主语从句讲解
初中语法主语从句讲解及
初中语法主语从句讲解及主语从句：即在复杂句中充当主语成分的句子例如"That XXX"，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 XXX"便是该复合句的主语从句。
主语从句使用陈述语序，其通常结构为“引导词+主语+谓语+其他成分”；但当连接代词同时充当从句主语时，其结构为“连接代词+谓语+其他成分”。
时态：主语从句的时态不受主句时态的影响和限制引导主语从句的连词主要有:从属连词:that、whether（只起连接作用，不充当句子成分）连接代词:who、whoever、whom、whose、what、whatever、which、whichever（既有连接作用，又做从句的主语、宾语、表语或定语）连接副词:when、where、how、XXX、wherever（既有连接作用，又做从句的状语）例句：1.that指导例句：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。
2.whether指导例句：Whether they would support us was a problem.他们是否会支持我们还是一个问题。
3.连接代词引导例句：XXX is top from wins the game when two matched players meet.两强相争勇者胜。
4.毗连副词指导例句：How this happended is not clear to anyone.这件事怎样发生的，谁也不清楚。
5.what引导例句：What struck me was that they have all suffered a lot.给我很深印象的是他们都受过很多苦。
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无含艾/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：Tha t you wi I I win the meda I seems uni ike I y.That she survived the accident is a mi racle・whether引导的主语从句：whether有含狡(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whetheroWhether we will hold a party in the open a i r tomorrow depends on the v/eather・Whether she i s 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，其连接代词在句中超名词性作用，担当一定成分.例如：V/hat you need i s more practice.V/hatever 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狡。
它引导主语从句，并在从句中作主语、宾语、表语等。
wha tever = any thing t hat; whoever = any one who。
要注意和whatever, whoever 引导的让步状语从句的区别。
如：Whoever breaks the law shouId be punished・(主语从句)( =Anyone who breaks the law shouId be punished・)Whoever breaks the law, he should be punished.(让步状语从句)( =No matter who breaks the law, he shouId be punished・)(3)用连接副词when, where, why, hov/引导的名词性从句(其连接副词有含狡，在句中作状语。
主语从句讲解ppt课件
What is even more important is that as the earth cooled down, water began to appear on its surface.
主语
What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acid into the oceans and seas.
Subject Clauses 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.
1
What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.
3
The earth became so violent that it was not clear whether the shape would last or not.
It was not immediately obvious that water was to be fundamental to the development of life.
We don’t know
or not .
Whether he is coming is not known.
What does he want to
tell us?
We don’t know what he wants to tell us.
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_._____________________________
(完整word版)主语从句讲解
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，她们确是亲姐妹，她们的脸型很相似.Whether he’ll come here isn’t 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.造句:1。
、很明显他是个好人.2。
、他通过了考试让妈妈很高兴。
3、天气是否会转晴还不确定。
(3）（特殊疑问词）连接代词who, whom， whose， what, which, whoever， whatever, whichever 如：__________watch was lost is unknown.__________she did is not yet known. 她干了什么尚不清楚.__________side will win is not clear。
__________comes is welcome。
不论谁来都欢迎。
__________ was said has left us much to think。
这里说的话都应当保密.造句：1. 我们需要的是时间。
2。
谁将成为我们的班长还没有决定。
3。
哪本书更好还不知道。
(4) （特殊疑问词）连接副词 where, when, how， why，wherever，whenever，however。
___________ he did it remains a mystery.When they will start is not known yet.How this happened is not clear to anyone。
主语从句公开课PPT课件
主语从句可以包含丰富的信息， 包括时间、地点、条件、原因等
，使表达更加准确具体。
通过主语从句可以精确地描述某 个事件或情况，避免歧义和误解
。
主语从句还可以用来表达复杂的 观点和态度，使文章更具深度和
说服力。
增加文采和感染力
主语从句可以采用多种句式和表达方 式，如倒装句、强调句等，增加文章 的文采和感染力。
连接代词和连接副词引导的主语从句一般放在句首，谓语动词用单数形式。
