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1.Helovesthesoundsoftherushingwaterandtheblowingwind_______,tohim,thebestmusiccomesfromnature.2._____hehadnomusicalinstrumentsthen,hemademusicwithcommonobjectslikestonesandpaper.3.___helikesthesoundsofnature,Tanusesthemalotinhismusic.goReady?becauseSinceAs•Ilikehimbecausehismusicmakesmefeelrelaxed.•IlikeTanDun’smusicbecauseheusesthesoundsofnaturealot.•IlikeWaterbestbecauseitisveryspecial.回答becausewhy引导的疑问句.使用because来引导原因状语从句.GrammarA:Whendoweuse“because”togivereasons?Lookandanswer:A:Whyareyouwearingaraincoat?B:Becauseit’sgoingtorain.A:WhydoesMikegoout?B:Becausehewantstoplaybasketball.A:Whydoestheboyeatthecake?B:Becauseheishungry.Ithink.A:Whydotheyturnonthefan?B:Becauseitistoohot.______herdaughterhadn’tcomeback,_____shelookedworried.A.Because;/B.Because;soB.B.C.Though;butD.Thought;/√because引导原因状语从句不能和so连用.DanielhasmorequestionsaboutTanDun.HesearchedtheInternetandmadesomenotes.Lookathisnotesandanswerhisquestions.Usebecausetointroducethereasons.1.WhywasTanDunchosentowritemusicfortheBeijingOlympics?_______________________________2.WhydoesTanlikethesoundsofnature?______________________________________________________________Becauseheisaworld-famouscomposer.Becausehethinksthebestmusiccomesfromnature.3.WhyisTanabletobuildabridgebetweentheEastandtheWest?______________________________________________________________4.WhydopeoplethinkhighlyofTan’smusic?______________________________________________________________BecausehehassuccessfullybroughtChineseandWesternmusictogether.Becausehehascreatedanewtypeofmusic—musicwithoutboundaries.B.Givingreasonswithsinceandas1.Sinceeveryoneishere,let'sstart2.Sinceso,Ihavenothingtosay.3.Sinceyouarewrong,youshouldsaysorry.1.since侧重主句，意思是“既然；由于；因为”，表示已知的、显然的理由since比as语气稍强，且比as略微正式，它们引导的从句通常放在主句之前，有时也放在主句之后。不表示直接原因。Since可用于省略句，而其他连词不行。（见例2）•and用来表示原因.•但所表的原因是大家已经知道的.•他们的语气比because要弱。WorkingouttherulesSinceas2.as鉴于主从并重，从句说原因，主句说结果。1.Asitislate,Imustgo.2.Asyouwerenotthere,Ileftamessage.as和since的用法大体相同，表示附带说明的“双方已知的原因”或者理由不是很重要，但语气更弱，没有since正式，常译为“由于，于”。例如：Asitisraining,you’dbettertakeataxi.既然在下雨，你最好乘出租汽车。Asyouaretired,youhadbetterrest.既然累了，你最好休息一下。和，与…一样Jackisastallashisfather.杰克和他的父亲一样高。Mypenisthesameasyours.我的钢笔与你的一样。作为Asawriter，hewasfamous.作为作家，他是很有名的。当……Wecameinasheopenedthedoor.他一开门，我们就进来了。因为，由于Imuststopwritingnow,asIhaveratheralotofworktodo.我此刻必须停笔了，因为我还有许多工作要做。按照Remember,youmustdoeverythingasItoldyou.记住，你必须按我说的那样把每件事做好。一…就…AssoonasIgettoBeijing,I’llwritetoyou.我一到北京，就给你写信。拓展3.for由于，表明附加理由（解释或推断），为并列句，for分句不放于句首,语气最弱。1.Hemustbeill,forheisabsenttoday。2.Itmusthaverainedlastnight,forthegroundiswet.zxxk4.for与because,as,since的区别Thefuelmusthavebeenfinished,_____theenginestopped.A.sinceB.asC.becauseD.forbecause,as,since表示因果，语气较强；for引导的是并列分句，它只是对前面的分句加以解释，说明推断的理由，并且后置。becausesinceas的用法区别•HeintroducedmebecauseIwasnew.•Iwasnew,soheintroducedme.•Sinceyouaregoing,Iwillgo,too.•Asitisraining,you’dbettertakeataxi.引导词意义位置because因为强调未知原因后接表示直接原因的句子多后置so所以强调结果后接表示结果的句子多后置since既然表示已知显然的理由后接表示知道的原因的句子常前置as由于常前置AnartfestivalB1Danieldecidedtoplaytheviolinattheartfestivalsince/asheisgoodatit.1.Danieldecidedtoplaytheviolinattheartfestival.Heisgoodatit.______________________________________________________________________2.Kittywilldanceatthesonganddanceshow.Shehastopractisehardthesedays.______________________________________________________________________3.Sandywilldesignthepostersfortheartfestival.Shecandrawverywell.______________________________________________________________________Since/AsKittywilldanceatthesonganddanceshow,shehastopractisehardthesedays.Sandywilldesignthepostersfortheartfestivalsince/asshecandrawverywell.Since/Assomestudentslovepaintingandtakingphotos,therewillbeastudents’artshow.Since/Astheartfestivalisopentoallstudentsandparents,everybodyiswelcome.Languagepointsoutofbreath•breath的词性是名词，意思是呼吸。短语outofbreath的意思是气喘吁吁，上气不接下气。breath的动词形式时breathe，例如呼吸新鲜空气breathefreshair，呼吸沉重breatheheavily。last•last在文中的词性是动词，意思是持续。例如：这场雨会持续多久啊？Howlongwilltherainlast?B2:HelpSandycompleteherdiaryentrywithbecauseorsince/as.becauseSince/AsSince/Assince/asbecausebecauseSince/As原因状语从句(AdverbialClauseofCause)1.becausesinceasfor的用法区别•HeintroducedmebecauseIwasnew.•Sinceyouaregoing,Iwillgo,too.•Asitisraining,you’dbettertakeataxi.•Itmusthaverainedlastnight,forthegroundiswet.意义位置becausesinceasfor因为既然由于因为强调未知原因表示已知显然的理由常用于推断、补充解释多后置常前置常前置后置中考链接()1.Tonyneverspendsmoneyonbooks______hedoesn’tlikereading.A.butB.becauseC.thoughD.until()2.____everyoneishere,let’sstartourmeeting.A.SinceB.IfC.ButD.As()3._____thegirlis22,shetakescareofhermotherandcooksmealseveryday.A.IfB.ButC.ThoughD.AsBAD选择题：（）1.Whywashelateforschool?____hegotuptoolate.A、BecauseB、SinceC、AsD、For（）2.IsDavidatschooltoday？No,heisathome____hehasabadcold.A、becauseB、sinceC、asD、for（）3.Itrainedlastnight,___thegroundiswet.A.becauseB.sinceC.asD.for（）4.______youarewrong,youshouldsaysorrytohim.A.AsB.SinceC.becauseD.For小试身手AADBMoreexercises1.----Whyareyoulate?----________(因为)Imissedtheearlybus.2.___________(因为）illness,myuncledidn’tgotowork.3.______(由于）thewaterhereispolluted,