名词性从句讲解与练习答案解析版
(完整版)名词性从句讲解及专项练习习题及其解答
名词性从句讲解在复合句中起名词作用的从句叫做名词性从句。
它包括主语从句、宾语从句、表语从句和同位语从句。
名词性从句是中学阶段的一个重要语法项目，在历年的高考中几乎都涉及到，并且每年的命题各有变化。
分析历届高考试题名词性从句考查的焦点主要有以下六个方面1. 考查名词性从句的语序问题2. 考查引导词that与what的区别3. 考查it在名词性从句中作形式主语或形式宾语的用法4. 考查whether与if的区别5. 考查名词性从句中的疑问词+ever引导的名词性从句与no matter+疑问词引导的状语从句的区别6. 考查名词性从句的虚拟语气问题语法要点剖析一、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, 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：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。
高中英语名词性从句知识讲解以及练习题 附答案
高中英语名词性从句知识讲解以及练习题附答案一、名词性从句概述名词性从句是一种充当名词作用的从句，通常在主句中作主语、宾语、表语或同位语。
它通常由引导词（如that, whether, if, who, whom, whose, which, what等）引导，并且从句中含有一个主语和谓语。
名词性从句的种类有很多，包括主语从句、宾语从句、表语从句和同位语从句等。
下面我们将逐一介绍这些从句。
二、主语从句主语从句作为一个名词，通常位于句首，是一个句子，主要作用是作为主句的主语。
引导主语从句的词：What (什么)；Whether (是否)；If (是否)；That (那个)。
例句：What he said is true. (他说的是真的。
)Whether it will rain tomorrow is uncertain. (明天是否会下雨还不确定。
)If you go, I will go too. (如果你走，我也跟着走。
)That he is coming is good news. (他来的消息是好消息。
)注意：主语从句的谓语动词通常要用单数形式。
What引导的主语从句通常用来表示“事物”的概念。
三、宾语从句宾语从句是一个名词，通常位于主句的动词后面，作为主句的宾语。
它可以由常见的宾语从句引导词引导，例如whether, if, that, who, whom, whose, what, when, where, how等。
引导宾语从句的词：Whether (是否)；If (是否)；That (那个)；Who (谁)；Whom (谁)；Whose (谁的)；What (什么)；When (何时)；Where (何处)；How (如何)。
例句：I know that he is coming. (我知道他要来。
)I wonder if he is telling the truth. (我想知道他是否说了真话。
初中英语名词性从句解题技巧讲解及练习题(含答案)含解析
初中英语名词性从句解题技巧讲解及练习题(含答案)含解析一、初中英语名词性从句1． is known to all is that the earth is smaller than the sun.A. AsB. WhatC. ItD. Which【答案】 B【解析】【分析】句意：众所周知地球比太阳小。
is known to all 是主语从句，从句中缺少主语，因此用what，选B。
【点评】考查名词性从句，本题涉及what引导的主语从句。
2．While some behaviors may seem strange to you, remember you consider normal probably seems just as unusual to others.A. it; thatB. what; thatC. that; whatD. which; that【答案】 C【解析】【分析】句意：虽然有些行为对你来说可能很奇怪，但请记住，你认为正常的行为对别人来说可能也不寻常。
第一空为宾语从句，从句结构完整用that起连接作用，第二空为主语从句，从句中consider缺少宾语，应该用what，故选C。
【点评】考查名词性从句，本题涉及that引导的宾语从句和what引导的主语从句。
3．Has it been announced ______?A. when are the planes to take offB. that are the planes to take offC. where are the planes to take offD. when the planes are to take off【答案】 D【解析】【分析】句意: 飞机什么时候起飞已经宣布了吗？此处是when引导的主语从句，且要用陈述句语序，故选D。
【点评】考查名词性从句，it作形式主语，关系副词when引导的从句作真正的主语。
名词性从句讲解及专项练习习题及解答
名词性从句讲解在复合句中起名词作用的从句叫做名词性从句。
它包括主语从句、宾语从句、表语从句和同位语从句。
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（两种结构，三类连接词）两种结构1.主语从句位于句首：What he wants is a book.Who kept the door open all night was unknown.2.主语从句位于句尾，it 作形式主语。
（1）It + be + 名词+ that从句It’s a pity that we can’t go. 很遗憾我们不能去。
It’s no surprise that our team should have wo n the game. 我们没赢这场比赛真意外。
