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1、名词性从句小结定义：句子在主句中充当名词使用叫名词性从句。名词性从句：主语从句，句子作主语宾语从句，句子作宾语表语从句，句子作表语同位语从句，句子作同位语一：主语从句1.必须有引导词2.引导词:(1)that:不做任何成分、不省略；(2)what:在从句中作主语或宾语(3)疑问词：从汉语中能译出who,whenwhere,why,how,whether等(4)“是否”只能用whether,而不用if(5)谓语动词用单数。Thatshewaschosenmadeusveryhappy.Whatweneedismoretim
2、e.Whowillgoisnotimportant.Whetherhewillcomeornotisclearnow.Whenthemeetingwillbeginhasnotbeendecided.Itis+n./adj./-ed+that从句：it形式主语，that从句是真正的主语Itisapitythatyoumissedthefilm.Itisclearthattheybadlyneedhelp.ItisnecessarythatastudentshouldlearnEnglishwell.Itiswell-kn
3、ownthattheearthmovesaroundthesun.Itisorderedthatweshouldstartatonce.二：宾语从句（句子作宾语）1.引导词同主语、表语但不太严格。2.引导词that可省略但带有两个以上的宾语从句时,后面的that不省。3.Whetherif均可用，但有ornot或介词后会引起歧义时只用whether。Ihopethatyouwillhaveabrightfuture.Idon’tknowwhethershewillcomehometomorrow.Wedon’tknow
4、whetherornotIraqwillbeindependentoneday.Hesaid(that)hehadfinishedreadingthisnovelandthathewouldborrowanotherone.表语从句（句子作表语）1.引导词常用that,不做句子成分，但不能省略。2.也可以用how,when,where,why,what来引导ThefactisthatIhavelostmykey.Whatdelighteduswasthatwehadsucceededinsolvingtheproblem
5、.Thetroubleiswherewecangetthethingsweneed.Thequestionishowhedidit.同位语从句（句子作同位语）1.由that引导，不做成分，但不能省略。2.也可以由what,how,when,which,why,who,where等引导。Thefactthathishealthisfallingisnottrue.Ihavenoideahowtheywereabletogetitdoneinsuchashorttime.Thequestionwhoshoulddothewo
6、rkrequiresconsideration.同位语从句和定语从句的区别：1.that引导同位语从句时不做句子成分，不能省略，但引导定语从句时做主语或宾语，做宾语时可省。2.which引导同位语从句时翻译成“哪一个”，但引导定语从句时在句中做主语或宾语，没有“哪一个”的意思。Thenews(that)hetoldmeisnottrue.Thenewsthathewouldcomeisnottrue.关联词that和what的用法比较：1.that可以引导名词性从句，也可引导定语从句，而what不能引导定语从句。2.th
7、at在名词性从句中不做句子成分，而what在名词性从句中做主语或宾语。whoever,whatever引导的名词性从句Whoeverwantsaticketforthefilmmayhaveone.Whoeverwantstogotheremustsignuphere.Whateveryousaywillinterestusall.Youcantakewhateveryoulike.区别whatever和nomatterwhatwhatever既能引导名词性从句，又能引导状语从句nomatterwhat只能引导状语从句W
8、hateverhappens,don’tbesurprised.=nomatterwhatWhateveryousaywillinterestusall.=nomatterwhatFillintheblankets:1.____hegotthefirstprizemadeallofussurprised.2.____
