主语从句
概念引入
That you will win the medal seems unlikely.
你想获得奖牌看起来是不可能的。
Whether she is coming or not doesn’t matter too much.
她来不来都无关紧要。
What I want to know is this. 我想知道的就是这事。
When the plane is to take off has not been announced .
飞机何时起飞还没有宣布。
观察上面四个句子可以看出，黑体词部分都有连接词连接，后面都是一个谓语动词，黑体词部分都是整个句子论述的主体部分，它们就是我们本单元要学习的主语从句。
语法讲解
什么是主语从句？
【高清课堂：367100名词性从句（一）主语从句】
在复合句中由一个句子作主句的主语的从句叫主语从句。
What matters is not winning but participating.
I don’t know why he is always finding fault with me.
My hometown is no longer what it used to be ten years ago.
He expressed his hope that he would come to Chengdu again.
其中划横线的部分就是名词性从句。
主语从句引导词：
1. 由what等代词引导的从句,表示“所……的(东西)”，实际上等于一个先行词加上一个定语从句，也可以由-ever等代词引导。
比如:
What they are talking about is nothing valuable.
What I really want is to have a good rest.
Whatever she did is wrong.
比较：Whatever she did, she is wrong.
Whoever passes the exam can get 50 yuan.
比较：Whoever passes the exam, I will give him 50 yuan.
比较：Who passes the exam is still not clear.
2. 由that引导的主语从句,通常用形式主语it来代替。
That he has disappeared worries his parents.
It worries his parents that he has disappeared.
It is not likely that he can win the lottery.
It is a big surprise that he is still alive.
3. 由连接代词、连接副词或whether引导的从句。
When she will be back is still a question.
Where they had put the files troubled the spy.
Whether he will take part in the play is unclear.
Whether or not he will go to Japan is up to her.
主语从句的连接词----详述
(1) 连词that、whether：
这两个词是从属连词，在从句中不作任何成分，that没有意思，只起标志和连接作用；whether意为“是否”。
That price will go up is certain. 价格会上升是肯定的了。
That the wounded soldier is still alive is a wonder. 那个伤员还活着真是个奇迹。
That Mr. Zhou will come makes us excited. 周先生要来这个事使我们很激动。
Whether we go by train or by boat makes no difference. 我们乘火车或船没有什么不同。Whether he’ll c ome here isn’t clear. 他来不来这里还不清楚。
Whether we can go to picnic tomorrow is still a question.
我们明天是否去野餐还是个问题。
Whether the work can be completed on time is doubtful. 这项工作能否准时完成还难以预料。
(2) 连接代词what, who, whom, whose, which；whoever, whatever, whichever等
连接代词都有各自的意思，在从句中充当主语，宾语，表语或定语，一般表示疑问。
a. what的意思有两个：……的东西/事情等，什么。
b. whoever相当于anyone who；whatever相当于anything that。
What she did is not yet known. 她做了什么还不知道。
Who will write the poem has not been decided yet. 谁来写这首诗还没有定。
Who will go makes no difference. 谁去都一样。
Whatever he did is right. 他无论做什么都是对的。
Whoever breaks the rule should be punished. 无论谁违反规则都应该受惩罚。
Whom she loves is clear enough . 她爱的是谁已经够清楚了。
Whose wallet was stolen must be made clear.谁的钱包被偷了必须被搞清楚。
(2015 上海高考) What makes the game unique is that it helps children learn how to cope with problems in real life. 这个游戏的独特之处在于它让孩子学会如何应对现实生活中的问题。（3) 连接副词：when, where, why, how, whenever, wherever, however等。
这些词有各自的意思，在句中充当状语，不能省略。
How this happened is not clear to anyone. 这事如何发生的任何人都还不清楚。
When he will be back depends on the weather. 他什么时候回来取决于天气。
How the pyramids were built is still a mystery. 金字塔怎样建起来的还是个谜。
Whatever she says will not make any difference to our arrangements.