（2）It + be + 形容词+ that从句.It seems obvious that we can not go on like this. 很明显我们不能这样下去了（3）It + be + 动词的过去分词+ that从句It is known to all that light travels in straight lines.众所周知光沿直线传播。
It is reported that China has sent another man-made earth satellite into orbit.（4）It + 不及物动词+ that 从句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…三类连接词:1.连词that whetherthat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。
英语名词性从句专项习题及答案解析及解析
英语名词性从句专项习题及答案解析及解析一、初中英语名词性从句1．______ has caused great confusion is ______ he made it without anyone else's help. A. What; that. B. What; how. C. It; how. D. It; that.【答案】 B【解析】【分析】句意：让人极大困惑的是他如何在没有别人帮助的情况下做到这一点的。
表示“让人困惑的事情”用what引导主语从句，表示“如何做到的”用how表方式，引导表语从句。
故选B.【点评】考查名词性从句，本题涉及what引导的主语从句和how引导的表语从句。
2．While some behaviors may seem strange to you, remember you consider normal probably seems just as unusual to others.A. it; thatB. what; thatC. that; whatD. which; that【答案】 C【解析】【分析】句意：虽然有些行为对你来说可能很奇怪，但请记住，你认为正常的行为对别人来说可能也不寻常。
第一空为宾语从句，从句结构完整用that起连接作用，第二空为主语从句，从句中consider缺少宾语，应该用what，故选C。
【点评】考查名词性从句，本题涉及that引导的宾语从句和what引导的主语从句。
3．________ is known to us all that the old scientist, for ________ life was hard in the past, still works hard in his eighties.A. As; whoseB. It; whoseC. As; whomD. It; whom【答案】 D【解析】【分析】句意：我们都知道，那位老科学家，过去生活很艰苦，到了八十多岁还在努力工作。
专题20 名词性从句 (解析版)
高考英语一轮复习语法填空专题应对策略专题20 名词性从句学问网络考点考法1.功能1.作主语：主语从句：__________ he has got the scholarship is true.（答案为That）2.作宾语：宾语从句：Mr Li said __________the earth goes around the sun.（答案为that ）3.作表语：表语从句：My idea is __________we should do it right away.（答案为that ）4.作同位语同位语从句：I got the impression __________ you are unhappy.（答案为that）2.四种类型1)主语从句：1.that引导：__________Tom should cheat me is disappointing. （答案为That ）2.whether引导：__________ we’ll have a picnic hasn’t been decided. （答案为Whether）3.连接代词：__________ you need is a good long vacation. （答案为What）4.连接副词：__________ he arrives doesn’t matter. （答案为When）5.形式主语：It happened __________ she was out when we called.（答案为that）It is reported __________ ten people were killed in the explosion.（答案为that）2)宾语从句：1.that引导：He insisted __________ we (should) accept the gifts.（答案为that）2.whether /if引导：I doubt __________ he will come.（答案为whether /if）3.连接副词：She inquired __________ we are getting on. （答案为how）4.连接代词：He did __________ he could to comfort her. （答案为what）5.形式宾语：I find it strange __________ she doesn’t want to travel. （答案为that）I hate it __________ people talk about me behind my back. （答案为when）3)表语从句：1.that引导：The trouble is __________ we are short of money.