Itissadthat...that引导的是什么从句?

　　为你解答,这是主语从句,IT为形式主语,真正主语为THAT后面的从句

　　类似这样主语从句还有下面的,请主语查看,如果满意,请立即采纳,谢谢!

　　高中英语14种复合句精品课程讲解

　　什么叫名词性从句?在句子中起名词作用的句子叫名词从句(NounClauses）

　　名词从句的功能相当于名词词组,它在复合句中能担任主语、宾语、表语、同位语等,因此根据它在句中不同的语法功能,名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句

　　【一】主语从句【二】表语从句【三】宾语从句

　　【四】定语从句【五】同位语从句【六】状语从句

　　【一】主语从句：在主句种充当主语成分的从句叫主语从句,

　　引导主语从句的连词有：从属连词；连接代词；连接副词

　　A从属连词：that,whether.

　　从属连词；that,whether引导的主语从句在主语从句中不充当任何成分,只起连接词的作用,通常不可以省略.分句置于句首时,that绝对不可以省略.如果是由It作形式主语,后面that可以省略.

　　1,有that引导的主语从句如下：

　　1.Thatthedrivercouldnotcontrolhiswarwasobvious.=Itwasobvious（that）thedrivercouldnotcontrolhiscar.

　　2.Thatshewaschosenmadeusveryhappy.=itmadeusveryhappythatshewaschosen

　　3.Thatheisstillaliveissheerluck.=Itissheerluckthatsheisstillalive他还活着全靠运气.

　　4.Thatthewholeprojectisdoomedtofailureisquiteclear

　　=Itisquiteclearthatthewholeprojectisdoomedtofailure.　很清楚,整个计划注定要失败.

　　5.Thatyoushouldhavetoleaveisapity=It'sapitythatyoushouldhavetoleave.　你非走不可真是件憾事.

　　6.Thathewillrefusethispieceofadviceisimpossible.=Itisimpossiblethathewillrefusethispieceofadvice

　　7.Thattheyshouldlikeeachotherisnatural=Itisnaturalthattheyshouldlikeeachother

　　8.Thathewillnotcometothemeetingthiseveningistrue

　　=Itistruethathewillnotcometothemeetingthisevening

　　9.Thathewillhelpothersisafact

　　10.Thattheearthturnsaroundthesunisknowntoall.=Itisknowntoallthattheearthturnsaroundthesun.

　　11.Thatwecanwiniscertain=Itiscertainthatwecanwin.

　　12.Thatyouhavemadeamistakeisafact.=Itisafactthatyouhavemadeamistake

　　13.Itisorderedthatweshouldleaveatonce.=Thatweshouldleaveatonceisordered

　　14.Thatyoudon’tlikehimisnoneofmybusiness.=Itisnoneofmybusinessthatyoudon’tlikehim

　　用it作形式主语的that-从句有以下四种不同的搭配关系：

　　a.It+be+形容词+that-从句

　　Itisnecessarythat…　有必要……

　　Itisimportantthat…　重要的是……

　　Itisobviousthat…很明显……

　　It’scertainthat…肯定…

　　Itispossiblethat...很可能……

　　Itisunlikelythat...不可能……

　　Itisnecessaryimportantnatural...that…

　　Itispossiblethatshewillcomebacktomorrow.

　　Itisobviousthatthismeasureiseffective.

　　b.It+be+Ved分词+that-从句

　　Itisknowntoallthat…　从所周知……

　　Ithasbeendecidedthat…已决定……

　　Itissaidthat……….据说……

　　Itisknowntoallthat...众所周知……

　　Itisreportedthat...据报道……

　　Itisbelievedthat...据信……;人们相信……

　　Itissuggestedthat+(should）do...建议……

　　Itmustbeadmittedthat…必须承认……

　　Itcannotbedeniedthat…不可否认……

　　Itmustbepointedoutthat…需指出的是……

　　Itwasreportedthat20peoplewerekilledintheaccident.

　　Itwassuggestedthatweshouldeatmorevegetableanddomoreexercise

　　c.It+be+名词+that-从句

　　Itisapity/shamethat...遗憾的是……

　　Itisasurprisethat…令人惊奇的是…

　　Itiscommonknowledgethat……是常识

　　Itiscommonknowledgethat…　是常识

　　Itisafactthat…　事实是……

　　I