无论她说什么，都是不会对我们的安排有影响。
主语从句后置与形式主语it
主语从句后置：
为了避免主语冗长，句子头重脚轻，经常用it作形式主语，把主语从句放在后面作真正的主语。例如：
1. That the earth goes around the sun is known to us all.
→It is known to us all that the earth goes around the sun. 众所周知，地球绕着太阳转。
2. That he knows nothing about it is strange.
→It is strange that he knows nothing about it. 奇怪这件事他什么也不知道。
3. When flood stu ck the western areas wasn’t reported.
→It wasn’t reported when flood stuck the western areas.
什么时候洪水袭击了西部地区没有报道。
4. Whether he can come or not depends on his parents.
→It depends on his parents whether he can come or not. 他来不来取决于他的父母亲。
5. That he didn’t attend the meeting surprised us.
→It surprised us that the he didn’t attend the meeting.他没有参加会议使我们很吃惊。
6. Whether Class Five can defeat Class Four isn’t known yet.
→It isn’t known yet whether Class Five can defeat Class Four.还不知道五班是否能打赢四班。
常用句型
1. It+系动词+形容词+that从句。
常用形容词：obvious, true, natural, surprising, good, wonderful, funny, possible, likely, unlikely, certain, probable, necessary, right, wrong, important, certain, clear, strange，etc.
It is certain that she will do well in her exam. 她考试能考好是肯定的了。
2. It +系动词+名词词组+that从句
常用名词词组：no wonder, no wonder, an honor , a good thing, a pity, no surprise, a shame, good news, a fact ,etc.
It’s no wonder that you have achieved so much success. 难怪你取得了这么多的成功。
It’s a pity that you didn’t attend the lecture yeste rday. 真可惜你没出席昨天的讲座。
(2016 江苏高考) It is often the case that anything is possible for those who hang on to hope．
通常情况下，对于那些心存希望的人一切皆有可能。
3. It +be+过去分词(said, told, reported, thought, expected, decided, announced, arranged, heard, suggested，etc.)+that从句，意为“据……(说/报道/认为/预测/决定/通知/安排/听说/建议）。It is said that Mr. Green has arrived in Beijing. 据说格林先生已经到了北京。
4 .It +特殊不及物动词（seem, appear, happen等）+that从句
It seems that you are against the plan. 你似乎反对这个计划。
It happened to me that I had been away when you called.
碰巧你打电话时我不在。
5. It + doe sn’t m atter (makes no difference, etc.)+连接代词或连接副词引起的主语从句。
It doesn’t matter whether she will come or not. 他来不来没有关系。
注意：在主语从句中用来表示“惊奇，不相信，惋惜，理应如此，要求，建议”等语
时，谓语动词用“should+ do”，should译成“竟然”或“应该”，should可以省略。
常用句型：
I t’s necessary /important / str ange /natural/+that sb. should do sth.
It is a pity ( a shame, no wonder, etc.) that sb. should do sth.
It is suggested (requested, proposed提议，desired请求) that sb. should do sth.
学生上课认真听讲是很重要的。
It is important that the students should listen carefully in class.
It’s strange that he should have missed the train. 他竟然没有赶上火车，真奇怪。
It’s suggested that we (should) put on a short play at the party.
有人建议我们在晚会上演一个短剧。
主语从句需注意的问题
1.主语从句中用陈述语序。
2.主语从句的“that”一般不能省。
3.“what”引导主语从句时，谓语动词：
1）常与其后的名词作表语一致2）根据句子的语境而定。
What you left are only several old books. 你留下的只有几本书。
（根据表语可知，what从句是复数概念，谓语用复数）
What you said is of great importance. 你说的话很重要。
（what从句是不可数名词的概念，谓语用单数）
Whether he’ll come here is not clear. 他是否来这里不清楚。
（whether引导的从句表示一件事，谓语用单数）
4. if /whether 引导的主语从句
表示“是否”意义时whether引导的主语从句可以放于句首、句末，主语从句不位于句首时，也可以用if引导。
Whether the work can be completed on time is doubtful.
It’s doubtful whether /if the work can be completed on time.
