether。
例如：Whether we will hold a party in the open air tomorrow depends on the ___.第二种是由连接代词引导的主语从句，包括who、whose、whom、which、what、___、whomever、whichever和whatever。
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 ___ we do is to serve the people。
注意，whatever和whoever在主语从句中不含疑问意义，可以在从句中作主语、宾语、表语等。
例如：Whoever breaks the law should be punished。
Whoever breaks the law。
he should be punished.最后，要注意主语从句的格式和语法正确，避免明显的段落错误。
三、形式主语it的使用有时为了句子的平衡，我们会在主语从句处使用形式主语it，将真正的主语从句放到句末。
这种情况分为四种情况：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，形式为It is + 名词 + 从句。
例如：It is a fact that…（事实是……）It is good news that…（是好消息）___…（是个问题）It is common knowledge that…（是常识）类似的名词还有：a pity、a wonder、a good thing、no wonder、surprise等。
主语从句讲解及习题
名词性从句之主语从句一、名词性从句概述：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、主语从句定义：在句中起主语作用的从句称为主语从句。
引导主语从句的连接词主要有：单纯连词(that, whether/ if)、连接代词(what, whatever, who, whoever, whom, whose, which, whichever 等)和连接副词(when, where, why, how, whenever, wherever, however 等)。
1)that引导的主语从句(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.你能得奖看起来不大可能。
That light travels in straight lines is known to all.众所周知，光沿直线传播。
That you don’t like him is none of my business.你不喜欢他不管我的事。
(2)形式主语it替代主语从句位于句首，that引导真正的主语从句会放到句子的后面。
常用的句式主要有如下几种：1.It+系动词+形容词+that从句。
如：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.....类似的形容词还有：strange; natural; obvious; true; good; wonderful; possible; unlikely; quite; unusual; certain; evident; worth-while; surprising; interesting; astonishing, etc.例如：It was really astonishing that he refused to talk to you.It is essential that he should be here by the weekend.It seems obvious that we can not go on like this.It is necessary that you (should)master the computer.It is important that a student learn English well.It' s clear that they badly need help.It is likely that a hurricane will arrive soon.知识拓展：在“It is necessary / important/surprising/strange/unthinkable/unbelievable/incredible+that 从句”这类主语从句结构中，从句中谓语动词常用(should) +动词原形”，形式，即要用虚拟语气should 可省略。
主语从句讲解加练习ppt课件
规律二、连词that 在从句中无实际意义， 但不能省略。
20
主语从句的规律：
例3. If the meeting will be put off has not been decided yet.
It must be admitted that…必须承认……
It cannot be denied that… 不可否认……
It must be pointed out that…需指出的是……
*_I_t_i_s__re_p__o_r_te__d_t_h_a_t__(据报道)20 people were
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。
4
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”*it为形式主语
而把从句放在后面。 例如:
1. That he will refuse this piece of advice is impossible.
4.(__W__h_o_ can join in the sport meet) is decided by the teach
5.(_W__h_e_th__er_ it will rain or not) is not clear.
Conclusion:
主语从句作主语时，谓语动词一般用单数形式。 18
主语从句的规律： 找出下列句子中的错误，并总结规律
例1.When will he come is not known. 正：When he will come is not known.