连接代词what和which在引导主语从句时，有时可以互换使用，但which更强调选 择范围。
主语从句时态、语态和语气
03
问题
时态问题
主语从句时态与主句时态一致
01
主语从句中的动词时态通常与主句中的动词时态保持一致，表
示同时发生的动作或状态。
当主语从句中的主语是表示数量的短语（如a number of, the majority of等）时，谓 语动词的单复数形式取决于短语所修饰的名词。
主语从句中的主语是并列结构时，谓语动词用复数形式
当主语从句中的主语是由and连接的并列结构时，谓语动词用复数形式。
练习题讲解
选择题
通过选择题的形式， 让学生判断主语从句 中主谓一致问题的正
当主语从句中的主语是复数形式时，谓语动词必须与主语保持一致，也用复数形式。
特殊情况处理方法
主语从句中的主语是不定代词时，谓语动词用单数形式
当主语从句中的主语是不定代词（如something, nothing, anyone等）时，谓语动词 用单数形式。
主语从句中的主语是表示数量的短语时，谓语动词用单数或…
主语从句与形式主语的区分
形式主语it代替真正的主语从句，使句子结构更加平衡。需注意形 式主语与真正主语的区分。
主语从句讲解
主语从句讲解• 主语从句• 一、主语从句的引导词• 主语从句通常由连词that和whether/if、连接代词或连接副词引导。
• 1. that引导• 2. whether引导• 3. 连接代词引导• 4. 连接副词引导• 5. 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.1• 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 co ming 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。
• 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• who will give us a talk is unknown at all . • Whichever (of you) comes in first will receive a prize.无论(你们)谁先到都可以得奖。
主语从句的用法 主语从句讲解
主语从句的用法主语从句讲解一个句子在复合句中充当一个主语，那么这个句子就是主语从句。
下面小编就给大家介绍主语从句的用法。
主语从句的用法主语从句定义: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。
主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it 代替，而本身放在句子末尾。
1. It 作形式主语和it引导强调句的比较It 作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。
而it引导的强调句则是对句子某一部分进行强调，无论强调的是什么成分，都可用连词that。
被强调部分指人是也可用who/whom。
例如：It is a pity that you didn’t go to see the film.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。
例如：It is a mystery to me how it all happened.这一切是怎么发生的是个谜。
It is common knowledge that the whale is not a fish.鲸鱼不是鱼，这是常识。
It is no surprise that Bob should have won the game.鲍勃会赢得这场比赛，这不足为奇。
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.例如：It is obvious that conductors and insulators are both important in industry.很明显导体和绝缘体在工业中都很重要。
2023年高中英语语法精讲之主语从句详细讲解
2023年高中英语语法精讲之主语从句详细讲解主语从句结构及用法在句子中担当主语的从句就叫做主语从句，通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。
通常结构为“引导词 + 主语 + 谓语 + 其他成分"。
一. 概念：在句子中担当主语的从句就叫做主语从句，通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。
主语从句使用陈述语序，其通常结构为“引导词 + 主语 + 谓语+ 其他成分", 但当连接代词同时充当从句主语时，其结构为“连接代词 + 谓语 + 其他成分”。
二. 引导词：1. that引导eg. That you are coming to London is the best news I have heard this long time.2. whether引导eg. Whether they would come to conference was a question.3. 连接代词引导: who,whom, whose, what, which, whoever, whomever, whichever, whatevereg. Whoever is top from wins the game when two matched players meet.4. 连接副词引导: therefore, besides, otherwise, however, moreover, still, thus, meanwhileeg. How this happended is not clear to anyone.5. 关系代词型what引导三. 形式主语it:1. 对关系代词型what引导的主语从句，可以使用形式主语。
eg. It is clear enough what he meant.2. 如果句子是疑问句，则必须用带形式主语it的结构.eg. Is it true that all of us need to to conference?主语从句有哪几类如果一个句子在复合句中充当一个主语,那么这个句子就是主语从句。
主语从句讲解
1)连接代词 what (whatever ),
who ( whoever) , which (whichever), whom, whose .
连接代词引导主语从句，在句中作主语，宾语，表语， 定语。
Which side will win is not clear. 定语 Who will write the poem has not been decided yet.主语 Whatever he did is right. 宾语 What the city will be still remains a mystery. 表语
It is certain that she will do well in her exam.
B. It + be + 名词词组 + that 从句 (an honour, a fact, a pity, etc）如：
It’s a pity that we can’t go.
C. It + be + 过去分词 + that 从句 (said, reported, thought, expected, decided, announced, etc。） 如：
The earth became so violent that it was not clear whether the shape would last or not.
