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1、名词性从句在复合句中起名词作用的从句叫做名词性从句。名词性从句主语从句表语从句宾语从句同位语从句主语从句宾语从句表语从句同位语从句I名词性从句的种类1.Whenwewillstartisnotclear.2.MrsBlackwon’tbelievethathersonhasbecomeathief.3.Myideaisthatweshoulddoitrightnow.4.Ihadnoideathatyouwereherfriend.II．语序问题1.Thephotographswillshowyou____．A.whatdoesourvillagelooklikeB.wha
2、tourvillagelookslikeC.howdoesourvillagelooklikeD.howourvillagelookslike2.Heasked____foraviolin.A.didIpayhowmuchB.IpaidhowmuchC.howmuchdidIpayD.howmuchIpaid请你归纳在名词性从句中，除了关联词在从句之首外，其它部分应用______的语序。陈述句Ⅲ.名词性从句的连接词一、主语从句连词that(无词义,不作成分,不能省略);whether(是否),if不能位于句首。Thathewillcomeandhelpusiscertain
3、.Whetherwewillsucceedisstillaquestion.Itisnotknownifhewillcome.注意:已确定的事由that引导;没决定的事由whether引导.3.连接副词when(ever),where(ever),why,how(ever),howlong,howoften,howsoon,howfar,howmany/much等.Whenthetestwillbegivenisnotyetdecided.Howmuchwecanspendmustbeagreedon.2.连接代词what,whatever,who,whoever,whos
4、e,which,whichever等.Whatheishasnothingtodowithyou.Whoseticketthisishasnotbeenfoundout.有时为避免句子头重脚轻，常用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。主句的谓语动词一般用单数形式。常用句型如下：1）It+be+名词+that从句2）It+be+形容词+that从句3）It+be+动词的过去分词+that从句4）It+不及物动词+that从句Itisknowntoushowhebecameawriter.我们都知道他是如何成为一名作家的。Itisapitythat…it’
5、sashamethat…It’snowonderthat…Itissuggestedthat…It’srequestedthat…It’sproposedthat…,It’sdesiredthat…注意:在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时，谓语动词要用虚拟语气“(should)+do”，常用的句型有：ItisnecessaryIt’simportantthatIt’snaturalstrange,etc.)…特殊句式1.Ihate____ whenpeopletalkwiththeirmouthsfull.A.it B.thatC.theseD.the
6、m2.Ifeel____strangethatheshouldbesocareless.A./B.itC.thatD.how3.Itworriedherabit ____herhairwasturninggrey.A．whileB.thatC.if D.for为了使句子保持平衡，常用it来代替主语从句或宾语从句，而把主语从句或宾语从句放到后面，尤其是连词that引导的主语从句常用于此种句式中。归纳主语从句的主谓一致1.主语从句通常被看作一个整体,主句的谓语动词用单数形式.Thattheywillcomeiscertain.2.由who,whoever引导的主语从句的单复数要
7、视从句中的单复数而定.Whoeversaythataretobepunished.Whoaregoingtherehavebeendecided.3.What引导主语从句时,主句谓语动词的单复数由表语的单复数决定.Whathewantsarethesebooks.Whathewantsissomewater.二.宾语从句1.由连词that引导:that常可省略。Itoldhim(that)Iwouldcomebacksoon.注：并列第二个以上的宾语从句,或有插入语时不能省略that.)Hesaid(that)he
