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名词性从句知识点梳理第一节相关概念一、定义：在复合句中相当于一个名词，做主语、宾语、表语、同位语的从句。
二、引导词：1. 连词: that, if, whether, as if2. 连接代词: who , what, which, whose, whom以及whoever, whatever, whichever等3. 连接副词: when, where, why, how，whenever, wherever, however等三、各类名词性从句的特征：主语从句表语从句宾语从句同位语从句练习：辨别下列名词性从句的类别。
1.How the book will sell depends on its author.2.John said that he was leaving for London on Wednesday.3.The fact is that he has not been seen recently.4.The fact that he has not been seen recently disturbs everyone in his office.5.He will talk to us about what he saw in U.S.6.It is impossible that I go and attend the meeting.第二节主语从句1．定义：在复合句中作句子主语的从句叫做主语从句。
2．连接词：引导主语从句的连接词有三类：连词that、whether;疑问代词who, what, which，whom, whose, whatever, whoever, whomever, whichever;疑问副词when, where, how, why，however, whenever, wherever等⑴连词that（无词意）, whether(是否), 在从句中不充当句子成分，只起连接作用; whether能引导主语从句，而if不能。
高考一轮复习--- 名词性从句I.什么是名词性从句?在句子中起名词作用的句子叫名词性从句。
名词从句的功能相当于名词词组, 它在复合句中能充当主语、宾语、介词宾语、表语、同位语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。
（判断下列划线部分属于哪种从句）You’ll find taxis waiting at the bus station that you can hire to reach your host family.That’s the new machine whose parts are too small to be seen.I don't believe we've met before, although I must say you do look familiar.What they have said made me happy.I am afraid of what will happen in 2012.My dream is that I will be a teacher one day.The topic that my parents are talking about is very interesting.●主语从句：（用横线划出句子中的主语从句）That he will come and help us is certain．Whether it is true remains a question.Who will do the job has not been decided．When we shall have our sports meet is still a question．用it作形式主语的that-从句有以下四种不同的搭配关系：a. It + be +形容词/名词+ that-从句It is certain that your son will do well in his exam．It is doubtful whether the manager knew the details of the plan．b.It + be +名词+ that-从句It is a pity that you didn’t attend the lecture yesterday．It is a surprise that he should win the first prize in the contest.c. It + be + -ed 分词+ that-从句It is said that the professor has already succeeded in carrying out this experiment．It is suggested that each student(should)sing a song in English．d. d. It +不及物动词+ that-分句It seems to me that you object to the plan．It happened that I was not there that day．It suddenly occurred to him that the keys might be left in the car．●宾语从句：（用横线划出句子中的宾语从句，并归纳其类型）Richard hopes (that) the teacher won’t ask him a question．The teacher suggested that we should call off the plan．Success depends on whether we make enough effort．I’m afraid that we can’t get to the airport on time.I’m sure that he’ll win the match..想一想：哪些词后面可能跟宾语从句呢？I think it important that young people master two languages．I consider it necessary that he should improve his pronunciation.I would appreciate it if you could give me the chance.I hate it when someone is talking with their mouth full.You can depend on it that he can manage it.I am counting on it that you will come．She took it for granted that you knew the matter．See to it that the door is safely locked before you go．●表语从句（用横线划出句子中的表语从句，并归纳其类型）My decision is that all of us are to start at 6 o’clock tomorrow morning.The patient looked as if he had been ill for a long time．The reason why she called me is that she will not attend the party．His suggestion is that we(should)set off at once．●同位语从句定义：放在belief; fact; hope; idea; news; report; message; opinion; possibility; problem; suggestion等抽象名词后，用来对这些名词的具体内容作进一步的解释说明，多用that 引导。
专题三名词性从句1。
（2019·全国卷Ⅰ,61)While they are rare north of 88°， there is evidence ________ they range all the way across the Arctic， and as far south as James Bay in Canada.答案:that 分析句子结构可知,所填词引导同位语从句，解释说明evidence的具体内容，从句中不缺少成分且意义完整，故用that引导。
2．(2019·江苏高考，25)Scientists have obtained more evidence ________ plastic is finding its way into the human body。
答案：that 句意：科学家已经获得了更多的证据，证明塑料正在进入人体。
分析句子结构可知，空格处引导同位语从句，解释说明evidence的具体内容，从句中不缺成分，故用that引导。
