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1、【MeiWei_81-优质适用文档】知识要点：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。That
2、thedrivercouldnotcontrolhiscarwasobvious.Thatshewaschosenmadeusveryhappy.Thathewillcomeiscertain.Thathewouldtaketheriskistrue.Thatheshouldhavemarriedherisntsurprising.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：Itwasobviousthatthedrivercouldnotcontrolhiscar.Itmadeusveryhappythatshewaschosen.Itiscer
3、tainthathewillcome.Itistruethathewouldtaketherisk.Itisntsurprising(that)heshouldhavemarriedher.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。例如：Isitcertainthathewillcome?Isittruethathewouldtaketherisk?it做形式主语有以下几种不同的结构：(1)It+be+形容词+that-从句Itislikelythathewillcome.Itisstrangethatshehasevertrustedhim.Itisimportantt
4、hathe(should)attendthemeeting.Itisbestthathe(should)go.此句型在表示惊讶、喜悦、遗憾等感情色彩时，that从句中的谓语动词也常用(should)+v原形。Itisstrangethatnooneshouldhaveobjectedtotheplan.(2)It+be+名词+that-从句Itiscommonknowledgethatthewhaleisnotafish.Itsapitythatheshouldhavecatchedthetrain.(3)It+be+-ed分词+that从句Itissaidthatheisafamouswri
5、ter.Itisreportedthattherewillbeastormthisafternoon.在表示建议、要求、命令等意义的被动结构中，that从句中的谓语动词常用(should)do。（参见虚拟语气部分）Itissuggestedthatthemeeting(should)beheldthisafternoon.Itisdemandedthathe(should)leaveatonce.(4)It+seem/happen/appear等不及物动词+that从句。（look不接that从句，它接tobe结构或形容词）Itseemsthatheiswrong.Itappearsthatt
6、heyareinurgentneedofhelp.Helooks(tobe)surprised/happy/sad.2.whether引导主语从句，意为“是否”，只起连接作用，不充当任何成分。（置于句首时必须用whether引导，置于句尾时，间或可用if。）Whetherhewillwinthegameisnotclear.Whetherhewillcomeisuncertain.Whethershecomesornotdoesntconcernme.Itisnotclearwhether/ifhewillcome.Itwasuncertainwhetherhewouldcome.3.连词代词
7、what,who,which,whose等引导的主语从句。这些连接代词作用相当于代词，在从句中担当主语、宾语、表语、定语等。Whatweneedismoretime.Whowasresponsiblefortheaccidentisnotyetclear.Whosebookitisnotimportant.Whichschoolyouwanttogomattersmuch.4.连接副词when,where,why,how引导的主语从句。这些连接副词相当于副词，在从句中充当状语。Whyhedidthisisnotknown.Whenhewillcomeisstillunknown.Itisnot
8、knownwhyhedidthis.Howhesucceededisunknowntous.Whereweshouldholdthemeetingneedstobediscussed.注意：wh-引导的主语从句也常用it作形式主语。5.也可用whatever,whoever,whomever,whenever,wherever等词引导主语从句，表示“无论什么”、“无论谁”、“无论何时”、“无论在（到）哪里”等。Whoevertoldyoutogiveupsmokingwasquiteright.Whateverhegaveyoushouldbehandedin.Whoevertoldyouth
9、atwaslying.Whoevercomesiswelcome.专项训练：1._makesmistakesmustcorrectthem.A.WhatB.ThatC.WhoeverD.Whatever2.Itworriedherabit_herhairwasturninggrey.A.whileB.thatC.ifD.for3.Whenandwhyhecamehere_yet.A.isnotknownB.arenotknownC.hasnotknownD.havenotknown4._isnoreasonfordismissingher.A.Becauseshewasafewminutesl
10、ateB.OwingtoafewminuteslateC.ThefactthatshewasafewminuteslateD.Beingafewminuteslate5._Tomlikedtoeatwasdifferentfrom_.A.ThatthatyouhadexpectedB.WhatthatyouhadexpectedC.ThatwhatyouhadexpectedD.Whatwhatyouhadexpected6._wegoswimmingeveryday_usalotofgood.A.If.doB.That.doC.If.doesD.That.does7.It_Bobdrives
11、badly.A.thinksthatB.isthoughtwhatC.thoughtthatD.isthoughtthat8.Itsuncertain_theexperimentisworthdoing.A.ifB.thatC.whetherD.how9._theboydidnttakemedicinemadehismotherangry.A.ThatB.WhatC.HowD.Which10._wecantgetseemsbetterthan_wehave.A.What,whatB.What,thatC.That,thatD.That,what(后设答案，大家不要偷看(o)哦，(K_K)嘻嘻)
12、KEYS1. C2.B3.A4.C5.D6.D7.D8.C9.A10.A（二）表语从句：在复合句中充当表语。1.that在引导表语从句时无含义，不作成分，通常不省。1)表示事实、真理等的实际内容。Thefactisthatheislying.Theoddsarethathewillnotdoit.2）表示某人的意见、信念等的实际内容。Ourbeliefisthatthingswillimprove.Thetroubleisthatweareshortofmoney.2.whether引导表语从句（不可用if)。HisfirstquestionwaswhetherHolmeshadarrived
13、yet.Thequestioniswhetherpeoplewillbuyit.3.连接代词who,whom,whose,what,which引导的表语从句。ThisiswhatIwant.Thequestioniswhocanbechosentobemanagerofthecompany.Myquestioniswhichofthemisbetter.4.连接副词when,where,why,how引导的表语从句。Theproblemseemedhowwecouldmakehimunderstandit.Thequestioniswhereweshouldgo.5.asif,asthough
14、引导的表语从句（常用虚拟语气）。Helooksasifhewereangry.Itlooksasifitsgoingtorain.专项训练：1.Thequestionis_wewillhaveoursportsmeetnextweek.A.thatB.ifC.whenD.whether2Thereasonwhyhefailedis_hewastoocareless.A.becauseB.thatC.forD.becauseof3.Goandgetyourcoat.Its_youleftit.A.whereB.thereC.therewhereD.wherethere4Theproblemis_
15、totaketheplaceofTedA.whocanwegetB.whatwecangetC.whowecangetD.thatwecanget5.WhatIwanttoknowis_helikesthegiftgivenbyus.A.thatB.ifC.whetherD.不填6.Thereasonis_Imissedthebus.A.thatB.whenC.whyD.what7.Thatis_wewerelatelasttime.A.thatB.whenC.whyD.what8.Shelooked_sheweretenyearsyounger.A.thatB.likeC.asD.asthough9.-Ifellsick!-Ithinkitis_youaredoingtoomuch.
