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1、专题十五状语从句第一部分中考英语语法专题什么是状语从句？用一个句子充当状语成分，那个句子就是状语从句。Igetupatsixwhenitisdark.IgetupatschoolwhereIstudy.状语从句状语从句同副词，介词词组等作状语一样，用于修饰谓语，说明谓语动作的时间，地点，方式，手段，条件，程度，比较，原因，目的，结果等Igetupat6:00ItisdarkIgetupwhenitisdark1.时间状语从句IwaswatchingTVatteno'clockyesterday.Iw
2、aswatchingTVwhenmymothergothome.----------------------------↓时间状语----------------------------↓时间状语从句1.时间状语从句的引导词：when（当……时候）,while（当……时候）,before（在……之前）,after（在……之后）,till/until（直到）,assoonas（一……就……），as（当……时,一边……,一边……）,since（从……以来）,bythetime（当……时候）等引导。在忘记
3、之前,我要把它写下来。我一到上海就会写信给你。我们一直到雨停了才离开。Wedidn’tleaveuntiltherainstopped.AssoonasIarriveinShanghai,Iwillwritetoyou.I’llwriteitdownbeforeIforgetit.2.在时间状语从句里，当主句是一般将来时，从句用一般现在时。①I’llringyouupassoonasIgettoNewYork.Iwilltellhimeverythingwhenhecomesback.Hewon’t
4、believeituntilheseesitwithhisowneyes.when:当……时候,通常指某一特定的时间点，主句与从句的动作同时发生。WhenIopenedthewindow,Isawhimcomeup.WhenIhavetime,Iwillgotoseeyou.WhenIcamehome,Imetanoldschoolmateofmine.Hesaidhewouldtellheraboutitwhenhesawher.while:在……期间，往往指一段时间,从句中一般用持续性动词作谓语
5、。Shefellasleepwhileshewasreadingthenewspaper.while有时可以作并列连词，表示对比，可译成……而……。IamfondofEnglishwhilehelikesmaths.Iwasworkingwhilehewasplaying.as:当…时；一边…一边；随着……某事一发生，另一事立即发生＊两个动作同时发生Asthedaywenton,theweathergotworse.Asthecaptainpassedme,Iaskedhimwhetherthere
6、wasanyhopeofsavingtheship.____________he had finished his homework，he took a short rest．____________hewalkedalongthelake，hesanghappily.____________shewastypingtheletter,thetelephonerangwhen，as，while区别①when②while③asWhenAsWhile"时间点""延续性动词"“一边..........一边
7、”"时间段""终止性动词"assoonas---一……就……Jackwenttoschoolassoonashegotwell.I’llringyouupassoonasIgetananswerfromhim.since：自从…,通常主句用现在完成时IhaveneverbeenthereagainsinceIgraduatedfromtheuniversity.Itis+时间段+since从句(过去时)②Ithasbeen+时间段+since从句(过去时)Itisfiveyearssinceweme
8、tlasttime.Ithasbeentenmothssincewegraduated.※before①在……前ItwillbehalfayearbeforeIcomeback.Itwon’tbehalfayearbeforewemeetagain.Wesailedfourdaysandnightsbeforewesawtheland.②itwillbe+一段时间+before...多久之后才...③itwon’tbe+一段时间+before...不久就....※ti
