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1、TheAdverbialClauseMainlyrevision用作状语的从句叫做状语从句。引导状语从句的关联词是一些从属连词。Whenyoucrosstheroad,youmustbecareful.当你过马路时要小心。（when是从属连词）IwaslatebecauseImissedthebus.我迟到了，因为我错过了公共汽车。（because是从属连词）Ifsheasksme,I’lltellher.她如果问我，我就告诉她。（if是从属连词）Youlookasifyouneedarest.你看起来好像是需要休息。（asif是从属连词）状语从句的种
2、类1、时间状语从句when,while,assoonas,since,until,before,after2、条件状语从句if3、原因状语从句because4、地点状语从句where5、结果状语从句so/such…that6、让步状语从句although,though7、比较状语从句than1.时间状语从句引导时间状语从句的关联词常有：after,before,when,while,assoonas,as,since,until等。e.g.我吃完午饭后就去上学。IwenttoschoolafterIhadmylunch.e.g.他睡觉之前要先刷牙。He
3、brushedhisteethbeforehewenttobed.e.g.等他回来吧。Waituntilhe comes back.e.g.他来时，我在做饭。Whenhecame,Iwascooking.e.g.我一回来就给你打电话。I’llcallyouassoonasIcomeback.e.g.他们回来前，我们已经完成工作了。Beforetheycameback,wehadfinishedthework.e.g.自从他离开后我们没见过面。Wehaven’tseeneachothersinceheleft.while/when辨析when/while
4、+doinge.g.When/whilereading,hefellasleep.when+短暂性/延续性动词；while+延续性动词e.g.当老师进来时，我正在睡觉。Whentheteachercamein,Iwassleeping.=While/WhenIwassleeping,theteachercamein.when(就在这时)e.g.我正在睡觉，就在这时有人敲门了。Iwassleeping,whensomeoneknockedatthedoor.while的其他含义：WhileIwaswalkingdownthestreet,Icameacr
5、ossanoldfriend.(while=_______)Helikespopmusic,whileIamfondoffolkmusic.(while=_______)WhileIreallydon’tlikeart,Ifindhisworkimpressive.(while=_________)Whilethereislifethereishope.(while=___________)whenalthoughaslongasbut只要有生命在，就有希望。（一息若存，希望不灭）★as的常见用法：1.Shesangassheworked.一边……一边
6、……2.YoumusttrytodoasIdid.像…..一样3.Asshewaslateforclass,shehadtosaysorry.由于※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“某动作一直延续到某时间点才停止”。如：我们一直等到他来。Wewaiteduntil/tillhecame.2．not…until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：直到她回
7、来我才开始看电视。IdidnotwatchTVuntilshecameback.3．till不可以置于句首，而until可以。如：UntilyoutoldmeIhadnoideaofit.Dosomeexercise.1. ______hecomesheretomorrow,Iwillcallyou.2. ____________hewaswalkinginthestreet,hemetTim.3. Shesang____shecooked.4. Therewasanapplause___________sheappearedonthestage.5.
8、Itwon’tbelong______hefinisheshiswriting.WhenWhi