5.Wh –类连接副词或连接代词引导的主语从句可放于句首，也可放句尾。
When the new road is open to traffic has not been made clear.
It has not been made clear when the new road is open to traffic.
6. wh-ever 引导的让步状语从句及名词性从句。
除了引导名词性从句外，wh-ever类的引导词也可以引导让步状语从句，相当于no matter wh-。比较下列句子：
He believes whatever his wife says. 他相信他妻子说的任何事情。
( whatever= anything that 名词性从句)
He believes his wife whatever she says. 无论他妻子说什么，他都相信。
(whatever= no matter what 让步状语从句)
Whoever breaks the school rules should be punished. 违犯学校规定的人应该受到惩罚。
( whoever= anyone who 名词性从句)
Whoever breaks the school rules，he will be punished. 无论谁违犯了学校的规定，他都会受罚。( whoever= no matter who 让步状语从句)
名词性从句---主语从句 1. What is needed for the space trip is careful preparation. 2. Her wish is that she can lose weight soon. 3. I think that woman can reach every high achievements in many fields of science. 4. We were very excited at the news that our team had won. 引导名词性从句的关联词可分为三类： 一．从属连词：that（无任何词意） whether, if（均表示“是否”表明从句内容的不确定性） as if ,as though（均表示“好像”，“似乎”）以上在从句中均不充当任何成分二．连接代词：what, who, whom, which，whose, whatever, whoever, whichever(作主宾表定) 三．连接副词：when, where, how, why(作状语) I.主语从句 1.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。 2.位置：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。 3.引导主语从句的关联词： (1)从属连词that,whether,if (在从句中不充当成分，仅起连接作用) That Jack won the match yesterday surprised us. Whether he’ll come here isn’t clear. (此处不能用if) (2)连接代词who, whom, whose, what, which, whoever, whatever, whichever(充当主宾表定) What she did is not known. Whoever comes is welcome. (3)连接副词where,when,how,why(在从句中充当状语) How this happened is not clear to anyone. When the meeting will be held is decided by our manager. 4.有时为了避免头重脚轻，常用it作形式主语，而把真正主语放在句子末尾。 How the book will sell depends on its author. = It depends on its author how the book will sell. That he is the best student in the class is obvious. = It is obvious that he is the best student in the class. 用it作形式主语的几种常见结构： (1) It is ＋名词＋从句 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 (2) It is ＋形容词＋从句 It is natural that… 很自然It is strange that… 奇怪的是… (3) It is ＋不及物动词＋从句 It seems that… 似乎… It happened that… 碰巧… It ap pears that… 似乎… (4) It ＋过去分词＋从句
高中英语语法主语从句 第一节主语从句 1．考点解析。 1．主语从句一般分为三类：由what等代词引导的主语从句；由连词that 引导主语从句，多数情况下由it作形式主语，that从句放到句子后面去；由连接代词或连接副词（或whether）引导的主语从句。 What they are after is beauty. It is not your fault that we can’t arrive on time. When they will arrive has not been decided. 2. 由关系代词what引导的主语从句，也可由whatever（“所…的一切”）或 whoever（“一切…的人”）引导。 Whatever he wants is your support. Whoever comes will be welcome. 3. 大多数主语从句都可用it代替，作形式主语，把主语从句放在句尾。要注意it代替主语从句和it引导的强调句的区别。强调句的结构是it is/was….+that…，强调人是可把that 换做who，whom，whose。如强调的是状语时，也只能用that,而不能用when, where, how, why等。 It was in Paris that they fell in love with each other. It is the lady who was my English teacher. It was last semester that he won the first prize. 2. 试题详解。 1．______ he needs is more experience. A. Who B. That C. What D. How 2.It was because of the heavy snow ______ the train was late. A. why B. that C. so D. thus 3．It doesn’t matter ______ he likes or not. A. whether B. what C. when D. that 4______ he has won the Noble Prize has been proved to be true. A. What B. How C. It D. That 5．What he wants _______ to sleep more. A. are B. have been C. is D. were 6．______ we can begin this investigation is still a question. A. When B. Why C. What D. That 7．It is ______ that the highway will be open to traffic nest year. A. report B. reported C. reporting D. by report 8．______ fails to see this will make a big mistake. A. Whatever B. what C. wherever D. Whoever 9．It is a mystery _____ the prisoner escaped. A. why B. how C. what D. that 10．It was last summer _____ he graduated from the college. A. that B. when C. / D. where 3. 实战演练。 1. We didn’t know ______ she didn’t come. A. why B. that C. when D. it 2. It is still doubtful _______ she would play the part.
