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1、状语从句状语从句的种类1、时间状语从句when,while,assoonas,since,until,before,after2、条件状语从句if3、结果状语从句so…that4、比较状语从句than5、原因状语从句because6、让步状语从句although,though7、地点状语从句where1.时间状语从句引导时间状语从句的关联词常有：after,before,when,while,whenever,assoonas,as,since,until等。例：Theballgoesupveryhighafterithitstheground.
2、这球着地后蹦得很高。Waituntilyou’recalled.你等着叫你吧！(1)when引导的从句：表示“当…时候”表点时间正在进行的动作Iwasgoingoutwhenavisitorcame.(动作同时发生）1.when,while2.while引导的从句：表段时间正在进行的动作e.g.WhilewewerewatchingTV,Mr.Liisreadingintheoffice.while/when辨析be+doing+when/while正要做，正在做…这时Whentheteachercamein,Iwassleeping.=Whil
3、e/WhenIwassleeping,theteachercamein.when(就在这时)Iwassleeping,whensomeoneknockedatthedoor.※while的其他含义：WhileIwaswalkingdownthestreet,Icameacrossanoldfriend.(while=_______)Helikespopmusic,whileIamfondoffolkmusic.(while=_______)WhileIreallydon’tlikeart,Ifindhisworkimpressive.(while
4、=_________Whilethereislifethereishope.(while=_______________)When当Although尽管aslongas只要But但是※as:当…时；一边…一边；随着……Asthedaywenton,theweathergotworse.★as的常见用法：1.Shesangassheworked.一边……一边……2.YoumusttrytodoasIdid.像…..一样3.Asshewaslateforclass,shehadtosaysorry.由于※before①在……前Itwillbehalf
5、ayearbeforeIcomeback.Itwon’tbehalfayearbeforewemeetagain.Wesailedfourdaysandnightsbeforewesawtheland.Wehadn’trunamilebeforehefelttired.④肯定句“才”否定句“就”②itwillbe+一段时间before......多久之后才...③itwon’tbe+一段时间before......不久就....1.Mysister_____________(read)herbookintheclassroomwhenhertea
6、chercamein.wasreading2.I__________(do)homeworkwhilemyparents_______________(watch)TVlastnight.wasdoingwerewatching3.IwillnotwatchTV_______(after/before)Ifinishmyhomework.before※till,until和not…until：1.until/till引导时间状语从句用于肯定句时，主句的动词是延续性动词，表示动作或状态一直持续到until/till所表示的时间，意为“某动作一直延续
7、到某时间点才停止”。如：Wewaiteduntilhecame.2．用于否定句时，主句谓语动词是非延续性动词，从句为肯定，意为“某动作直到某时间才开始”。如Hewon’tgotobedtill/untilshereturns.3．till不可以置于句首，而until可以。如：UntilyoutoldmeIhadnoideaofit.练一练1.______hecomesheretomorrow,Iwillcallyou.2. ________hewaswalkinginthestreet,hemetTim.3.Shesang____sheworke
8、d.4.Therewasanapplause___________sheappearedonthestage.WhenWhile/Whe