It was not immediately obvious that water was to be fundamental to the development of life.
Why they suddenly disappeared still remains a mystery.
主语从句讲解
Whoever breaks the law, he should be punished.（让步状语从句）
（＝No matter who breaks the law, he should be punished.）
<d>It seems（happened / appears / doesn’t matter / makes no difference / …）that …
如：
It seems that they will win the game.
看起来他们好像会赢得这场比赛。
It makes no difference whether he will attend the meeting or not.
三. it构成的主语从句
（1）由连词that引导的主语从句，在大多数情况下会放到句子的后面，而用代词it作形式主语。
如：
It is well-known that the earth moves around the sun.
众所周知，地球围绕太阳转。
另外，需要注意的是，it作形式主语代替主语从句时，要注意和as引导的定语从句的区别。试比较：
<b> It is necessary（clear / true / strange/ important /wonderful / possible/ likely…）th
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。
如：
It is necessary that you（should）master the computer.
主语从句讲解
一、主语从句的引导词主语从句通常由连词that和whether、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 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。
主语从句讲解
主语从句讲解《主语从句讲解》篇一：主语从句讲解嘿，同学们，今天咱们来唠唠主语从句这个事儿。
啥是主语从句呢？简单来说，就是在一个句子里，本来该是一个名词或者代词啥的作主语，结果呢，是一个句子来充当主语了，这个句子就叫主语从句。
比如说，“What he said is very important.”这里的“What he said”就是主语从句，你看啊，正常情况下我们可能会说“He said something important.”但是这里把他说的内容当作一个整体，这个整体作为句子的主语，就形成了主语从句。
我记得我刚学主语从句的时候，那叫一个懵啊，就像走进了一个迷宫似的。
我当时就想，这好好的为啥要让一个句子当主语呢？这不是没事找事嘛。
但是后来慢慢就发现它的妙处了。
你想啊，如果我们想要表达一些比较复杂的想法的时候，主语从句就特别有用。
就像“Whether we can succeed depends on our efforts.”这里“Whether we can succeed”这个主语从句就把我们能不能成功这个事儿当成了一个整体，来说明它取决于我们的努力。
这就好比把很多个小零件组装成了一个大的模块，然后把这个大模块放到句子里特定的位置。
再举个例子，“That he is always late makes his teacher angry.”这个句子里，“That he is always late”就是主语从句，它陈述了一个事实，就是他总是迟到这个事儿，这个事儿让他的老师很生气。
这就像一个导火索，这个主语从句就是那个导火索，一旦它发生了（他总是迟到），就会引发后面的结果（老师生气）。
有时候主语从句也会让句子看起来很高级哦。
就像你写作文的时候，你用个主语从句，阅卷老师可能就会眼前一亮。
比如说“Who will be the winner remains a my stery.”这个句子多酷啊，比你直接说“We don't know who will be the winner.”要高大上不少吧。
主语从句 讲解
主语从句主语从句：在复合句中作主语的句子。
主语从句的引导词主要有连词that, whether, if连接代词what, who, whom, whose，which, whatever, whoever, whichever等。
连接副词when，where，how, why1. that 引导的主语从句that 引导的主语从句一般位于句首，有时也用it作形式主语而把that从句后置。
that 在从句中不作任何成分，也没有实际意义，只起连接作用。
（从句位于句首时that不可省略，从句位于句末一般不能省略，在口语中偶尔可以省略）Eg: That he will come is certain.That China is a great socialist country is well known.It has been decided (that)they should start the project the next month.他们决定下个月开始这项工程2.whether/if 引导的主语从句whether/if 只起连接作用，有词义，是“是否”的意思。
whether 引导的主语从句可置于句首，这时不能用if 代替；if 引导的主语从句只能用it作形式主语，而把从句放在句末。
Eg: Whether he will be able to come is still a question.Whether the work can be completed on time is doubtful.=It is doubtful whether/if the work can be completed on time 这项工作能否按时完成还不确定。
3.连接代词和连接副词引导的主语从句连接代词和连接副词引导的主语从句要在句中作一定的成分（主语、宾语、表语、定语、状语、补语等），它们有一定的词义。
并且在任何情况下都不能省略。
主语从句讲解+课件-2025届高三英语上学期一轮复习专项
练习
• 11. _______ they are planning to move to a new city is a possibility. • 12. _______ he passed the exam with flying colors pleased his parents. • 13. _______ you are late for school again is unacceptable. • 14. _______ the economy will recover next year is still uncertain. • 15. _______ she will accept the job offer is uncertain at the moment.