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.
语法要点剖析 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, why 1. 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： 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。 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。引导宾语从句的关联词与引导主语从句表语从句的关联词大致一样，在句中可以作谓语动词或介词及非谓语动词的宾语。 1. 由连接词that引导的宾语从句 由连接词that引导宾语从句时，that在句中不担任任何成分，在口语或非正式的文体中常被省去，但如从句是并列句时,第二个分句前的that不可省。例如：He has told me that he will go to Shanghai tomorrow.他已经告诉我他明天要去 上海。 We must never think (that) we are good in everything while others are good in nothing. 我们决不能认为自己什么都好，别人什么都不好。
xx考研英语语法复习主语从句 在复合句中充当主语成分的句子叫作主语从句。具体形式为：引导词引导一个从句作主语;或者it作形式主语+谓语/系表结构+引导词+从句。 ⑴陈述句充当主语从句，连词为that(that没有实际含义，在从句中只起连接作用，不在从句中作任何语法成分)，从句为"that+陈述句"，that不能省略。 【例句】 That Chris Lee won the champion of Super Girl in xx arouse wide public concern. 李宇春赢得xx年超女冠军这件事引起了社会的广泛关注。 ⑵一般疑问句充当主语从句，连词为whether(whether"是否"的含义，在从句中只起连接作用，不在从句中作任何语法成分)，从句为"whether+陈述句语序"，whether不能省略。 【例句】 Whether this is true or not remains a mystery. 这是对是错还是个谜。 ⑶特殊疑问句充当主语从句，连词为特殊疑问词(特殊疑问词都有自己的含义，在从句中作一定的语法成分)，从句为"特殊疑问词+陈述句语序"，特殊疑问词不能省略。 【例句】 例1 --what
What caused the aident remains unknown. 是什么引起了这一事故仍然。 例2--where Where my wife and I should enjoy our honeymoon is still unsettled. 我太太和我应该去哪享受我们的蜜月还没有最后决定。 例3 --which Which university I should choose to continue my further education is a question of great importance. 我应该考哪个大学的研究生是个很重要的问题。 例4--when When and where the test will be given is not yet decided. 什么时候在什么地方进行考试还没定下来。 例5---ever Whoever gets the job will have a lot of work to do. 任何得到这份工作的人都将要有很多工作要做。 例6--how How we can protect the grain from damp needs to be discussed. 我们怎样才能保护粮食不受潮需要讨论讨论。 3.It句型
必修三Unit4主语从句(Subject Clause) ?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。 ?位置： 1.通常放在主句谓语动词之前 That he will succeed is certain. Who will be our monitor hasn't been decided yet. Whether he will join us won't make difference. How the book will sell depends on its author. What caused the accident remains unknown. 2.由形式主语it代替，而本身放在句子末尾。 It doesn’t matter whether he is wrong or not. ?辨别下列从句的类别(1-6)：主从；宾从；表从；主从；宾从；主从 ?主语从句的连接词 引导主语从句的连接词可分为三类：连接词：that, whether / if；连接代词：what, which who, whom, whose, whatever, whoever, whichever等；连接副词：when, where, how, why, whenever, wherever等。 ●that:1.无词义；2.在主语从句中不作成分；3.一般不能省略（尤其在句首时） That he will come and help us is certain. That he is the best student in the class is obvious. ●Whether / if: 1.有词义：“是否”；2.在主语从句中不作成分；3. whether引导的主语从句可 放句首、句末；4. If引导的主语从句不能位于句首。 Whether we will succeed is still a question. If we will succeed is still a question. (×) It is not known whether / if he will come. what, whatever, who, whoever, whose, which, whichever when, where，why, how等。 1.有词义； 2.在主语从句中作成分。 What he is has nothing to do with you. Whose ticket this is has not been found out. When the test will be given is not yet decided. Whatever you did is right. ?如何选择连接代词和连接副词 在主语从句中，连接词的选择要看这个从句的句子结构，假如根据意思判断为缺少主语，宾语，表语等时应该考虑who, whoever, which, whichever, what, whatever, whom, whomever；如果缺少定语则想到whose, which；如果缺少状语则应该选择how, where, when, why等。因此要想做好题目首先得了解句子成分。 What I can’t understand is why he has changed his mind. （缺少understand的宾语，意为“…的事”） Whoever breaks the law will be punished.（缺少breaks的主语，意为“无论谁”） ?主语从句后置！ 为了避免主语冗长，句子头重脚轻，主语从句作主语时通常用it作形式主语，主语从句放在后面作真正的主语。 That he finished writing the composition in such a short time surprised us. =It surprised us that he finished writing the composition in such a short time. Whether he will come or not doe sn’t matter. =It doesn’t matter whether he will come or not. Who will do that job is not yet decided. =It is not yet decided who will do that job. ?用it作形式主语的that从句有以下搭配关系： 1. It + be +形容词+ that从句 It is necessary / important / obvious / certain / natural…that… It is necessary that the problem should be discussed at once.