（答案为that）2.whether引导：The question is __________ you will support me.（答案为whether）3.连接副词：That’s __________ you are wrong. （答案为where）4.连接代词：He is no longer __________ he used to be. （答案为what）5.其他：That’s __________ she spoke French so well. （答案为why）4)同位语从句：1.that引导：There is no doubt __________ he is guilty. (紧跟抽象名词后)（答案为that）The story goes__________ she got promoted.(与名词分开)（答案为that）He gave me some advice __________ I should read English every day.（答案为that）2.whether引导：There is some doubt __________ he will come. （答案为whether）3.连接副词: I have no idea __________ large the physical universe is. （答案为how）4.连接代词：The question __________ will replace him is still not clear.（答案为who）真题回顾语法填空：在空白处填入1个适当的单词。
名词性从句用法讲解与专项练习题及答案
名词性从句用法讲解与专项练习题及答案名词性从句包括主语从句、宾语从句、表语从句和同位语从句。
高考常从连接词的选择、语序、语气、时态等方面来考查。
名词性从句中的连接词有连词that / whether / as if，连接代词what / who/ which /whose / whatever / whoever / whomever / whichever，连接副词where /when /why / how / wherever / whenever。
第1讲引导名词性从句的连接词\考点1. 引导名词性从句的连接词有哪些有学生认为，引导同位语从句只能用that, 这句话对吗先看下面几个句子。
①I have no question that he will come.②I have a question whether he will come③I have a question when he will come.我们可以看出：上面三个句子中question后面都是同位语从句，都是说明question的内容的。
~在句①中，同位语从句的原句是陈述句，由that引导；在句②中，原句是一般疑问句，由whether引导；在句③中，同位语从句的原句是特殊疑问句，特殊疑问词也起着连接作用。
其实，所有名词性从句的连接词都有上面的三种情况。
宾语从句：I don’t know that he will come.I don’t know whether/if he will come.I don’t know when he will come.【表语从句：What I don’t know is that he will come.What I don’t know is whether he will come.What I don’t know is when he will come.主语从句That he will come is obvious.Whether he will come isn’t known yet.When he will come isn’t known yet.^1. 【2010浙江】It is uncertain ______ side effect the medicine will bring about, although about two thousand patients have taken it.A. thatB. whatC. howD. whether2. 【2012全国新课标】It is by no means clear ______ the president can do to end the strike.A. howB. whichC. thatD. what3. 【2012山东】It doesn’t matter ______ you pay by cash or credit card in this store.A. howB. whetherC. whatD. why4. 【2013陕西】It remains to be seen ______ the newly formed committee’s policy can be put into practice.]A. thatB. whichC. whatD. whether5. 【2009天津】It is obvious to the students ______ they should get well prepared for their future.A. asB. whichC. whetherD. that6. 【2012江西】It suddenly occurred to him ______ he had left his keys in the office.A. whetherB. whereC. whichD. that考点2. 引导词that的省略问题主语从句、表语从句、同位语从句中连词that不能省略。
初中必备英语名词性从句技巧全解及练习题(含答案)
初中必备英语名词性从句技巧全解及练习题(含答案)一、初中英语名词性从句1．_________ is known to all is that the earth is smaller than the sun.A. AsB. WhatC. ItD. Which【答案】 B【解析】【分析】句意：众所周知，地球比太阳还小。
