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《人教版英语必修三主语从句ppt课件.ppt》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、GrammarGrammar主语从句主语从句:做主语用的名词性从句,因其在复合句中做主语,又称主语从句,引导主语从句的有连词that,whether,连接代词who,what,which,连接副词when,where,how,why等。1)从属连词:that,whether等.that引导主语从句只起引导作用,本身无实际意义,在主语从句中不充当任何成分,但不能省略。Thathewillwiniscertain.他肯定会赢。Whetherhe’llcomehereisn’tclear.他是否会来这里还不清楚。注意:由that引导的主语从句有时为了使句子结构平衡,避免“头重脚轻”,常用it作形
2、式主语,而把从句放在后面。例如:1.Thathewillrefusethispieceofadviceisimpossible.______________________________________________________________________________2.Thattheyshouldlikeeachotherisnatural._____________________________________*it为形式主语Itisnaturalthattheyshouldlikeeachother.Itisimpossiblethathewillrefusethi
3、spieceofadvice.这样就构成了下面一些常用句型:1)Itis+n.+从句Itisapity/shamethat...遗憾的是……Itisasurprisethat…令人惊奇的是…Itisafactthat……是事实Itiscommonknowledgethat……是常识*_______________(很遗憾)welostthematch.*______________(这是事实)hecheatedintheexam.ItisapitythatItisafactthat2)Itis+adj.+从句It’scertainthat…肯定…Itispossiblethat...很可能
4、……Itisunlikelythat...不可能……Itisobviousthat…很明显…Itisnecessaryimportantatural...that…*_________________(很可能)shewillcomebacktomorrow.*_________________(很明显)thismeasureiseffective.+(should)+do…ItispossiblethatItisobviousthat3)It+不及物动词+从句Ithappenedthat...碰巧……Itoccurredtomethat…我突然想起…*_______________
5、_(刚好)Icameintotheofficeatthattime.*____________________(我突然想起)Iforgettosenttheletter.IthappenedthatItoccurredtomethat4)It+be+过去分词+从句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……Itca
6、nnotbedeniedthat…不可否认……Itmustbepointedoutthat…需指出的是……*___________________(据报道)20peoplewerekilledintheaccident.*______________________(建议)weshouldeatmorevegetableanddomoreexercise.ItisreportedthatItissuggestedthat2.连接代词who,what,which,whatever,whichever,whoever(Who,whom,which,what可以和ever构成合成词,和what一
7、样引导从句,ever起到强调作用。此类主语从句不能用形式主语it引导,它们在句子中担任成分,不能省略,语序为陈述语序)Whatmanyscientistsbelieveisthattheearthisround…Whowilltakepartinthemeetinghasnotbeendecided.Whoeverbreaksthelawwillbepunished.Whichstudentwillwinisuncert
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