第1页共8页《英语周报》高考二轮复习——语法项目讲解与练习状语从句一、状语从句的类型及引导词状语从句根据其用途可分为时间状语从句、地点状语从句、原因状语从句、目的状语从句、结果状语从句、条件状语从句、让步状语从句、方式状语从句、比较状语从句九种。时间状语从句:由when,as,while,whenever,after,before,until/till,assoonas,since,once等连词,directly和immediately等词,bythetime,everytime,themoment,theminute等表示时间的短语以及nosooner...than或hardly...when引导。地点状语从句:由where,wherever,anywhere,everywhere等引导。原因状语从句:由because,since,as,nowthat,seeingthat,consideringthat,inthat等引导。目的状语从句:由so,sothat,incase,inorderthat,forfear(that)等引导。结果状语从句:由so(that),so...that,such...that,withtheresultthat等引导。条件状语从句:由if,unless,so/aslongas,onlyif,provided,onconditionthat,incase,suppose/supposing(that)等引导。让步状语从句:由although,though,evenif/though,as等连词,“疑问词+ever”构成的复合词,“nomatter+疑问词”或whether...or引导。方式状语从句:由as,like,asif/though,theway等引导。比较状语从句:主要由than或as引导。二、引导状语从句的常用连词注意事项1.when1)when引导时间状语从句时,从句的动作既可与主句的动作同时发生,也可先后发生。如:HerbertwashavinghisdinnerwhenIsawhim.Whenthelightswentout,Ilitsomecandles.2)when可以引导条件状语从句,意为“如果”。如:I’llgiveittoyouwhenyousay“please”.2.while1)while引导时间状语从句时,从句的谓语一般是延续性动词(如work,stay,wait,live等)。如:Pleasedon’ttalksoloudwhileothersareworking.2)while引导让步状语从句时,相当于although/though。while和although引导的让步状语从句不用倒装语序,though引导的让步状语从句可以倒装也可以不倒装。如:第2页共8页While/Although/Thoughthebrideishappy,shewillfeelhomesickatthebeginning.Happythoughthebrideis,shewillfeelhomesickatthebeginning.3.until和till1)until和till都表示“直到”,常可互换,但till一般不用于句首,也不用于强调句中。2)until/till从句与肯定的主句连用时,主句的谓语动词一般是延续性动词,表示主句的动作一直持续到until/till所表示的时间为止。如:Youmaystayhereuntiltherainstops.Mr.Bushremainedtheretillhisbrotherarrived.3)until/till从句与否定的主句连用时,主句的谓语动词是非延续性动词,表示“直到……才”,即主句的动作到until/till所表示的时间才开始。如:Davidwon’tgotobedtillhiswifereturns.Leodidn’tcomeuntilhehadgoneoverhislesson.4)notuntil引导的从句位于句首时,主句需部分倒装。如:NotuntilIbegantoworkdidIrealizehowmuchtimeIhadwasted.5)notuntil结构可用于强调句中。如:Itwasnotuntilshecametoseeusthatweknewhermotherwasillinbed.4.as1)as引导时间状语从句时,表示“当……时,随着”。如:Justasthetwomenwereleaving,amessagearrived.Theatmospheregetsthinnerandthinnerastheheightincreases.2)as引导原因状语从句时,一般放在句首,表示十分明显的原因或是已知的事实。如:Asitisraining,weshallnotgocamping.3)as引导让步状语从句时,通常用倒装结构。具体情况如下:a.“形容词+as+主语+系动词”或“副词+as+主语+实义动词”。如:Youngestasheisinourclass,hestudiesverywell.MuchasIlikeit,Iwon’tbuyit.b.名词+as+主语+系动词(句首的名词前多不带冠词)。如:Childasheis,heknowsalot.c.实义动词+as+主语+助动词/情态动词。如:FailasIdid,Iwouldnotabandonmygoal.Tryashemight,hecouldn’tlifttheheavybox.第3页共8页4)as引导方式状语从句时,意为“如,像,按照”。如:IdidasIwastold.5)as引导比较状语从句时,常用于as...as...和notso/as...as...结构中。如:Helencomestovisitmeasoftenasshecan.Hiseyesaren’tso/asblueastheylookinthefilm.5.noso...