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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。
高中英语语法讲解——名词性从句一、名词性从句的三类连词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。
根据这些从句的共同特性，名词性从句的连词主要可以分成三类：that, if/ whether和wh-(疑问词)。
1．如果一个陈述句被用来作为另一个句子的主语、表语、宾语或同位语，那么我们一般要用that作为连词。
that本身在句子中没有意思，只起连接作用。
eg. 陈述句：Science is developing very fast.主语从句：It is known to all that science is developing very fast.表语从句：The fact is that science is developing very fast.宾语从句：Everyone knows that science is developing very fast.同位语从句：The fact that science is developing very fast is known to all.2．如果一个一般疑问句被用来作为另一个句子的主语、表语、宾语或同位语，那么我们要用whether或if作为连词。
whether/ if在句子中的意思是“是否”。
变成名词性从句后，原来的疑问句的词序要改成陈述句的词序（主语+谓语）。
eg. 一般疑问句：Shall we have a meeting this afternoon?主语从句：Whether we shall have a meeting this afternoon hasn’t been decided yet.或：It hasn’t been decided yet whether we shall have a meeting this afternoon.表语从句：The question is whether we shall have a meeting this afternoon.宾语从句：Do you know whether we shall have a meeting this afternoon?同位语从句：None of us can answer the question whether we shall have ameeting this afternoon.注意：原来的疑问句词序在从句中都被改变成陈述句的词序，复合句的标点符号由主句的句型决定。
高中英语名词性从句详细讲解一 . 名词性从句考查的焦点主要有以下六方面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和形式宾语的用法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二 . 名词性从句的含义及连接词名词性从句的含义: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。
引导名词性从句的连接词可分为四类：1.that （无含义，不充当成分）2.whether, if（有“是否”的含义，但不充当成分）3. 连接代词： what,whatever, whomever,whose,which,whichever.who,whoever,（在从句中做主语、whom,宾语、表语和定语）连接副词： when, whenever,where,wherever, how, however,why （在从句中做状语）4.as if,as though,because （不充当成分，在名词性从句中只引导表语从句）三 .四类名词性从句语法要点1.主语从句在整个句子中用作主语的从句叫主语从句。
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。
it作形式主语：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。
名词性从句一．定义：在句子中起名词作用的句子叫名词性从句 (Noun Clauses）。
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、介词宾语等，因此根据它在句中不同的语法功能，名词性从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。
1. His words are true. What he said is true.2. The dog sensed something good. The dog sensed that there was something good nearby.3. These are his words. These are what he said.4. My Maths teacher, Mr He, is a kind person. The news that the plane had crashed made us sad.二．引导名词性从句的连接词连词：在从句中不充当成分，只起连接作用 that, 无实义whether, if 是否as if \ as though 似乎，好像连接代词：有词义，在句中担任主语，表语，定语或宾语。
what, 什么 who, 谁whom, 谁，作宾语 whose, 谁的 which, 哪一个whatever, whoever……也可以引导。
连接副词：有词义，在句中担任状语。
when ,什么时候 where, 什么地方 why, 为什么 how ,怎么样how many, how much, how often三．主语从句1. 作句子主语的从句叫主语从句。
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。
That he is late for school makes the teacher very angry. 他上学迟到让老师很生气。
高考英语名词性从句知识讲解名词性从句是指在复合句中起名词作用的句子，功能相当于名词词组。
名词性从句在复合句中能作主语、宾语、表语、同位语等，根据在句中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。
一、主语从句【定义】在复合句中，作主语的句子称为主语从句。
