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专题十五状语从句第一部分中考英语语法专题用一个句子充当状语成分，那个句子就是状语从句。•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1.Igetupat6:002.Itisdark3.Igetupwhenitisdark1.时间状语从句IwaswatchingTVatteno'clockyesterday.IwaswatchingTVwhenmymothergothome.----------------------------↓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’tbelieveituntilheseesitwithhisowneyes.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。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,Iaskedhimwhethertherewasanyhopeofsavingtheship.____________hehadfinishedhishomework，hetookashortrest．____________hewalkedalongthelake，hesanghappily.____________shewastypingtheletter,thetelephonerangwhen，as，while区别①when②while③asWhenAsWhile时间点延续性动词“一边..........一边”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)Itisfiveyearssincewemetlasttime.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....※till,until和not…until：1.until/till引导时间状语从句用于肯定句时，主句的动词是延续性动词，表示动作或状态一直持续到until/till所表示的时间，意为“某动作一直延续到某时间点才停止”。如：Wewaiteduntilhecame.2．用于否定句时，主句谓语动词是非延续性动词，从句为肯定，意为“某动作直到某时间才开始”,如:Hewon’tgotobedtill/untilshereturns.练习:1.I’llwritetoyou_______Igetthere.A.whileB.beforeC.assoonasD.by2.Hehaslivedinthecity_________hecamebackfromAmerica.A.whenB.beforeC.sinceD.after3.Wewon’tleavehere_______ourteachercomesback.A.untilB.sinceC.afterD.assoonas4.Ihadtofinishthepicture________mymothercameback.A.untilB.beforeC.afterD.while5.Johnfellasleep________hewaslisteningtothemusic.A.afterB.beforeC.whileD.assoonas中考题型时间状语从句2.地点状语从句地点状语从句由where,wherever等引导。例如：•Youcantakeawalkwhereveryouliketo.•---Mom,whatdidyourdoctorsay?---Headvisedmetolivewheretheairisfresher.3.条件状语从句由if（如果）,unless（if...not，除非）,so/aslongas（只要）等引导，谈论的是一个有可能发生的事实及其产生的相关的结果，主句用现在时，从句也用现在时；主句用过去时，从句也用过去的某种时态。主将从现具体地讲，主句是一般将来时(包括祈使句和含有情态动词can,may,must等)，从句也用一般现在时。①Wewon’twaitforhim,ifhedoesn’tcomebefore12o’clock.Wewon’twaitforhim,unlesshecomesbefore12o’clock.Solongasyoukeepontrying,youwillsurelysucceed.“祈使句+and（or）+结果句”③=条件状语从句Hurryup,oryou'llbelate.=Ifyoudon'thurryup,you'llbelate.Studyhardandyouwillpasstheexam.=Ifyoustudyhard,youwillpasstheexam.You’llbelate______youdon’tgetupearlytomorrowmorning.A.ifB.whenC.beforeD.untilIfhe______ontime,wewillgowithouthimA.doesn’tcomeB.don’tcomeC.didn’tcomeIfyou_______himtomorrow,pleaseaskhimifhe______toworkonthefarmwithus.A.see;goesB.willsee;goesC.willsee;willgoD.see;willgo中考题型总结：条件状语从句考的频率比较高，主要考查if连词和if引导的从句与主句的时态（主将从现）条件状语从句如果是否4.原因状语从句原因状语从句通常由because,as,since,等词引导。because语气较强，用以回答why问句。④－Whyareyoulateagaintoday?－BecauseI'vegotabadcold.as语气较弱，较口语化，所表示的原因较明显。AsIdidn’tknowtheway,Iaskedapoliceman.since语气较弱，常表对方已知的事实，相当于汉语的“既然”。Sinceyoucan'tanswerthequestion,youmightasksomeoneelseforhelp.because和so不能同用在一个句子里⑤,如：我们不能说：Becauseitrainedhard,sowestayedathome.应该说：或Itrainedhard,sowestayedathome.Becauseitrainedhard,westayedathome.becauseof和because的区别⑥①becauseof后加名词代词或动名词，不加句子，而because加句子，例：•Becauseofhisillness,hedidn’tgotowork.•Becausehewasill,hedidn’tgotowork.1.Ididn’tbuythedictionaryyesterday______myauntwouldgivemeone.A.untilB.becauseC.ifDbefore2.----Whydidyoucometoschoollatethismorning?-----______IwatchedthefootballWorldCupuntil12o’clocklastnight.A.IfB.BecauseC.SinceD.Though中考题型√√总结：重点掌握because的用法（注：because和so不能同时用在一个句子中）原因状语从句5.结果状语从句•结果状语从句常用sothat,suchthat等关联词引导。e.g.•Heissoyoungthathecan’tgotowork.•Hegotsolittlepaythathisfamilyhadtoliveonwelfaremoney.•It’ssuchagoodchancethatwemustn’tmissit.他如此小以致于他不能上班。他工资很少，他的家人不得不靠救济金生活。(welfaremoney)机会这样好，我们决不能失掉。so…that…和such…that…⑦such…that“如此的…以致于”表结果。该结构常见于：1.such＋a(an)＋形＋名词＋that2.such＋形＋复数名词／不可数名词＋thatso…that“如此的…以致于”表结果。该结构常见于：1.so+形／副＋that2.so+形＋a(an)＋单数名词＋that3.so＋many/much/few/little＋复数名词（不可数名词）+thatItwassuchawonderfulfilmthatallofuswantedtoseeitagain.=Thefilmwassowonderfulthatallofuswantedtoseeitagain.•Itissuchanimportantmatchthatnobodywantstomissit.•=Thematchissoimportantthatnobodywantstomissit.•Hehadsuchlongarmsthathecouldalmosttouchtheceiling.•Soonthereweresomanydeerthattheyateupallthewildroses.