主语从句强调句讲解练习
主语从句1.定义：用作主语的从句叫做主语从句。
2.引导主语从句的关联词有三类：(1)从属连词that、whether。
如:如：That they were in truth sisters was clear from the facial resemblance between them. 很明显，她们确蔓亲姐妹，她们的脸型很相似。
Whether he'll come here isiTt clear.他是否会来这里还不清楚。
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。
由whether及其他连词引导的主语从句放在句首，句后都可。
IF只能放在句中。
(2)(特殊疑问词)连接代词who, whom? whose, what, which, whoever, whatever, whichever如：__ which _____ watch was lost is unknown.____ w hat ____ she did is not yet known.她干了什么尚不清楚。
—which side will win is not clear.Whoever comes is welcome.不论谁来都欢迎。
(3)(特殊疑问词)连接畐词where, when, how, why, wherever, whenever, however。
he did itremains a mvsterv.When they will start Is not known yet.How this happened is not clear to anyone.这事怎样发生的，谁也不清楚Wherever vou are is mv home ・—mv onlv home.你所在的丘何地方就富我的家…•我旌一矗家。
1.主语从句能用it作形式上的主语。
完整版高中主语从句讲解及其练习
主语从句习题主语从句一、主语从句的连词分三类（1）隶属连词指引的主语从句（that whether if）that 指引的主语从句 :指引词 that 无含义 /在句中不做成分 /不可以以省。
That 指引主语从句平时用it 作形式主语。
比方： That you will win the medal seems unlikely.That she survived the accident is a miracle.whether 指引的主语从句: whether 有含义 (能否 )/ 在句中不做成分/不可以以省。
注意：指引主语从句，不可以用if 不可以在开头，只好用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）用连接代词指引的主语从句在由连接代词who, whose, whom, which, what, whoever, whomever, whichever, whatever指引的名词性从句中，其连接代词在句中起名词性作用，担当必然成分.比方： 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。
它指引主语从句，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 指引的退步状语从句的差别。
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. （退步状语从句）（＝ No matter who breaks the law, he should be punished.）（3）用连接副词 when, where, why, how 指引的名词性从句 (其连接副词有含义 ,在句中作状语。
主语从句讲解及练习
主语从句（DDBDB DDDDD ACBDD CCC）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（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。
注意：引导主语从句，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.（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。
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。
(实用)主语从句讲解加练习
*it为形式主语
2.That they should love each other is natural. _____________________________________ It is natural that they should love each other.
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 It is a pity that 很遗憾)we lost the match. *__ +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...据信……;人们相信…… It is suggested that + (should）do... 建议…… It must be admitted that…必须承认…… It cannot be denied that… 不可否认…… It must be pointed out that…需指出的是……
2.连接代词who ，what ，which, whatever, whichever, whoever (Who, whom, which, what可
It is a fact that 这是事实)he cheated in the *______________( exam.
主语从句讲解及练习PPT文档共25页
21、没有人陪你走一辈子，所以你要 适应孤 独，没 有人会 帮你一 辈子， 所以你 要奋斗 一生。 22、当眼泪流尽的时候，留下的应该 是坚强 。 23、要改变命运，首先改变自己。
24、勇气很有理由被当作人类德性之 首，因 为这种 德性保 证了所 有其余 的德性 。--温 斯顿． 丘吉尔 。 25、梯子的梯阶从来不是用来搁脚的 ，它只 是让人 们的脚 放上一 段时间 ，以便 让别一 只脚能 够再往 上登。
谢谢
11、越是没有本领的就越加自命不凡。——邓拓 12、越是无能的人，越喜欢挑剔别人的错儿。————老子 14、意志坚强的人能把世界放在手中像泥块一样任意揉捏。——歌德 15、最具挑战性的挑战莫过于提升自我。——迈克尔·F·斯特利
高考英语专项复习：主语从句讲解及练习(附答案)
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。
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WORD格式整理 专业知识分享 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。) WORD格式整理 专业知识分享 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： 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 类似的名词还有：a pity；a wonder；a good thing； no wonder； surprise等。 It is a mystery to me how it all happened. It is common knowledge that the whale is not a fish. It is no surprise that Bob should have won the game. 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…… 类似的形容词还有：strange; natural; obvious; true; good; wonderful; possible; unlikely; quite; unusual; certain; evident; worth-while; surprising; interesting; astonishing, etc. It is doubtful whether she will be able to come. It is essential that he should be here by the weekend. WORD格式整理 专业知识分享 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。 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…… 类似的过去分词还有：known; estimated; expected; believed; thought; hoped; noted; discussed; required; decided; suggested; demanded; made clear; found out,etc. 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. 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： WORD格式整理 专业知识分享 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)高考题： 1、It never occurred to me___you could succeed in persuading him WORD格式整理 专业知识分享 to change his mind.(陕西高考)
A．which B．what C．that D．if 2、It's obvious to the students________they should get well prepared for their future.(天津卷) A．as B．that C．which D．whether 3、________some people regard as a drawback is seen as a plug by many others.(2010·北京) A．Whether B．What C．That D．How 4、It is uncertain________side effect the medicine will bring about，although about two thousand patients have taken it.(2010·浙江) A．that B．how C．what D．whether 主语从句练习题 1.________ makes mistakes must correct them. A. What B. That C. Whoever D. Whatever 2. It worried her a bit ____ her hair was turning grey. A. while B. that C. if D. for 3.When and why he came here ________ yet. A. is not known B. are not known C. has not known D. have not known 4. ________ is no reason for dismissing her. A. Because she was a few minutes late B. Owing to a few minutes late C. The fact that she was a few minutes late D. Being a few minutes late