复合句的主语是一个名词性从句，从句没有引导词和主语，表示“所……的（事）”，故用what引导，其双重作用，故选B。
【点评】考查名词性从句，本题涉及what引导的主语从句。
2．_____ is known to us all is that China has launched Shenzhou VII spaceship, ____ made the country's first spacewalk successful.A. That; whatB. What; whichC. It; whichD. As; that【答案】 B【解析】【分析】句意：众所周知，中国已经发射了神州7号宇宙飞船，这是中国首次成功的太空行走。
第一空处为主语从句，从句缺少主语，需用what引导；第二空所在句子是个定语从句，先行词为整个主句的内容，从句中缺少主语，需用which引导。
故选B。
【点评】考查名词性从句和定语从句，本题涉及主语从句和非限制性定语从句的应用。
3．In the past decade, our education system too much on grades. However, grades have a direct connection with future success is still a question.A. focused; whetherB. focused; ifC. has focused; whetherD. has focused; if【答案】 C【解析】【分析】考查时态和主语从句。
高考名词性从句讲解、习题及答案
名词性从句名词性从句（主语从句，表语从句，宾语从句，同位语从句）1.that 引导的名词性从句，that 在从句中不充当任何句子成分，没有词义。
that引导宾语从句时常可省略，但如果引导两个以上宾语从句时，that不省。
引导主语从句时常可用it 作形式主语That light travels in straight lines is known to all.众所周知光是以直线运行的。
（主语从句）=It is known to all that light travels in straight linesThe reason for his absent was that he was ill.他缺席的原因是他病了。
（表语从句）I think( that) you are right.我认为你是对的。
（宾语从句）The news that our football team has won is true.我们足球队赢了的消息是真的。
（同位语从句）注意区别：The news( that/which) he told me is true.他告诉我的消息是真的。
（定语从句）2.what 引导的名词性从句，what 在从句中必须要作主语，宾语，表语,常译作“所---的”或“什么”,what 一般不引导同位语从句What we need is water.我们所需要的是水。
（主语从句）What we need are useful books.我们所需要的是有用的书。
（主语从句）This is what I want to say.这就是我想说的。
（表语从句）Please tell me what she is saying.请告诉我她在说什么。
（宾语从句）3.how,where,when,why,等引导的名词性从句，保留疑问词的原意，或译为-“--的地方”“---的时候”Do you know how he came here?By bus.你知道他是怎么来的吗？乘公共汽车。
(完整版)名词性从句讲解与练习答案解析版
名词性从句在句子中起名词作用的从句叫名词性从句。
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，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、同位语从句。
引导名词性从句的词叫做连接词，包括：1. 连词（在名词性从句中只起连接作用，不作成分）2. 连接代词（在名词性从句中作主语、宾语或表语）3. 连接副词（在名词性从句中作状语）所有的名词性从句的语序都是陈述句语序。
主语从句：是在主句中作主语的从句。
它由连接词引导，通常位于谓语动词之前。
连接词：1. 连词：在从句中不充当任何成分，常见的引导主语从句的连词有that, whether。
That he got the first prize excited him much.他获得一等奖一事使他非常兴奋。
It is doubtful whether we can get there on time.我们能否按时到达那儿还不确定。
1）that引导的主语从句：在从句中不作任何成分，也没有实际意义。
一般情况下that不可省略。
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.你不喜欢他不关我的事。
2）whether引导的主语从句：常置于句首，表示“是否”之意；if一般不引导主语从句。
Whether he can finish his task on time is of greatimportance.他是否能按时完成任务非常重要。
Whether you can succeed or not depends on how hard you work at it.你能否成功取决于你努力的程度。
连接代词：在从句中起名词或代词的作用，常作从句的主语、宾语、表语或定语，有具体意义且不能省略。
名词性从句专项练习题及答案详解含答案解析