3．（2018·全国卷Ⅲ，61)I’m not sure ________ is more frightened，me or the female gorilla （大猩猩) that suddenly appears out of nowhere。
答案：who 分析句子结构可知,宾语从句中缺少句子的主语，由下文“me or the female gorilla （大猩猩）"可知，作者不确定自己和大猩猩谁更害怕,故填who。
4．（2018·北京高考，11)Without his support, we wouldn't be ________ we are now.答案：where 句意：如果没有他的支持，我们不可能有今天的地位。
结合句意可知，应用where引导该表语从句，表示抽象概念。
高考英语一轮复习——名词性从句（附答案）I. 考点分析名词性从句包括：主语从句、宾语从句、表语从句、同位语从句，多由连词that，wh- 疑问词或由what，whatever等关系代词引导，其中同位语从句在高考考试中最常见。
1. 主语从句1) 主语从句在句子中充当主语，句子的谓语动词用第三人称单数。
如：Why he refused to work with you is still mystery.Whoever comes is welcome.2) 主语从句前的that不能省略，仅起连接作用，有时为了保持句子平衡，that从句后置，而由it作形式主语。
如：That he became a lawyer may have been due to his mother’s influence.It is not true that he has moved to New York.2. 宾语从句在句子中充当宾语，如：I don’t know where the sound came from.Don’t be satisfied with what you have achieved.3．当从句放在系动词be, look, remain, seem等后即构成表语从句。
The trouble is that I have lost his address.It seemed that the night would never end.4. 1) 同位语从句是对与之同位的名词中心词作进一步解释，能接名词性从句的常见名词有: idea, fact, news, belief, hope, evidence, opinion, problem, truth, answer, proposal, theory, decision, discovery, problem, thought, understanding 等。
高考英语一轮复习（语法）——名词性从句名词性从句包括：主语从句、表语从句、宾语从句和同位语从句。
引导名词性从句的连词有：A.连词：that, whether, if（这三个词都不作从句的成分，同时，that无含义，而whether和if都表“是否”）B.疑问代词：who, whom, whose, what, whichC.疑问副词：when, where, why, how（一）主语从句在复合句中充当主语的从句。
1.that引导主语从句that引导主语从句时不同于其他的连词，既无词义也不作成分，只起单纯的连接作用，且通常不可以省。
为了强调that引导的主语从句而置之于句首时，that不可省。
①That the driver could not control his car was obvious.②That she was chosen made us very happy.③That he will come is certain.④That he would take the risk is true.⑤That he should have married her isn't surprising.★通常，that引导主语从句时用it做形式主语，把从句置于句尾，此时that 有时可省。
例如：①It was obvious that the driver could not control his car.②It made us very happy that she was chosen.③It is certain that he will come.④It is true that he would take the risk.⑤It isn't surprising (that) he should have married her.★如果以that从句为主语的句子是疑问句，就只能用先行词it结构。
高考英语一轮复习专题三Noun Clauses (名词性从句）定义：在复合句中充当主语、宾语、表语、同位语的句子叫名词性从句。
名词性从句的功能相当于名词，根据它在句中不同的语法功能，可分为主语从句、宾语从句、表语从句和同位语从句。
请你找出以下名词性从句并说出它们的成分：(1) Why they suddenly disappeared still remains a mystery. （主语从句）(2) The fact is that I earned my passage by working as an unpaid hand. （表语从句）(3) I didn’t know whether I could survive until morning. （宾语从句）(4) The thought that they could cross the whole continent was exciting.（同位语从句）名词性从句的常用连接词1.连接词：that（无意义）、if，whether（是否）、as if/though（好像、似乎）、because （因为）等(不作成分）2.连接代词：who、whom 、whoever 、whose、what、whatever 、which、whichever （作主/宾/表/定）3. 连接副词：when、where、why、how （作状语）一、主语从句1.引导主语从句的连接词有三类：(1) 连词that，whether：Whether we go by train or by boat makes no difference.我们坐火车或者坐船去没有差异。
Whether he’ll come here isn’t clear.他是否来这儿还不清楚。
That price will go up is certain.价格将上涨是肯定的。
(2) 连接代词who, whom, whose, what, which, whoever, whatever, whichever等What she did is not yet known.她干了什么尚不清楚。
Who will attend the meeting has not been decided yet.谁去参加会议还没有确定。
Whatever he did is right.他所做的一切都是对的。
(3) 连接副词 where, when, how, why等。
How this happened is not clear to anyone.谁也不清楚这事是怎样发生的。
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.金字塔是怎样建成的仍然是个谜。
2.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:(1)That we shall be late is certain.—It’s certain that we shall be late.(2)That the earth is round is known to all.—It’s known to all that the earth is round.(3)That you missed the chance is a pity.—It is a pity that you missed the chance.3. 用it 作形式主语的常用结构①It is＋名词(no wonder, an honour, a good thing, a pity, no surprise…)＋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②It is+形容词(natural ,obvious, strange, possible, likely, probable…)＋从句It is natural that…很自然……It is strange that…奇怪的是……③It ＋不及物动词＋从句It seems that…似乎……It happened that…碰巧……It appears that…似乎……④It is＋过去分词＋从句It is reported that…据报道……It has been proved that…已证实……It is said that…据说…4.主语从句需注意的问题1.“if”不能引导主语从句，应用“whether”引导。
