中学英语语法分类复习-名词性从句

《中学英语语法分类复习-名词性从句》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、十五.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。①Thatthe

2、drivercouldnotcontrolhiscarwasobvious.②Thatshewaschosenmadeusveryhappy.③Thathewillcomeiscertain.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：①Itwasobviousthatthedrivercouldnotcontrolhiscar.②Itmadeusveryhappythatshe

3、waschosen.③Itiscertainthathewillcome.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：①Isitcertainthathewillcome?②Isittruethathewouldtaketherisk?▲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①Itislikelythathewillcome.②Itisstrange

4、thatshehasevertrustedhim.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Itiscommonknowledgethatthewhaleisnotafish...It'sapitythatheshouldhavemassedt

5、hetrain.(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）beheldthisafternoon.Itisdemandedthathe(should)leaveatonce.(4)It+seem/happen/appear等不及物动词+t

6、hat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，置于句尾时，间或可用if。)Whetherhewillwinthegameisnotclear.Whetherhewillcomeisuncertain.Whethershecomesornotdoesn'tc

7、oncernme.Itisnotclearwhether/ifhewillcome.Itwasuncertainwhetherhewouldcome.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.Whowasresponsiblefortheaccidentisnotyetclear.Whosebookitisnotimportant.Whichschoolyouwanttogomattersmuch.4.连