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1、9种状语从句--中考重点和难点状语从句可分为九类:1.时间状语从句:when,while,as,before,after,assoonas,until/till,since.2.条件状语从句:if,unless.3.原因状语从句:because(so),since,as,for.4.目的状语从句:sothat=inorderthat5.结果状语从句:so….that…,such….that…6.比较状语从句as...as,notas…as,than…7.让步状语从句though,although,eventhough,e
2、venif.8.方式状语从句:as….9.地点状语从句:where,wherever.状语从句可置主句之前,也可置主句之后。前置时,从句后用逗号与主句分开;后置时,与主句之间无标点符号。e.g.Ifyougototheparty,youwillhaveagoodtime.Youwillhaveagoodtimeifyougototheparty.1.时间状语从句(1)引导词:when,while,as,before,after,assoonas,until/till,since.e.g.Motherwascookingdi
3、nnerwhenIreachedhome.(when“当……的时候)e.g.Whilethegirlwasshopping,theUFOlanded.(While“当……的时候)e.g.Ashewasreading,hewaslisteningtotheradio.(As“一边……一边”)e.g.Don’tclosethewindowbeforeyougotobed.(before在……之前)e.g.AfterIhaddonemyhomework,Iwenttobed.e.g.TheGreenshavelivedheres
4、incetheycametoChina.(since引导的时间壮语从句若用一般过去时,主句则用现在完成时)e.g.IwilltellyouassoonashegetstoBeijing.(assoonas一…就)e.g.Iwilltellhimwhenhecomesback.e.g.Iwon’tgotobeduntilIfinishmyhomework.时间壮语从句中主句若用一般将来时,从句则用一般现在时表示将来。(2)not...until的同义句替换。①not…until表示“直到……才”,until可用before替
5、换e.g.Ididn’tleaveuntil/beforeshecameback.(leave是个短暂性动词)②until在肯定句中表示“直到为止”主句中动词用延续性动词e.g.Iwaiteduntilhearrived.(wait是一个延续性动词)practice:1.IwillgotobedassoonasI____myhomework.A.willfinishB.finishingC.finishC2.IwillnotwatchTVuntilIfinishmyhomework.=IwillnotwatchTV____
6、_IfinishMyhomework.before3.Mysister___________(read)herbookintheclassroomwhenherteacher_______(come)in.wasreading4.I__________(do)myhomeworkwhilemyparents____________(watch)TVlastnight.wasdoingwerewatchingcame2.条件状语从句(1)引导词:if,unless.unless是从属连词,它引导条件壮语从句,译作“除非……否
7、则的话”ife.g.IfIamfree,Iwillcallyou.e.g.Ifitdoesn’train,wewillgoforawalk.unlesse.g.Youwillbelateforclassunlessyoustartrightnow.除非你现在出发否则的话年上学就会迟到的。e.g.Youwillnotsucceedunlessyouworkhard.(2)主句若为一般将来时,从句用一般现在时(3)if...not与unless(=if…not…)及or(不然,否则)的同义句转换。e.g.Hurryup,ory
8、ouwillbelate.=Ifyoudon’thurryup,youwillbelate.=Unlessyouhurryup,youwillbelate.eg.Studyharder,oryouwillfailtheexam.=Ifyoudon’tstudyharder,youwillfailthee