状语从句的省略

巧记状语从句的省略时，条，让，方，地，主语同，谓语be，二者省去不可惜，从句主语是it，省去it’s也可以。状语从句的省略问题1.在状语从句中，如果主语与主句的主语一致，同时从句中又含有系动词be，则通常可以省去从句的主语和系动词be，留下其他部分。When(youare)introuble,youcanvisitthisman.当你有麻烦时，你可以找这个人。When(hewas)ayoungman,hewasfondofhunting.他年轻时，喜欢打猎。WhileinBeijing,IpaidavisittotheSummarPalace.在北京时，我参观了颐和园。Shealwayssingswhiledoingherwork.她干活时总是唱歌。Hewasaswimmerwhenachild.他小时候就是一名游泳运动员。Heoftenmakesmistakeswhensingingsongs.唱歌时他常出错。Onceseen,itcanneverbeforgotten.一旦看见，永远也不会忘记。状语从句的省略问题2.若状语从句中的主语是it，动词是系动词be，则通常可省去主语it及系动词be,留下其余部分。I’llbuyacomputerif(itis)necessary.如有必要，我就买一台电视机。Nomatterhowdifficult(itmaybe),wearedeterminedtocarrytheresearchtotheend.不管有多困难，我们决心把研究进行到底。Exercises1.Don’tleaveuntil____todoso.A.beorderedB.orderingC.orderD.ordered2.Abeamoflightwillnotbendroundunless___todosowiththehelpofareflectingdevice.A.havingbeenmadeB.beingmadeC.madeD.youmadeDcEveryeveningafterdinner,ifnot---fromwork,Iwillspendsometimewalkingmydog.A.beingtiredB.tiringC.tiredD.tobetired-Whoshouldberesponsiblefortheaccident?-Theboss,nottheworkers.Theyjustcarriedouttheorder----A.astoldB.asaretoldC.astellingD.astheytoldCA