主语从句和同位语

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1、NounClauses（二）主语主语在系表结构中是句子陈述的对象，说明是谁或什么Hiswordsareright.Whathesaysisright.主语在主谓宾结构中是执行句子的行为或动作的主体Hisdeedsupsetme.Whathedidupsetme主语从句是在复合句中充当主语的从句,通常放在主句谓语动词之前或由形式主语it代替,而本身放在句子末尾。Whetherhewillcomeornotisnotclear.Itisobviousthatheisthebeststudentintheclass.主语从句的结构ThatTomdiedyest

2、erdayisagreatshocktous.*连词从句系动词表语1.从句做主语2.从句的连词位于从句句首而且不可以省略3.从句陈述语序4.从句被视为三人称单数（有例外）5.从句时态不受主句的限制和影响引导主语从句的连接词词有三类：1)连词that，whether。（不做句子成分）2)连接代词who，what，which（主语和宾语）连接副词when,where,how,why等（状语）根据具体的意思和结构选用不同的连接词*连词的选用*Example.Thatyoumissedthechanceisapity.Whetherhewillcomeisunc

3、ertain.that/whether不做任何成分Wherehehasgoneisunknown.连接副词在从句中作状语Whatyoudoiswrong.连接代词在从句从中做宾语what与that在引导主语从句时的区别what引导主语从句时在句时在从句中充当句子成分,如主语、宾语、表语,定语而that则不然。1)Whatyousaidyesterdayisright.2)Thatsheisstillaliveisgoodnews.连接词的比较宾语不作成分whether引导的主语从句含有是否的意思that引导的主语从句是一个事实Tomcansucceedr

4、emainsunknown.Tompassedtheexammademehappy.连词whetherandthatWhetherThat*特殊词whateverandwhoeverwhatever=anythingthatwhoever=anyonewho不管是谁犯了法,他都应该受到惩罚。Whoeverbreaksthelawshouldbepunished.=Anyonewhobreaksthelawshouldbepunished.WhateveryouchoosewillbeOK.=AnythingthatyouchoosewillbeOK.2主

5、谓一致谓语动词一般用单数无论他说什么都不重要。__________________isofnoimportance.特殊情况一What引导的名词性从句+系动词+名词*WhatIneed____money.=MoneyiswhatIneed*WhatIneed_____books.=BooksarewhatIneed.Whateverhesaysisare主语从句后置Thatweshallbelateiscertain.It’scertainthatweshallbelate.1.Thattheearthisroundisknowntoall.2.That

6、youmissedthechanceisapity.Itisapitythatyoumissedthechance.It’sknowntoallthattheearthisround.It的用法:(形式主语)Itis+形容词+that-clauseIt’spossible/important/necessary/clearthat…Itispossiblethatwecanfinishthetaskontime.Itis+名词+that-clauseIt’sapity/shamethat…很可惜It’safactthat……是一个事实It’snowond

7、erthat…难怪Itisapitythatyoudidn’tcomeyesterday.It+不及物动词+that-clauseItseemsthat…似乎…Itturnedoutthat…结果Ithappensthat…碰巧Itoccurstosb.that某人突然想起**Tomysurprise,itturnedoutthatIwaswrong.让我惊讶的是，最后竟是我错了**ItoccurstomethatIhaven'tfinishedmyhomeworkyet.ItneveroccurredtomethatIwouldmeetLuXun.It

8、+过去分词+that-clauseIt’ssaidthat…据说…翻译：据说他发