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Tolearntouseadverbialclausesofreason＆becauseof1.HedistrustedmebecauseIwasnew.2.Asalltheseatswerefullhestoodup.3.Since/Aswe’venomoney,wecan’tbuyit.4.Thechildrenwokeupbecauseofaloudnoise.5.Iwaslatebecauseoftheheavytraffic.1.Hedistrustedme________Iwasnew.2.____alltheseatswerefullhestoodup.3.___________we’venomoney,wecan’tbuyit.4.Thechildrenwokeup___________aloudnoise.5.Iwaslate__________theheavytraffic.becauseAsSince/AsgoReady?becauseofbecauseofFillintheblanks.用because,as,since或becauseof连接下列句子。1.Iwenttobedearly.Iwouldtakeatestthenextday.(because)IwenttobedearlybecauseIwouldtakeatestthenextday.2.Heisready.Wecangonow.(Since)Sinceheisready,wecangonow.3.Ididn’tgotoMary’sparty.Iwasnotinvited.(as)Ididn’tgotoMary’spartyasIwasnotinvited.4.Wehadtostayathome.Itrainedheavily.(becauseof)Wehadtostayathomebecauseoftheheavyrain.状语修饰动词、形容词、副词或整个句子。当状语为句子时即为状语从句，一般可以用来表示时间、地点、原因、结果等概念。原因状语从句常用引导词：because，since，asMarkisabsenttodaybecauseheisill.马可今天没来，因为他病了。Ashewasinahurry,Jacklefthisbaghome.由于走的匆忙，杰克把包落在了家里。because1.because表示的原因是必然的因果关系；语气最强；通常在主句之后，有时也在主句之前。2.回答why提出的问题，只能用because回答。-Whycan’tIgo?-Becauseyouaretooyoung.since1.since引导的从句置于主句之前，表示已知的，显然的理由。“既然”，较为正式，语气比because弱。Sinceyouarefreetoday,youhadbetterhelpmewithmyEnglish.2.Since可用于省略句，其他不能Sinceso,thereisnomoretobesaid.asas引导的原因状语从句时表示附带说明的“双方已知的原因”，语气比since弱，较为正式，位置灵活（常置于主句前）。Asitisraining,you’dbettertakeataxi.Iwenttobedearly,asIwasexhausted.ThepoliceofficeraskedTomsomemorequestionsaboutthealiens.Matchthequestionswiththeanswers.Thenusethemtocompletethepoliceofficer’snoteswithas,sinceorbecause.badcTinaandIhidbehindsomebushesasweheardsomevoicesspeakingastrangelanguage.Becauseanaliensawusandmadeaterriblenoise,weranaway.Sincenooneelsesawthesealiens,ourfatherrefusedtobelieveus.Becauseof句型becauseof也可以用来说明原因，但它的后面通常跟名词（短语）、代词或V-ing形式等。如：Hecan’tgotoschoolbecauseofsickness.他因病不能上学。Iwenttothepartybecauseofhim.因为他，我去参加了聚会。Thisboydidn’tdohishomeworkbecauseofskating.这个男孩因为滑冰而没有做家庭作业。Writesentencesaboutthestoryonpage99usingbecauseof.Tinawassurprisedbecauseoftheyellowlightinthesky.Thealienslandedonthisplanetbecauseofanaccident.Thechildrenranawayfromtheforestbecauseofthealiens.Theirdadwasnotsureaboutthechildren’sstorybecauseofthewritingonthepieceofpaper.注:另附word文档。点击此处链接I.单项选择。1.--Tomisn’tfeelingverywell.--Heseemstohaveacold____theweatherchangessuddenly.（2012安徽）A.beforeB.soC.becauseD.though2.________youaresoweak,you’dbetterstayathome.A.SinceB.ForC.BecauseD.Though3.Thedoctortoldthepatienttogoonadiet______hewasoverweight.A.ontheconditionthatB.becauseC.forD.when4._____theweatherwasfine,Iopenedallthewindows.A.AsB.BecauseofC.ForD.With5.______youareleavingtomorrow,wecaneatdinnertogethertonight.A.ForB.SinceC.BeforeD.While6.Ihatetravelingbyair_______youusuallyhavetowaitforhoursbeforetheplanetakesoff.(2013上海，43)A.becauseB.thoughC.untilD.unless7.Mr.Greencan’tgotothemeeting______hehasabadcold.(2013北京，39)A.becauseB.unlessC.whetherD.although8.MoYan’sbookshavebeensoldoutinmanybookstores_____hiswinningoftheNobelPrizeinLiterature.(2013四川宜宾)A.becauseB.sinceC.asD.becauseof1.Shewaswellpaid,_____shedidherworkwell.2.______theearthisround,whydowenotfalloff?3.Ididit_______theyaskedmetodoit.4.Iwaslate________Ididn’tcatchthebus.asSincebecausebecauseⅡ.填入适当的引导词。Ⅲ.用becauseof和方框中的词完成答句。acaraccidentherillnessitshighpricehisbrokenleglastnight’sstormtheheavytraffic1.A:Whyareyoulate?B:I’mlate_________________________.2.A:Whydidn’tSuecometoschooltoday?B:Shedidn’tcometoschooltoday_________________________.becauseoftheheavytrafficbecauseofherillness3.A:Whywastherenoelectricitythismorning?B:Therewasnoelectricitythismorning_________________________.4.A:Whyisthereatrafficjam?B:Thereisatrafficjam_________________________.5.A:Whydon’tyoubuythevase?B:Idon’tbuythevase__________________________.becauseoflastnight’sstormbecauseofacaraccidentbecauseofitshighpriceHomework1.Reviewthegrammarwe’velearnedtoday.2.FinishtheexercisesinLearningEnglish.3.PreviewSpeakingonpage106.