条件状语从句课件

定义：在复合句中由从句表示的状语称作状语从句，它可以用来修饰谓语（包括非谓语动词）、定语或状语，或是整个句子。准确掌握每一个连词的含义是掌握状语从句的关键。同时要注意主从句的时态呼应。状语从句一般分为九大类状语从句类别:时间状语从句地点状语从句原因状语从句目的状语从句结果状语从句条件状语从句方式状语从句比较状语从句让步状语从句1.时间状语从句：引导时间状语从句的连词有：when,while,as,themoment,before,after,till,until,since,assoonas等。请注意when,while,as的区别When---当……时候,通常指某一特定的时间点，主句与从句的动作同时发生。WhenIopenedthewindow,Isawhimcomeup.WhenIhavetime,Iwillgotoseeyou.WhenIcamehome,Imetanoldschoolmateofmine.Hesaidhewouldtellheraboutitwhenhesawher.*注意：在时间状语从句中，主从句都是将来的动作或状态时，习惯上主句用将来时，从句用一般现在时。When---正在……的时候，突然…。通常主句是进行时或beaboutto时，在翻译的时候，when可以译成没想到或突然。Iwaswalkingalongthestreet,whenImethim.Iwasabouttofallasleepwhenmysistercamein.Oneevening,littleHanswassittingnearthefirewhenheheardaloudknockatthedoor.When当从句是进行时，主句是一般时，往往表示不满。SomeoneknockedatthedoorwhenIwashavingbreakfast.WhenIwasleavingthehouse,thepostmanarrived.Whenthechildrenhadgonetobed,shebegantoprepareherlessons.When=afterWhile---在……期间，往往指一段时间。WhilewewereinAmerica,wesawhimtwice.Whileweweretalking,hecamein.Strikewhiletheironishot.While---表示一种不满情绪，意思是这边在干某种重要的事，而另一边在享受等。Wearecleaningtheclassroomwhiletheyareplayingthefootball.Thesoldierfacesthepowderwhilethebeautypowdertheface.WhileIamwashingthefloor,youcanbecleaningthewindows.As---一边……一边,随着Shewasdoingherhomeworkasshewaslisteningtothemusic.Asshegrewolder,shebecamemorebeautiful.As---当……时，指一个动作紧接着一个动作发生，从句通常用进行时。AsIwasgoingout,itbegantorain.IsawMaryasshewasgoingonthebus.Ashewaseatinghisbreakfast,heheardsomeoneknockatthedoor.SomeonepattedmeontheshoulderasIwasstandingbeforetheshopwindow.Themoment---一……就……=assoonas,immediately,---DidyouremembertogiveMarythemoneyyouowedher?---Yes,IgaveherthemomentIsawher.Not…until---直到……才Hedidn’tleavetheofficeuntilhefinishedthework.=Helefttheofficewhenhefinishedthework.Not…until可以和when互换Before---在……之前Thepassengersshouldarriveattheairportanhourbeforetheflightdeparts.Didyouworkasastewardessbeforeyoucometothiscompany?ItwasnotlongbeforeIforgotitall.(Itwas/willbe…before…是常用句型)HeranoffbeforeIcouldstophim.After---在……之后Thecustomerlefttheticketcounterafterhehadaquarrelwiththeticketagent.Theplanetookoffaftertheairtrafficcontrollergaveclearance.Since---自从……,通常主句用现在完成时IhaveneverbeenthereagainsinceIgraduatedfromtheuniversity.Thecaptainhastraveledalmosteverywhereintheworldsincehebecameapilot.Itisjustaweeksincewearrivedhere.(Itis/hasbeen…since…是常用句型）Assoonas---一……就……Jackwenttoschoolassoonashegotwell.I’llringyouupassoonasIgetananswerfromhim.Nosoonerthan---一……就……Nosoonerhadhearrivedthanhewentawayagain.nosooner…than…用于句首要求倒装Hardly…when…Scarcely…when…Onceyouseehim,youwillneverforgethim.Once---一但……就……Everytime,eachtime每次whenever每当Eachtimehecametotown,hewouldvisitourschool.Wheneverwemetwithdifficulties,theycametohelpus.2.条件状语从句引导状语从句的连接词有:If,unless,aslongas,incase,providedthat,onconditionthatIf---如果Ifyoudon’thurryup,youwillmisstheplane.Ifitsnowstomorrow,theflightwillbecanceled.Ifyouleaveat6o’clocktomorrowmorning,you’dbettergettobednow.Unless---如果不,除非=ifnotWecan’tgetthereontimeunlesswebooktheearliestflight=Wecannotgetthereontimeifwedon’tbooktheearliestflight.Don’ttroubletroubleunlesstroubletroublesyou.Hewillnotjoinusunlesshechangeshismind.Aslongas---只要Wewillsucceedaslongaswekeepontrying.Youcan’tplaygamesaslongasyouremembertherules.Amanisnotoldaslongasheisseekingsomething.As(so)faras---据……所知AsfarasIknow,hespeaksEnglishverywell.As/SofarasIknow,heisanexpertonDNA.Incase---假使,如果Theplanecannottakeoffincaseitrains.Sendusamessageincaseyouhaveanydifficulty.Providedthat如果,有时省略thatTheplanewillbeingoodconditionprovidedthatitistakencareofcarefully.Youcanbecomeastewardessprovidedthatyouareingoodshapeandyouhavegotthepropereducation.Onconditionthat---条件是…Hesaidthathewouldcometothemeetingonconditionthatnooneaskedhimtospeak.ThemotherpromisedtothesontobuyhimatoyairplaneonconditionthathepasseshisEnglishtest.注:主从句的动作发生在将来时，则主句用将来时,从句用一般现在时。Ifhearrivestomorrow,Iwillbewaitingforhimattheairport.Hesaidhewouldnotleaveunlessitwasfinenextday.3.地点状语从句地点状语从句只有两个连词:Where,whereverWhere---在……地方Putthemedicinewhereyoucaneasilygetit.Wherethathighbuildingstands,thereusedtobesomelow,desertedhouses.Wherethereisawill,thereisaway.Wherever---无论哪里Hefollowsherwherevershegoes.Whereveryouare,Iwillberighttherewaitingforyou.4.原因状语从句because,as,since,nowthat,和consideringthat,seeingthat这六个连词都用于表示表示原因,但在语气上一个比一个弱.Because---因为,通常从句放在主句后.MrSmithwasveryupsetbecausehecouldn’tfindhisluggage.Hesaidthathecouldn’tworkbecausethecomputerwasoutoforder.IsucceedbecauseIwilledit,Ineverhesitated.IdoitbecauseIlikeit.As---因为,通常放在句首Asitisquitewindytoday,hedecidesAsheishonestandmodest,allhisfriendslikehim.Since---既然因语气较弱,常译为既然Sinceeverybodyhascome,wecansetoff.Sincethepurserdidn’ttelluswhattodo,wecanrelax.Nowthat---既然Nowthatyouarehere,youcanjoinus.Nowthatallairlinesofferdiscountprices,weshoulddothesame.consideringthat---顾及到Consideringthattheyarejustbeginners,theyaredoingquiteagoodjob.seeingthat---由于Seeing(that)quiteafewpeoplewereabsent,wedecidedtoputthemeetingoff.5.结果状语从句引导结果状语从句的连词有：that,sothat,so…that…such…thatSo…that---太……以至于so后面应用形容词或副词,有时省略so只用thatBoeing747issola