4. 必须用 it 作形式主语的主语从句
• 当主语从句较长或者结构较为复杂时，为了避免句子显得头重脚轻，通常使
用 it 作为形式主语，而将从句放在句子的后半部分。
• - It is clear that he has made a mistake. • - It is uncertain whether they will arrive on time. • - It is important that you should study hard. （你努力学习是很重要的。） • - It is unknown whether he will accept the job offer. （他是否会接受这份工作邀
答案
• 11. That they are planning to move • 12. That he passed the exam • 13. That you are late for school • 14. Whether the economy will recover • 15. Whether she will accept the job offer
主语从句例句讲解
主语从句主语从句(Subj ect C lause)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）Thathe fi nishe d wri tingthe c ompos ition in s uch a shor t tim e sur prise d usall.（2）Wheth er we will go f or an outi ng to morro w rem ainsunkno wn.（3）W ho wi ll be ourmonit or ha sn'tbeendecid ed ye t.（4）W hom w e mus t stu dy fo r isa que stion of g reatimpor tance.（5）Wha t cau sed t he ac ciden t rem ainsunkno wn.（6）W hatev er yo u did is r ight.（7）Whos e wat ch wa s los t isunkno wn.（8）W hat w e nee d istime.（9）What we n eed a re go od do ctors.小结:（1)引导主语从句连词有tha t,whe ther,who,w hat,w hatev er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）I t iscerta in th at he will winthe m atch.（2）It i s tru e tha t hehas m ade a very impo rtant disc overy in c hemis try.（3）It is very like ly th at th ey wi ll ho ld ameeti ng.（4）I t isstran ge th at he shou ld do that.（5）Itis im porta nt th at we allshoul d att end t he me eting.（6）Itis st range that theman s hould have stuc k tohis s illyideas.（7）Itis apitythatwe wo n't b e abl e togo to thesouth to s pendour s ummervaca tion.（8）It i s sti ll amyste ry wh at ca usedthe a ccide nt. （9）It is said that he h as go ne to shan ghai.(=Heis sa id to have gone to s hangh ai) （10）It i s kno wn to allthatthe g un po wderwas f irstinven ted b y the Chin ese.（11）Itis su ggest ed th at th e wor k sho uld b e don e wit h gre at ca re.（12）It se ems t hat h e has seen thefilm.(=Heseems to h ave s een t he fi lm)（13）It ha ppene d tha t the twocheat s wer e the re. (=Thetwo c heats happ enedto be ther e)小结:（1)以that引出的主语从句,常以形式主语i t引导.It is +形容词/名词/某些动词ed + th at 从句.（2) 在有些that从句中要用虚拟语气(shou ld+do/shou ld+ha ve do ne)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。
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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，她们确是亲姐妹，她们的脸型很相似。
Whether he’ll come here isn’t 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：__________watch was lost is unknown.不知道谁的表丢了。
__________she did is not yet known. 她干了什么尚不清楚。
__________side will win is not clear.__________comes is welcome. 不论谁来都欢迎。
__________?was?said?has?left?us?much?to?think. 这里说的话都应当保密。
造句：1. 我们需要的是时间。
2. 谁将成为我们的班长还没有决定。
3. 哪本书更好还不知道。
(3) （特殊疑问词）连接副词where, when, how, why，wherever，whenever，however。
1．主语从句能用it作形式上的主语。
常以it作形式主语的句型有：A. It+be+形容词(obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that从句。
如：It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。
B. It+be+名词词组(no wonder, an honour, a good thing, a pity, no surprise, etc.)+that从句。
如：It’s no surprise that our team should have won the game. 我们没赢这场比赛真意外。
C. It+be+过去分词(said, reported, thought, expected, decided, announced, arranged, etc.)+that从句。
如：It is reported that China has sent another man-made earth satellite into orbit.据报道中国又成功地发射了一颗人造地球卫星。
D. It+seems, happen等不及物动词及短语+that从句。
如：It seems that Alice is not coming to the party at all. Alice似乎不来参加晚会。