名词性从句专项练习题及答案详解含答案解析一、初中英语名词性从句1．They lost their way in the forest, and ________ made matters worse was that night began to fall.A. itB. whichC. thatD. what【答案】 D【解析】【分析】句意：他们在森林里迷路了，情况更糟糕的是天又黑了。
本题中含有一个主语从句what made matters worse，其中的what引导起这个主语从句，同时在主语从句中做主语。
故选D。
【点评】考查名词性从句，本题涉及what引导的主语从句的应用。
2．It was he said disappointed me.A. that; whatB. what; thatC. that; whichD. which; that【答案】 B【解析】【分析】句意：正是他说的话让我很失望。
这是一个强调句型,"it is/was that..."是固定搭配,"what he said"是被强调部分, 你可以发现去掉"it was that"后, 句子仍然完整。
"what he said"做主语,主语从句中"said"缺宾语用what补足，故选B。
【点评】考查主语从句的强调形式。
3．______ has caused great confusion is ______ he made it without anyone else's help. A. What; that. B. What; how. C. It; how. D. It; that.【答案】 B【解析】【分析】句意：让人极大困惑的是他如何在没有别人帮助的情况下做到这一点的。
表示“让人困惑的事情”用what引导主语从句，表示“如何做到的”用how表方式，引导表语从句。
(英语)必备英语名词性从句技巧全解及练习题(含答案)及解析
（英语）必备英语名词性从句技巧全解及练习题(含答案)及解析一、初中英语名词性从句1．_______ caused the accident has not been found out yet.A. WhatB. WhichC. The thingD. That【答案】 A【解析】【分析】句意：造成事故的原因还没有查明。
此处为主语从句，从句中缺少主语，应该用what引导，故答案为A。
【点评】考查主语从句。
以及what的含义。
2．While some behaviors may seem strange to you, remember you consider normal probably seems just as unusual to others.A. it; thatB. what; thatC. that; whatD. which; that【答案】 C【解析】【分析】句意：虽然有些行为对你来说可能很奇怪，但请记住，你认为正常的行为对别人来说可能也不寻常。
第一空为宾语从句，从句结构完整用that起连接作用，第二空为主语从句，从句中consider缺少宾语，应该用what，故选C。
【点评】考查名词性从句，本题涉及that引导的宾语从句和what引导的主语从句。
3．________ is known to us all that the old scientist, for ________ life was hard in the past, still works hard in his eighties.A. As; whoseB. It; whoseC. As; whomD. It; whom【答案】 D【解析】【分析】句意：我们都知道，那位老科学家，过去生活很艰苦，到了八十多岁还在努力工作。
第一空it is known to us all that…是个固定句型，意为“众所周知…”；第二空为介词+关系代词引导的定语从句，先行词the old scientist指人，作介词for的宾语，只能用whom，故选D。
九年级英语 名词性从句专项讲解及练习含答案解析
九年级英语名词性从句专项讲解及练习含答案解析一、初中英语名词性从句1．______ amazed the NBA world is ______ Kobe Bryant scored 81 points just in one game.A. That, whatB. What, thatC. That, thatD. What, what【答案】 B【解析】【分析】句意：使NBA世界惊讶的是Kobe Bryant在一场比赛中得了81分。
根据句意可知，句子主语是一个主语从句，引导词即起引导作用又要做从句的一个成分，所以第一空填What；第二空是that引导的表语从句，只起引导作用，故选B。
【点评】考查名词性从句，本题涉及关系代词what引导的主语从句和表语从句的应用。
2．_____ is known to us all is that China has launched Shenzhou VII spaceship, ____ made the country's first spacewalk successful.A. That; whatB. What; whichC. It; whichD. As; that【答案】 B【解析】【分析】句意：众所周知，中国已经发射了神州7号宇宙飞船，这是中国首次成功的太空行走。
第一空处为主语从句，从句缺少主语，需用what引导；第二空所在句子是个定语从句，先行词为整个主句的内容，从句中缺少主语，需用which引导。
故选B。
【点评】考查名词性从句和定语从句，本题涉及主语从句和非限制性定语从句的应用。
3．_________ is known to all is that the earth is smaller than the sun.A. AsB. WhatC. ItD. Which【答案】 B【解析】【分析】句意：众所周知，地球比太阳还小。
复合句的主语是一个名词性从句，从句没有引导词和主语，表示“所……的（事）”，故用what引导，其双重作用，故选B。
名词性从句讲解及专项练习习题及其解答(可编辑修改word版)
