主语从句表语从句同位语从句)

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1、主语从句，表语从句，同位语从句主语从句在复合句中充当主语的从句叫做表语从句为了强调主语从句的内容，可以将从句置于句首Thatyouareleavingisapity.Wherehelivesisnotclear.大部分主语从句都可以用it做形式主语1.Itis+名词+that从句It’sapitythatwecan’tgo.ItisafactthatEnglishisbeingacceptedasaninternationallanguage.2.Itis+形容词+that从句Itiscertaint

2、hatshewilldowellinherexam.Itisprobablethathetoldhereverything用it做形式主语3.It+动词+that从句ItseemsthatAliceisnotcomingtothepartyatall.IthappenedthatIwasoutthatday.(=Ihappenedtobeoutthatday)4.Itis+过去分词+that从句ItissaidthatMrGreenhasarrivedinBeijing.Itissaidthat…据说

3、Itisreportedthat…据报道Itiswell-knownthat…Itisannouncedthat…Itisbelievedthat…Itisthoughtthat…Itmustbepointedoutthat…Itmustbeadmittedthat…用it做形式主语5.其他情况Itdoesn’tmatterwhethershewillcomeornotItmakesnodifferencewhereweshallhavethemeetingItsuddenlyoccurredtohe

4、rthatshehadforgottentolockthedoor当that引导的主语从句出现在疑问句时，宜用it做形式主语，而把主语从句置后Isitpossiblethattheymaycompletethetaskaheadoftime?Doesitmatterthathewon’tbeabletocometomorrow.当主语从句出现在感叹句中时，宜用it做形式主语，而把主语从句后置Howstrangeitisthatthestudentsaresoquiet!Itisstrangethatt

5、hestudentsaresoquiet.Whatashameitisthatyoucannotstayfordinner.Itisashamethatyoucannotstayfordinner连接代词what,whoever,whatever,whichever等引导的主语从句不宜用it做形式主语Iswhathetoldusreallytrue?Whicheverofyouwanttocometoourpartywillbewelcome.使用虚拟语气的主语从句在itissuggested/ord

6、ered/requested/insisted…+that从句中，谓语部分用should+动词原形，should常被省略Itissuggestedthatwe(should)doexperimentasecondtime.在itisimportant/natural/necessary…+that从句中Itisimportantthatwe(should)keepthebalanceofnature.在itisfunny/strange/surprising/apity/ashame/nowonder

7、…+that从句中，有时谓语部分用should+动词原形来表达说话者的感情色彩，此时should也可省略Itisapitythatyou(should)misssuchagoodchance.真遗憾，你竟然失去这么好的机会表语从句在复合句中起表语作用的从句叫做表语从句，它一般放在系动词之后Be,look,seem,sound,appear等Chinaisnolongerwhatsheusedtobe.Thequestionremainswhethertheywillbeabletohelpus.Att

8、hattime,itseemedasifIcouldn’tthinkoftherightwordanyhow.As,asif/though引导的表语从句Helookedjustashehadlookedtenyearsbefore.Itsoundsasifsomeoneisknockingatthedoor.Because/why引导的表语从句That’sbecausehedidn’tunderstandme那是因为他不理解我.(强调原因)That’sw