常见的连接词：（连接词在句中不能省略）that, whether, who, what, whatever, whoever, where, when, why, how等。
【用法】1.连接词 that 引导That we should learn English well is very important.主语从句中 we should learn English well句子完整，不缺成分，用that引导，that 不能省连接词whether，if 引导whether 引导的主语从句可放句首，也可放句中，表“是否”if 引导的主语从句只能引导动词后的宾语Whether I will go or not depend on the weather.It remains to be seen whether / if they can finish the task in time.2.连接代词what, who, which, whose, whatever, whichever，whoever等引导What matters most is your attitude.3.连接副词when，where，why，how等引导How he made it is still unknown.4.it作形式主语为了避免句子头重脚轻，通常把形式主语it放在句首，真正的主语放在句子后面。
常见句型：(1) It is + n.+ that + 句子It is +（a pity / a shame / a fact …）+ that ...(2) It is + adj.+ that + 句子It is +（true / clear / important …）+ that ...(3) It is + 过去分词 + that + 句子It is+ said / announced / expected / believed / hoped… + that ...(4) It seems /appears / happens / turned out that + 句子(5) It hit sb./occurred to sb.that + 句子二、宾语从句【定义】在复合句中，作宾语的句子称为宾语从句。
名词性从句1.种类2.宾语从句的时态。
3.that什么情况下可以省略，什么情况下不可以省略。
4.whether和if什么时候可以互换，什么时候不可以互换。
5.如何区分同位语从句与定语从句。
1.______thebabycouldspeakmadehisparentsveryhappy.2.Iwonder______youwillgoshoppingorstayathome.3.Thisis______hewasoftenlateforschool.4.Weallknowthetruth______theearth______aroundthesun.一．名词性从句的概念：一个句子在连接词的引导下，在句子中起名词作用的句子叫名词性从句。
二．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、介词宾语等。
Hisjobisimportant.(主语)Whathedoesisimportant.(主语)Thisishisjob.(表语)Thisiswhathedoeseveryday.(表语)Idon’t likehisjob.(宾语)Idon’t likewhathedoeseveryday.(宾语)Idon’tknowabout thefactthatheisateacher.(同位语)Idon’tknowabout theman,Mr.White.(同位语)得出结论：因此根据它在句中不同的语法功能，名词从句又可分为四类，即：主语从句、宾语从句、表语从句和同位语从句。
三．引导名词性从句的连接词：1、连接代词：who,whoever,whose,whom,whomever,what,which。
有词义，在从句中担任成分，如主语、表语、宾语、或定语等。
●Idon’tbelieve__________hehasachievedsofar.●__________breaksthelawshouldbepunished.2、连接副词：when,where,why,how。
有词义，在从句中担任成分，作状语。
●__________wewillhandintheprojectwillbediscussedlater.●Parentsarethoughttounderstand__________importanteducationistotheirchildren’sfuture.●Thereason__________hewasabsentwasthathewasill.3、连接词：that,whether,if,asif,asthough。
that无词义，在从句中不担任成分，有时可省略；if(whether),asif虽有词义，但在从句中不担任成分。
●Idon’tcareabout__________youhavemoneyornot.●Theproblemis__________Tomisabletoarriveontime.●__________themeetingwillbeheldhereisnotdecidedyet.●Itlooks__________itisgoingtorain.●Thetruthis__________hedidn’tcomefortheconcert.●__________theearthisroundistrue.四．名词性从句的类型：1.主语从句：在复合句中作主句的主语。
连接词有that,whether;who,what,which;when,where,how,why等。
如:●__________heisafamoussingerisknowntous.●__________hewillgotoAmericaisnotyetfixed.●__________she’scomingornotdoesn’tmattertoomuch.●__________broketheglassyesterdayisnotclear.注意：1.为避免主语冗长,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。