名词性从句讲解在复合句中起名词作用的从句叫做名词性从句。
它包括主语从句、宾语从句、表语从句和同位语从句。
名词性从句是中学阶段的一个重要语法项目，在历年的高考中几乎都涉及到，并且每年的命题各有变化。
分析历届高考试题名词性从句考查的焦点主要有以下六个方面1. 考查名词性从句的语序问题2. 考查引导词that 与what 的区别3. 考查it 在名词性从句中作形式主语或形式宾语的用法4. 考查whether 与if 的区别5. 考查名词性从句中的疑问词+ever 引导的名词性从句与no matter+疑问词引导的状语从句的区别6. 考查名词性从句的虚拟语气问题语法要点剖析一、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, 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：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。
高中名词性从句精简讲解与练习(含答案)
名词性从句用法详解一、概说名词性从句，即指性质相当于名词的从句，它包括主语从句、宾语从句、表语从句和同位语从句。
从高考的考查的实际情况来看，名词性从句考得最多的是宾语从句，其次是主语从句，再次是表语从句，而同位语从句则很少考查。
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二、名词性从句的一般引导词1. 连接词that 只起连接作用，没有任何意思，也不充当句子成分，在宾语从句中可省略，但引导其他名词性从句时通常不省略。
I hope (that) you enjoy your holiday. 希望你假期过得好。
（宾语从句）That he likes you is very obvious. 很显然他喜欢你。
（主语从句）2. 连接词whether 也不充当句子成分，但有自己的意思，表示“是否”；引导宾语从句时，可换成if，但引导其他名词性从句时不能换成if。
如：He asked whether [if] I would show him the way. 他问我是否可以给他带路。
Whether it will do us harm remains to be seen. 是否对我们有害还要看一看。
(引导主语从句，不能用if 代替whether)3. 连接代词who(m), whose, which, what 等，均有各自的意义，在从句中作主语、宾语、定语等。
如：That’s what she wanted to do. （表语从句）Who will help us is not known. （主语从句）Tell me which one you like best. （宾语从句）4. 连接副词when, where, why, how 等，也各自有自己的意义，在从句中作状语。
(完整版)高中名词性从句全面讲解及练习(含答案)
高中英语讲义---- 名词性从句（主从、表从、宾从，同从）1，陈述句做名从用连词that + SV, that 表主句肯定从句完整，不做成分。
主从可用it 做形式主语，宾从第一个that 可省略。
You study hard.主从：That you study hard is known to us.= It is known to us that you study hard.表从：My opinion is that you study hard .宾从：I think (that) you study hard. …and that (不能省略)….同从：My opinion that you study hard is known to us. *比较同从和主从！●一般抽象名词后对其进行解释和说明的完整句子就是其同位语从句，不完整就是定语从句。
I appreciate your idea that we have an exam every week. （that后完整—同从）I appreciate your idea that you came up with last time.（that后不完整---定从）2，一般问句做名从用连词whether(是否) + SV，whether表主句不肯定从句完整，宾从中可用if（介词后或宾从后有or not时只用whether）。
Does your friend like English ?主从：Whether your friend likes English isn’t clear .=It isn’t clear whether your friend likes English.表从：My question is whether your friend likes English.宾从：I don’t know whether/ if your friend likes English.同从：My question whether your friend likes English isn’t clear.3, 特殊问句做名从用疑问词（连词）+ SV, 疑问词做主语时直接+谓语。
名词性从句专题(含答案)含答案解析
名词性从句专题(含答案)含答案解析一、初中英语名词性从句1．____ he will offer us enough help doesn't matter a lot to our success.A. IfB. WhetherC. BeforeD. How【答案】 B【解析】【分析】句意：他是否提供帮助对于我们的成功没有什么关系。
If不可以引导主语从句，故选B。
【点评】考查名词性从句，本题涉及whether引导的主语从句的应用。
2．It was he said disappointed me.A. that; whatB. what; thatC. that; whichD. which; that【答案】 B【解析】【分析】句意：正是他说的话让我很失望。