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，whether 1）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”。 What we need is money. That he will come is certain. 2）whatever / whoever的用法（~ever=no matter ~---让步状语从句中） whatever / whoever可以引导主语从句,并在句中作主语、宾语、表语等,不含疑问意义。whatever相当于anything that; whoever 相当于anyone who。例如: Whoever(Anyone who) wants to enter into this school must take the exam. Whatever(Anything that) she did was right. 3. 连接副词when，where，how，why等。既有疑问含义,又起连接作用,同时在从句中充当各种成分。How this happened is not clear to anyone. When he will be back depends on the weather. When we’ll start tomorrow will be told soon. Where the test will be given is not yet decided. 4. 主语从句后置：为了避免主语冗长,句子头重脚轻,经常用it 作形式主语,主语从句放在后面作真正的主语. 例: That we shall be late is certain. -- It’s certain that we shall be late. 1）用it 作形式主语的结构 A. It + be + 形容词+ that 从句 (obvious, true, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.) 如：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 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’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：It is said that Mr. Green has arrived in Beijing. D. It + 不及物动词或短语+ that 从句( seem，happen, doesn’t matter ,turn out）。如： It happened that I was out that day. It doesn’t matter whether she will come or not. 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
定语从句 1. After living in Australia for many years, Louise finally returned to the country she was born. 2. There are many good websites you can check out the latest in the science world. 3.Another saying which has come from the fable is "God helps those help themselves”. 4. Then Needham began his lifelong research, ended up creating the greatest work--Science and Civilization in China. 5. His interest started a few years ago, he was in college and studying wildlife science. 6. There are perhaps 40 million competitive table tennis players and many ordinary people play less seriously. 7. He was a great scientist and extraordinary man work and legacy will live on for many years. 8. That is an Oxford college, famous graduates include the late Benazir Bhutto. 9. But it's not like many other countries there seems to be tension among the different cultures. 10. Then, a fire, broke out in 1969 on Cleveland's Cuyahoga River, shed light on the problem of chemical pollution in water. 11. Pupils, usually come from the fifth or sixth grade, are
主语从句详解 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 matt er 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. 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. ） （4）用连接副词when, where, why, how引导名词性从句(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、注意点: it构成的主语从句 （1）由连词that引导的主语从句, 在多数情况下放到句子的后面, 而用代词it作形式主语. 例如：That light travels in straight lines is known to all. =It is known to all that light travels in straight lines.
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。) 例如:Where we should leave it is a problem. When they will come hasn’t been made pubic.