记住以下it作形式主语的句型：e.以it作形式主语，把主语从句后置的常见句型有：1.Itis+名词+从句It'sapity/shamethat…很可惜/很遗憾……It'snosurprise/wonderthat…毫不奇怪/很正常……2.Itis+形容词+从句It'scertain/uncertain/obviousthat……肯定…/不确定/显然……It'slikely/possible/probablethat…有可能……3.Itis+过去分词+从句It'ssaid/reported/thought/believethat…据说/据报道/大家认为/人们相信……4.It+不及物动词+that不及物动词有seem/happen/appear/occur/doesn’tmatter/makesnodifference5.Ithappensthat…碰巧……●Itworriedherabit______herhairwasturninggrey.●Itremainsaquestion______wecangetsomuchmoneyinsuchashorttime.●Itisknowntous______wherethereispollution,thereisharm.2.单个的主语从句作主语时，谓语动词用句单数形式；如果是两个或两个以上的主语作主语，谓语动词用复数。
Whenandwherehewasbornhasn’tbeenfound. Whenhewasbornandwherehewasbornhaven’tbeenfound.Exercises:●.______makesthisshopdifferentisthatitoffersmorepersonalservices.●______Icanpaybackthehelpthatpeoplegivememakesmeveryhappy.●It’snotclear______wasresponsiblefortheaccident.●______intheregulationsthatyoushouldnottellotherpeoplethepasswordofyoure-mail account.A.WhatisrequiredB.WhatrequiresC.ItisrequiredD.Itrequires2.表语从句：在复合句中作主句的表语。
引导词有连词that,whether,asif,asthough;who,what,which,whose;when,where,how,why,because等。
如:●Theproblemis_________wedidn’tgetintouchwithhim.●Thisis_________Henrysolvedtheproblem.●Hissuggestionis_________we(should)finishtheworkatonce.●Itlooked_________itwasgoingtorain.●Thereason_________wedidn'ttrusthimis_________hehasoftenlied．注意：1.如果句子的主语是suggestion,advice,order,demand,proposal等名词时,后面引导的表语从句用should+动词原形,should可省略。
他的建议是我们应该马上完成工作.Hissuggestionisthatwe(should)finishtheworkatonce.2.Thereasonisthat……的理由是，…的原因是…Thereason__________hewaslateagainwas__________hewascaughtinthetrafficjam.3.Itisbecause…这是因为…Exercises:●Thisis______shewasborn.●Thequestionis______wecan’tgotheretoday.●Myadviceisthathe______(go)toschoolbybike.●______shecouldn’tunderstandwas______fewerandfewerstudentsshowedinterestinherlessons.●Energyis______makesthingswork.3.宾语从句：在复合句中作主句的宾语。
引导词有连词that,whether,if;who,whom,whose,what,which;when,where,how,why等。
如:(1)V+宾语从句，即“动宾”：Webelievethatheishonest./Iaskediftheyhadacheapsuit./Canyoutellmewhichdictionaryishers?/Ireally don’tknowwhatheisdoing.●Ijustdon’tunderstand______thatpreventssomanyAmericansfrombeingashappyasone mightexpect.A.whyitdoesB.whatitdoesC.whatitisD.whyitis●---Don’tyoubelieveme?---______,Iwillbelieve______yousay.A.No;whateverB.Yes;nomatterwhatC.No;nomatterwhatD.Yes;whatever●“Whatdidyourparentsthinkaboutyourdecision?”“Theyalwaysletmedo______Ithink Ishould.”A.whenB.thatC.howD.what.(2)prep+宾语从句，即“介宾”：He’spleasedwithwhatwedidyesterday./Payattentiontowhattheteachersaid.●Iwishtohaveafriendwith______sharesmyhobbiesandinterests.A.whomeverB.nomatterwhoC.whoeverD.anyone●Marywroteanarticleon______theteamhadfailedtowinthegame.A.whyB.whatC.whoD.that●Itwasamatterof______wouldtaketheposition.A.whoB.whoeverC.whomD.whomever(3)adj+宾语从句，即“形宾”：I’msurethatmybrotherwilllovethejacket./Iamgladthatyoucancomeandhelpme.不能误将”It+be+adj+that”的主语从句当成宾语从句.如：ItisnecessarythatweshouldlearnEnglishwell.注意：(1)whether与if都可以引导宾语从句，常可互换。
