2019-2020年中学英语语法分类复习-名词性从句

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1、2019-2020年中学英语语法分类复习-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

2、that引导的主语从句而置之于句首时，that不可省。①Thatthedrivercouldnotcontrolhiscarwasobvious.②Thatshewaschosenmadeusveryhappy.③Thathewilleiscertain.④Thathewouldtaketheriskistrue.⑤Thatheshouldhavemarriedherisn'tsurprising.★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：①Itwasobviousthatthedriv

3、ercouldnotcontrolhiscar.②Itmadeusveryhappythatshewaschosen.③Itiscertainthathewille.④Itistruethathewouldtaketherisk.⑤Itisn'tsurprising(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：①Isitcertainthathewille?②Isittruethathewouldtaketherisk?▲it做形式主语有以下几种不同的结

4、构：(1)It+be+形容词+that-从句①Itislikelythathewille.②Itisstrangethatshehasevertrustedhim.③Itisimportantthathe（should)attendthemeeting.④Itisbestthathe(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It

5、ismonknowledgethatthewhaleisnotafish...It'sapitythatheshouldhavemassedthetrain.(3)It+be+-ed分词+that从句Itissaidthatheisafamouswriter.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）be

6、heldthisafternoon.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.Itappearsthattheyareinurgentneedofhelp.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，

7、置于句尾时，间或可用if。)Whetherhewillwinthegameisnotclear.Whetherhewilleisuncertain.Whethersheesornotdoesn'tconcernme.Itisnotclearwhether/ifhewille.Itwasuncertainwhetherhewoulde.3.连词代词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.Whowasresponsi

8、blefortheaccidentisnotyetclear.Whosebookitisnotimportant.Whichschoolyouwanttogomattersmuch.4.连接副词when,w