主语从句超全讲解加练习

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1、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作形式主语,而把从句放在后面。例如:1.Thathewillrefusethispieceofadviceisimpossible.2.Thattheyshouldlikeeachotheri

2、snatural.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.2)Itis+adj.+从句　It’scertainthat…肯定…　Itispossiblethat...很可能……　Itis

3、unlikelythat...不可能……Itisobviousthat…很明显…Itisnecessaryimportantatural...that…+(should)do________________(很可能)shewillcomebacktomorrow.*_________________(很明显)thismeasureiseffective.3)It+不及物动词+从句Ithappenedthat...碰巧……Itoccurredtomethat…我突然想起…_______________(刚好)Icameintotheof

4、ficeatthattime.*____________________(我突然想起)Iforgettosenttheletter.4)It+be+过去分词+从句Itissaidthat...据说……Itisknowntoallthat...众所周知……Itisreportedthat...据报道……Itisbelievedthat..人们相信……Itissuggestedthat+(should）do...建议……Itmustbeadmittedthat…必须承认……Itcannotbedeniedthat…不可否认……　　Itmustbe

5、pointedoutthat…需指出的是……　__________________(据报道)20peoplewerekilledintheaccident.*_______________(建议)weshouldeatmorevegetableanddomoreexercise.2.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一样引导从句，ever起到强调作用。它们在句子中担任主干成分，并用陈述句形式)Whatmanysc

6、ientistsbelieveisthattheearthisround…Whowilltakepartinthemeetinghasnotbeendecided.Whoeverbreaksthelawwillbepunished.Whateverwassaidheremustbekeptsecret.3)连接副词when，where，how，why等。Whytheysuddenlydisappearedstillremainsamystery.Whentheywillleaveisnotdecided.Howwewillpainttheho

7、usehasnotbeendecided.注意:1）主语从句在句首时，必须由连接词引导，不能省略这些连接词误：Theyshouldlikeeachotherisnatural.正：Thattheyshouldlikeeachotherisnatural2)whether引导主语从句，if不可误：IfMaryreallyheardhimisreallydoubtful.正:WhetherMaryreallyheardhimisreallydoubtful.Completethesentencesusingwhat,whether,where,w

8、hen，who,why,howorthat.1.(_____isneededforsuccess)isyourhardwork.2.2.(______theywil