状语从句省略.ppt

状语从句的省略在时间、条件、让步、地点以及方式状语从句中，如果主句和从句的主语一致,或者从句主语为形式主语it且谓语包含系动词be的某种形式，那么可以将从句的主语及动词be省略，从而使语言更加简洁、明了。一、时间状语从句中的省略When(shewas)veryyoung,shebegantolearntoplaythepiano.While(Iwas)atcollege,Ibegantoknowhim.Don’tcomeinuntil(youare)askedto.Whenever(itis)possible,youshouldcomeandhelp.Youshouldletusknowtheresultassoonas(itis)possible.When(itis)takenaccordingtothedirections，thedrughasnosideeffects.As(hewas)ayoungboy,hedidallhecouldtohelphisfatheronthefarm.二、地点状语从句中的省略常用下列结构：where(ver)possible/necessary,Youcanaskmequestionswhereverpossible.Fillintheblankswitharticleswhere(itis)necessary.三、让步状语从句中的省略Heisagoodman,thoughsometimes(heis)ratherdull.他真是个好人，尽管有时有点无聊。Evenif(Iam)invitedto,Iwon’tgotosuchabadlecture.Although(shewas)notyetninemonthsold，shewasabletowalkwithoutsupport四、条件状语从句中的省略Sendthegoodsnowif(theyare)ready.Hewillcomeif(heis)asked.If(itis)necessary,ringmeathome.Comealongwithmeif(itis)possible.If(itis)true,itwillcasueusalotoftrouble.Youshouldstaywhereyouare,unless(youare)askedtoleave.另外：Heissmartanddiligentaswell.Ifso,hemustpassthecollegeentranceexamination.Ifnot,hewillfailtopassit.五、比较状语从句中的省略Shehasfinishedtheworkearlierthan(ithasbeen)expected.她这项工作比预料的提前完成。Thenumberofthepeoplepresentattheconcertismuchsmallerthanexpected.Thereweremanyticketsleft.六、方式状语从句中的省略Fillintheblanksas(youare)asked.Heactsasif(hewere)afool.Shetalkedtothestrangerasthough(shewere)absent-minded.她和陌生人谈话似乎很不在意。Heopenedthedeskasif(hewas)insearchofsomethingimportant.Theboyisrunningimpatientlyhereandthereasif(heis)searchingforsomethinglostonthesportsground.Thefootballplayerisrollingonthegroundasif(heis)badlyhurtintheleg.Hemovedhislipsasif(hewanted)tospeak.巩固练习：1.Theboywillmakealotoftroublewhen_____alone.A.leavingB.leaveC.leftD.beingleft2.Trytoexplainthisnewtheoryandgiveactualexamples_____.A.ifitneededB.whennecessaryC.wheretheyarepossibleD.whenyouarepossible3.If___，theexperimentwillbesuccessful.A.docarefullyB.didcarefullyC.carefullydoneD.doingcarefully4._____inthedark，hehitagainstatree.A.WhenwalkingB.Whenhe