在句子中起名词作用的句子叫名词性从句。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、同位语等，因此根据它在句中不同的语法功能，名词性从句又可分为主语从句、宾语从句、表语从句和同位语从句。今天我们就来重点讲一下其中的主语从句。 在复合句中充当主语成分的句子叫作主语从句。它的具体表现形式是：引导词引导一个从句作主语；或者it作形式主语+谓语/系表结构+引导词+从句。 【例1】that That Chris Lee won the champion of Super Girl in 2005 arouse wide public concern.李宇春赢得2005年超女冠军这件事引起了社会的广泛关注。 【例2】what What caused the accident remains unknown.是什么引起了这一事故仍然未知。 【例3】where Where my wife and I should choose to continue my further education is a question of great importance.我太太和我应该去哪享受我们的蜜月还没有最后决定。 【例4】which Which university I should choose to continue my further education is a question of great importance.我应该考哪个大学的研究生是个很重要的问题。 【例5】when When and where the test will be given is not yet decided.什么时候在什么地方进行考试还没定下来。 【例6】-ever Whoever gets the job will have a lot of work to do.任何得到这份工作的人都将要有很多工作要做。 【例7】how How we can protect the grain from damp needs to be discussed.我们怎样才能保护粮食不受潮需要讨论。 【例8】whether Whether this is true or not remains a mystery.这是对是错还是个谜。 It句型 有的时候主语从句过长，根据人类短暂记忆规律，主语过长会影响理解和阅读，往往会用it作形式主语，而把真正的主语放在句尾，加以强调，是为it句型。 【例】 It is a pity that we won’t be able to go to the south to spend our summer vacation.我们不能去南方度过我们的暑假很遗憾。 为表示强调，常以形式主语it引导从句。It+谓语+引导词+从句。由于主语从句一般被认为是单数形式，形式主语代表真正的主语，因此要用it。因此形式主语的谓语动词、be动词+表语均为第三人称单数形式或过去式。 英国桂冠诗人约翰·梅斯菲尔德说：“快乐的日子使人睿智。”很多考生可能觉得这句话应该反过来说，但其实复习过一段时间以后，面对着越来越复杂的难题，你就会发现，保持快乐的心态，复习效率自然而然就会提高。
Section Ⅲ Grammar —主语从句 在主从复合句中，充当主语的从句，即为主语从句。 一、主语从句的连接词 1．连接词that和whether (1)that在从句中不充当任何句子成分，只起连接作用，但不可省略。 ①That Whitney Houston died upset her fans all over the world. 惠特尼·休斯顿的离世令全世界的粉丝感到难过。 (2) whether在从句中不充当任何句子成分，起连接作用，意为“是否”，不可省略。 ②Whether the plan will be carried out is still unknown. 这个计划是否会实施还不知道。 即学即练1 1－1.完成句子 ①她能来帮助我们使我们很高兴。 _________________________ made us very happy. ②他被选为(be chosen as)志愿者(volunteer)让我们感到高兴。 ____________________________ made us happy. ③我们明天是否举行派对取决于天气。 ____________________________ depends on the weather. ④(湖南高考)Everyone in the village is very friendly. It doesn't matter ________ you have lived there for a short or a long time. A．why B．HowC．whether D．when 2．连接代词(who，whose，whom，what，which，whichever，whoever, whomever, whatever 连接代词引导主语从句，在从句中可以作主语、宾语、表语或定语。 ①Who will take his place is not important.谁将代替他并不重要。 ②Whoever breaks the law should be punished. 无论是谁只要违法就应该受到惩罚。 3．连接副词(when, where, how, why等) 连接副词引导主语从句并在从句中作状语。 ③When we will have a meeting is an important question [点津] 主语从句中连接词的选择标准： ⅰ.根据连词在句子中所作的语法成分； ⅱ.根据连接词在从句中的意义。 2－1.用连接代词或连接副词填空并写出它们在从句中所作的语法成分 ①What role he will play in the film hasn't been known.______ ②Why John was late for the class has been unexplained._______ ③Which part of the country he will travel to needs discussing.____
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, why 1. 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…