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1、状语从句一个____在复合句中用作状语时,在语法上叫状语从句。从句由_____或________引导。分类：状语从句可表示1)________2)_________3)_________4)_________5)_________6)_________7)_________8)_________9)_________等句子概念时间地点原因目的结果条件行为方式比较让步名词词组连词一.引导时间状语从句1.when,while,as,before,after,until,till,since,eversince,once,assoonas，2.everytime
2、,next/last/eachtime,thefirsttime,themoment,theminute,theinstant3.hardly…when,nosooner…than,scarcely…when其中when,till,until,before,after,assoonas,themoment等引导时，如果主句的时态是一般将来时，则从句的时态用一般现在时。when,while,as_______________weweretalking,MrSmithscamein._____theycamehome,Iwascookingdinner.Iwa
3、sabouttogotobed_______Iheardsomeoneknockatthedoor.4.________wewerewatchingTV,hewasstudying.5.Heisfat_______hisbrotheristhin.6.______shesang,tearsrandownherface.Conclusion:A:从句为”当……的时候”,从句谓语为延续性动词,主句谓语为非延续性动词(即终止性动词),三者可通用.B当从句的谓语动词为终止性动词,只能用when;表示”正在那时”,也只能用when.C.从句和主句的谓语动词都为延续性
4、动词时,只能用while;while还可作并列连词,表示”而”.D.当强调主句和从句的动作同时发生时,只能用as,译为”一边……一边……;随着……”While/As/WhenWhenwhenWhilewhileAsbefore,after,sinceHehadleftthetowntheday______shearrived.Itwasnotlong_____helefthishometown.Iplayedfootball_____I(had)finishedmyhomeworkPleasetellherI’llcome_______Idosomesho
5、pping.Itwillnotbelong_____wemeateachotheragain.I__________(be)athisbedsidesincehe_______(become)ill.It_________(be)twoyearssincewe_______(begin)tousethismachine.beforeafterConclusion:1.before引导的从句是过去式,主句是过去时或过去完成时;.主句为过去时,after从句可用一般过去时代替过去完成时.since从句用过去时态,主句一般用现在完成时.Itis/hasbeen+
6、一段时间+since从句“自从…已经…”Itwas/won’tbe+一段时间+before从句“过了…才...”beforebeforeafterhavebeenbecameis/hasbeenbegantill与until:1.Helivedwithhisparents________hegraduatedfromcollege.2.Not____hetoldmedidIknowthetruth.3.Thechildren___________(willcome)homeuntil/tillit’sdark.4.Itwas_________thewarw
7、asoverthathereturnedtohisland.till/untiluntilwon’tcomenotuntilConclusion:1.位于句首时.只能用until,不用till.2.not…until可改写为:Itis/wasnotuntil…that强调句.3.notuntil放在句首，主句谓语要部分倒装。一…就…ill._______________________hesawthemonster,heturnedpale.Thespyhad_________returnedhomethanhewastoldtogotoanotherco
8、untry.Wehad____________returnedho