这是一个强调句型,"it is/was that..."是固定搭配,"what he said"是被强调部分, 你可以发现去掉"it was that"后, 句子仍然完整。
"what he said"做主语,主语从句中"said"缺宾语用what补足，故选B。
【点评】考查主语从句的强调形式。
3．Exactly _________ the potato was introduced into Europe is uncertain, but it was probably around 1565.A. whetherB. whenC. whyD. how【答案】 B【解析】【分析】句意：土豆被引进欧洲具体的事件不被确定，但是可能是在1565年左右。
根据时间状语round 1565得知这里是指时间不确定。
故选B。
【点评】考查名词性从句，本题涉及when引导的主语从句。
4．They lost their way in the forest, and ________ made matters worse was that night began to fall.A. itB. whichC. thatD. what【答案】 D【解析】【分析】句意：他们在森林里迷路了，情况更糟糕的是天又黑了。
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名词性从句在句子中起名词作用的从句叫名词性从句。
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，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、同位语从句。
引导名词性从句的词叫做连接词，包括：1. 连词（在名词性从句中只起连接作用，不作成分）2. 连接代词（在名词性从句中作主语、宾语或表语）3. 连接副词（在名词性从句中作状语）所有的名词性从句的语序都是陈述句语序。
主语从句：是在主句中作主语的从句。
它由连接词引导，通常位于谓语动词之前。
连接词：1. 连词：在从句中不充当任何成分，常见的引导主语从句的连词有that, whether。
That he got the first prize excited him much.他获得一等奖一事使他非常兴奋。
It is doubtful whether we can get there on time.我们能否按时到达那儿还不确定。
1）that引导的主语从句：在从句中不作任何成分，也没有实际意义。
一般情况下that不可省略。
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.你不喜欢他不关我的事。
2）whether引导的主语从句：常置于句首，表示“是否”之意；if一般不引导主语从句。
Whether he can finish his task on time is of greatimportance.他是否能按时完成任务非常重要。
Whether you can succeed or not depends on how hard you work at it.你能否成功取决于你努力的程度。
连接代词：在从句中起名词或代词的作用，常作从句的主语、宾语、表语或定语，有具体意义且不能省略。
常见的连接代词有who, whom, whose, what, which,whoever, whomever, whatever, whichever。
What we should do with the problem is undecided.我们如何处理这个问题还未作出决定。
（what引导主语从句，不表疑问意义）Whom the letter was from is still unknown.这封信是谁邮寄的还不清楚。
连接副词：在从句中起副词的作用，常作从句的状语，表示时间、地点、原因、方式等。
常见的连接副词有when, where, how, why, whenever, wherever, however等。
Why he did that wasn't quite clear.他为什么做那件事还不十分清楚。
Where we can look up his address is still a problem.我们在哪儿可以查他的地址还是个难题。
注意：it代替主语从句作形式主语that从句作主语通常用it作形式主语，而将that从句置于句末。
常见的it替代主语从句的句式主要有以下几种：1）It + 系动词 + 形容词 + that从句It is quite clear that the whole project is doomed to failure.很清楚，整个计划注定要失败。
It is likely that there will be a snowstorm tomorrow.明天很可能会有一场暴风雪。
2）It + 系动词 + 名词 + that从句常见的用于此结构的名词有：a pity（遗憾），a shame（遗憾，耻辱），a fact（事实），an honor（荣耀），a wonder（奇迹），no wonder（难怪），good news（好消息）等。
It's no wonder that you've achieved so much success.难怪你已取得了如此大的成功。
It's a pity that you didn't attend their wedding.你没有参加他们的婚礼真是遗憾。
3）It + 系动词 + 动词的过去分词 + that从句It is said that no passengers were injured in the accident.据说在那次意外事故中没有乘客受伤。
