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1、大飞扬123321状语从句状语从句按其意义和作用可分为:1.时间状语从句2.地点状语从句3.原因状语从句4.目的状语从句5.结果状语从句6.条件状语从句7.方式状语从句8.比较状语从句9.让步状语从句1、时间状语从句引导时间状语从句的从属连词有:when,while,as,whenever,before,after,since,till,until,assoonas,once,hardly…when,nosooner…than等引导。如:Whenhewasstillayoungman,hewasforcedt
2、oleavehishomelandforpoliticalreasons.Ithasbeen15yearssinceheleft.I’lltellhimthenewsassoonasIseehim.Onceyouhavegotusedtoit,youwilllikeit.Iwaitedtillhehadfinishedhiswork.注意:(1)when,as,whilewhen即可引导持续性动作,又可引导短暂性动作。它可以表示主句的动作和从句的动作同时发生,或从句的动作发生在主句动作之前。如:as引导持续性
3、动作,侧重主句和从句的动作同时发生。Hehurriedhome,lookingbehindashewent.Isawyoursisterasshewasgettingonthebusyesterday.Hesangashewalked.as引导持续性动作,侧重主句和从句的动作同时发生。Hehurriedhome,lookingbehindashewent.Isawyoursisterasshewasgettingonthebusyesterday.Hesangashewalked.as也可表示“随着”,但要注
4、意与with的区别:Asthedaywenton,theweathergotevencold.(从句,故用谓语动词)Withthedaygoingon,theweathergotevencold.(介词,故用非谓语)While:指的是“在某一时间里”,“在……期间”,从句里的动作必须是持续性的,它也强调主句和从句动作的同时发生,往往侧重主句和从句动作的对比。如:WhilehewasinLondon,hestudiedmusic.WhilewewerewatchingTV,hewaswritingacompos
5、ition.while也可做并列连词,表示对照的含义,意思为“然而”。如:Heistallwhilehisbrotherisshort.当when,as,while表示“在…一段时间里”,主从句的动作同时发生时,可以换用。如:While(When或As)wewerediscussing,Mr.Smithcamein.(2)如果when和before引导的从句位于主句之后,有时不能译成“当…时候”和“在…之前”,而要译成“就”、“才”、“这时”等。如:Thestrugglelastedfouryearsbefo
6、retheNorthwonintheend.Healmostknockedmedownbeforehesawme.Shehadnotbeenmarriedmanyweekswhenthemansawherandwasstruckbyherbeauty.IwaswalkinginthestreetwhenIsawhim.before的句型:Itwon’tbelongbeforesb.doessth.不用多久某人就会……Itwillbelongbeforesb.does要过很久某人才会……Itwaslongbef
7、oresb.didsth.过很久某人才做……Itwillbe+一段时间+beforesb.does某人要过多长时间才做Itwas+一段时间+beforesb.didsth.某人过了多长时间才做(3)bythetime,eachtime,everytime,immediately,themoment,theinstant,theminute,soonafter,shortlyafter都可以作为连词,引导时间状语。如:Bythetimehewasfourteen,hehadtaughthimselfadvanc
8、edmathematics.bythetime+现在时,主句用将来完成时.例如:Bythetimehearrives,wewillalreadyhaveleftCalifornia.bythetime+一般过去时,主句用过去完成时.例如:Bythetimehearrived,wehadalreadyleftCalifornia.注意bythetime的用法Eachtimehecame,hewould