2. 主语从句中用陈述语序。
3. 主语从句的“that”一般不能省。
4. “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.你留下的只是几本旧书。
What you said is of great importance.你说的话很重要。
Whether he’ll come here is not clear.他是否来这儿尚不清楚。
语法精讲【主语从句】一个句子在另一个句子中充当主语，即句子充当主语，该句子称为主语从句。
根据句意选词填空(that, if, whether, why, when, what)(1)That he will succeed is certain.他最终肯定会成功。
【结论】that－从句，从句为一个句意完整的陈述句，没有具体意义，不充当句子成分，只起标志性作用，但that 不能省略。
(2)Whether he will go there is not known.他去不去那还不知道。
【结论】whether －从句，从句来源于一般疑问句，whether不能省略，意为“是否”，不能用if替换。
(3)What he said is not true.他所说的不正确。
(4)When the meeting will be held has not been decided.会议什么时候举行还没确定。
【结论】特殊疑问词——从句，从句来源于特殊疑问句，特殊疑问词不能省略，意思为特殊疑问词本来的意思，在从句中充当句子成分。
【注意点1】That 2018 Asian Games are successful is known to all.2018亚运会的成功是众所周知的。
【剖析】主语从句作主语相当于第三人称单数作主语，谓语动词用单数，如果由and 连接两个或两个以上的主语从句作主语时，谓语动词用复数；由两个或多个连接词引导一个主语从句，谓语动词用单数。
1.When they will start has (have) not been decided yet.他们什么时候动身还没有确定。
2.When they will start and where they go have(have) not been decided yet.他们什么时候动身以及要去哪里还没有确定。
3.When and where the meeting will begin has (have) not been decided yet.会议什么时候开始以及在哪里开还没有确定。
【注意点2】It is a pity that you didn't go to see the film.你没去看那个电影真是遗憾。
It doesn't interest me whether you succeed or not.你是否成功对我来说兴趣不大。
【剖析】主语从句通常由it充当形式主语，而本身放在句子末尾。
1.It is a pity that you didn't go to see the film. （主语从句）2.It is at dawn that the murder took place. （强调句）【结论】主语从句与强调句型的区别：1．主语从句中的it可以用that从句代替，强调句型不可以。
如：It is a pity that you didn't go to see the film.=That you didn’t go to see the film is a pity.3.强调句型中It is/was和that之间的部分叫被强调部分, 当把It is/was和that 去掉时，被强调部分可以还原到句子适当位置;而在含有主语从句的句子中It is/was和that之间的部分叫表语，不可置于其他位置。
趁热打铁1.___ is a fact that English is being accepted as an international language.A. ThereB. ThisC. ThatD. It2. It was____ that he was born.A. 1993B. a rich familyC. ShiquanD. in Shiquan【注意点3】主语从句不可位于句首的几种情况：1. It is said / reported…结构中的主语从句不可提前。
2. It happens / occurs…结构中的主语从句不可提前。
3. It doesn’t matter how / whether…结构中的主语从句不可提前。
【剖析】It is said that Chairman Xi will visit our school next week. (√)That Chairman Xi will visit our school next week is said. ( ×)It doesn’t matter whether he is wrong or not. (√)Whether he is wrong or not doesn’t matter. ( ×)It occured to him that failed in the examination. (√)That he failed in the examination occured to him. ( ×)【注意点4】what与that在引导主语从句时的区别：what 引导主语从句时在句时在从句中充当句子成分，如主语、宾语、表语，而that不充当任何成分。
例如：a) What you said yesterday is right.b) That she is still alive is a comfort.单项选择1.___ he made an important speech at the meeting was true.A. ThatB. WhyC. WhatD. How2. ___we’ll go camping tomorrow depends on the weather .A .If B. Whether C .That D.Where3.___ is known to us all is that America is a developed country ____ the First World.A. Which; belong toB. As, belonged toC. What; belonging toD. It; belonging to4. It’s known to us all ___ a form of energy .A. water isB. that water isC. is waterD. that water to5. It worried her a bit ___ her hair was turning gray.A. whetherB. thatC. whatD. when6.What I say and think ___ none of your business.A. isB. areC. has D have【宾语从句的种类】1.及物动词(think, believe, know, hope…)＋宾语从句2.介词(on, in, of, with…)＋宾语从句3.表示感情色彩的形容词(sad, happy, afraid, pleased, excited, certain, sure…) ＋宾语从句【小试牛刀】Join the following into Object Clauses and pay attention to the tense and order in the clauses.1.They are good students. He told us.2.Are you from China? He asks me.3.When did he buy the new bike?Can you tell me?4.The sun is bigger than the earth.Our teacher told us.5.What was it that made his mother angry? No one knows.【答案】1. He told us that they were good students.2. He asks me whether you are from China.3. Can you tell me when he bought the new bike?4. Our teacher told us that the sun is bigger than the earth.5. No one knows what it was that made his mother angry.注意1.Whether和if表“是否”都可以引导宾语从句(1)当whether后紧跟or/or not时，不用if。