It is announced that the plan has been successfully carried out.据宣布计划已被顺利实施。
4）It + 特殊动词+ that从句常用于这种结构的动词有：seem（看上去），appear（显得），happen（碰巧），matter（关系重大），turn out（结果），occur to sb. （某人突然想起）等。
It seems to me that he objects to the plan.在我看来，他好像反对这个计划。
It happened that I met an old friend on the street yesterday.昨天我碰巧在街上遇见了一位老朋友。
II 宾语从句：在主句中起宾语作用的从句称为宾语从句。
宾语从句可分为动词的宾语从句、介词的宾语从句和形容词的宾语从句。
1. 连词that, if/ whether引导的宾语从句引导宾语从句时，that, whether/if 都只起连接作用，在从句中不作任何成分。
that无实义，在句子中可以省略；Whether/if 意为“是否”，不可省略。
He said (that) he couldn't finish his work before dusk.他说黄昏之前他完不成任务。
Nobody knows whether/ if he likes school or not.没有人知道他是否喜欢上学。
注意：whether/ if都意为“是否”。
一般情况下，它们可以互换，口语中常用if，但在以下情况中，只能用whether：1）与or not 紧接连用时。
如：Let me know whether or not you can come.请让我知道你是否能来。
2）作介词的宾语从句时。
如：We are interested in whether you will attend the meeting.我们对你是否会参加会议感兴趣。
3）引导主语从句、表语从句与同位语从句时4）在动词不定式前时。
如：I don’t know whether to go.2. 连接代词引导的宾语从句who, whom, what, which, whomever, whoever, whatever, whichever 等引导宾语从句，并且在宾语从句中充当主语、宾语、表语、定语等成分, 每个连接代词都有自己特定的意义，一般不省略。
Do you know who is in charge of the company你知道谁负责这家公司吗（作主语）Can you tell me which boy is your son你能告诉我哪个是你儿子吗（作定语）What do you think his job is你认为他是干什么工作的（作表语）连接副词引导的宾语从句when, where, why, how, whenever, wherever, however等引导宾语从句，并且在宾语从句中充当状语，表示时间、地点、原因、方式等。
（有时how much, how many等也可引导宾语从句。
每个连接副词都有自己特定的意义，一般不省略。
）The police asked me how the accident happened.警察问我事故是怎么发生的。
（方式状语）I don't know when we will meet again.我不知道我们何时才能再见面。
（时间状语）Do you know where Mr. Brown lives你知道布朗先生住在哪儿吗（地点状语）使用宾语从句的注意事项宾语从句的语序：在宾语从句中要用陈述句语序。
He asked me when we could set out the next day.他问我第二天什么时候可以出发。
Did you find out where she lost her car你查出她在哪里丢的车了吗宾语从句的时态：1）如果主句的谓语是一般现在时，其宾语从句的时态可以是任何适当的时态。
She says (that) she works from Monday to Friday.她说她周一至周五上班。
（从句时一般现在时）She says (that) she will leave a message on his desk.她说要在桌子上留个便条。
（从句是一般将来时）She says (that) she has never been to Mount Emei.她说她从来没有去过峨眉山。
（从句是现在完成时）2）如果主句的谓语是一般过去时，其宾语从句的时态一般要用适当的过去时态（客观真理、事实除外）He said there were no classes yesterday afternoon.他说昨天下午没有课。
（从句是一般过去时）He said that he was going to take care of the baby.他说他会去照看这个婴儿。
He said that they were having a meeting at that time.他说他们那时正在开会。
（从句是过去进行时）3）当宾语从句是表达客观真理和规律的句子时，其时态仍用一般现在时。
The teacher told us that nothing is difficult if we put our heart into it.老师告诉我们，世上无难事，只怕有心人。
He said that light travels much faster than sound.他说光比声传播得快。
解题技巧：1. 动词find, feel, think, consider, make, believe, guess, suppose, assume等后有宾语补足语时，则要用it作形式宾语，而将that 宾语从句后置。
I think it necessary that we take plenty of boiled water every day.我认为每天多喝开水是有必要的。