It happened that I was out that day. 碰巧我那天外出了。
E. It+doesn’t matter (makes no difference, etc.)+连接代词或连接副词引起的主语从句。
如：It doesn’t matter whether she will come or n ot. 她是否来这无关紧要。
It makes no difference where we shall have the meeting. 我们在哪里开会毫无区别。
F. 当that引导的主语从句出现在疑问句中时，要以it作形式主语，而把主语从句后置。
如：Is it true that the scientist will give us a lecture next week? 下周那位科学家将给我们作报告是真的吗2．注意连接代词whoever, whatever, whichever等引导主语从句的含义Whoever comes will be welcome. (whoever=the person who)来的人都将受到欢迎。
Whatever he did was right. (whatever=the thing that)他所做的事情是正确的。
Whichever of you comes in will receive a prize.(whichever=anyone of you who) 你们当中不论哪个进来将会得到奖励。
3. 主语从句需注意的问题(1)主语从句中用陈述语序What she is afraid of is their taking her to Paris. ( What is she afraid of … Wrong ) (2)主语从句后谓语动词用第三人称单数That they haven’t phoned is strange.(3)that引导的主语从句中，that不可被省略That price will go up is certain.造句：她当选了使我们很高兴.是什么导致了这次事故还完全是一个谜.她是否来还是一个问题.哪个队会赢得这场比赛还不知道.参加聚会的每一个人都将收到一份礼物.他们何时出发还没决定.翻译练习1．(谁将去接他)_____________ is not decided.2．(哪个班极会赢得这场足球赛)________ is not clear so far.3．(他能否买到飞机票)________________ doesn’t matter much.4．(我们如何去那里)_________________ is a question.5．(你刚才告诉我的)________________ was really a surprise.6．(他什么时候出国)_________________ is being discussed7．(他为什么哭)_________________ is not clear.8．It is clear__________(他是一个乞丐).9．(你要请谁)_____________ is not important.10．(我们将在哪里举行篮球赛)__________________ is not clear.金属为什么能导电是一个有趣的问题。
他明天通过考试没有问题。
明天他是否会参加那个舞会，没人知道。
他参加不参加会议没有多大关系。
他是否会拒绝我，不清楚。
它最初是什么时候发明的，现在还不知道。
水到哪里去了，这很容易回答。
人能否飞上月球，现在已不再是什么问题了。
他想要的东西就是一辆汽车。
据说今年秋天会有个好收成真奇怪，她竟然没有看出自己的缺点。
主语从句练习1. _____ you don’t lik e him is none of my business.2. _____ he said at the meeting astonished everybody present3. ________ the 2020 Olympic Games will be held in Beijing is not known yet.4. ________ we’ll go camping tomorrow depends on the weather.5. ________ leaves the room last ought to turn off the lights.6. ___ is a fact that English is being accepted as an international language.7.It worried her a bit ____ her hair was turning grey.8. The Foreign Minister said, “__ is our hope that the two sides will work tow ards peace.”9. After Yang Liwei succeeded in circling the earth, ____ our astronauts desire to do is walk in space.1.I have always been honest and straightforward, and it doesn‘t matter ______that I’m talking to.A. who is itB. who it isC. it is whoD. it is whom2. It is pretty well understood ___ controls the flow of carbon dioxide in and out the atmosphere today.A. thatB. whenC. whatD. how3. _____ made the school proud was______ more than 90％of the students had been admitted to key universities.A. What; becauseB. What ; thatC. That ; whatD. That ; because4. ______ we will go camping tomorrow depends on the weather.A. IfB. WhetherC. ThatD. Where5. _______ that they can pass the written exam this time.A. That is hopedB. It is hopedC. It hopesD. That hopes6. ____ leaves the room last ought to turn off the lights.A. Anyone?B. The personC. Whoever?D. Who7. ___ is a fact that English is being accepted as an international language.A. ThereB. ThisC. ThatD. It8. It worried her a bit ________her hair was turning grey.A. whileB. thatC. ifD. for9. There is no doubt ________.A. that Mr. Hansen is in good healthB. whether is Mr. Hansen healthyC. if Mr. Hansen's health was returningD. whether Mr. Hansen in health10. The Foreign Minister said, “____ our hope that the two sides will work towards peace.”A. This isB. There isC. That isD. It is。