【5A版】原因状语从句和目的状语从句.ppt

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原因状语从句 原因状语Afraidofbeinglate,theycamebytaxi.因为怕迟到，所以他们坐出租车来的。Thankyouforremindingme.谢谢你提醒我。 I’llhavetohavemywatchreplacedbecausethereissomethingwrongwiththealarm. 引导词Because，since，as等语气强弱because>since>asbecause不知道原因since原因明显，已知as双方都知道 Theybumpedheroff________sheknewtoomuch.因为她知道太多，所以他们把她干掉了。_____youarefreetoday,youhadbetterhelpmewithmymathematics.既然今天你休息，你最好帮我补习数学。____itisraining,you’dbettertakeataxi.因为在下雨，你最好乘出租汽车。becauseSinceAs （1）回答why，只能用because。A：Whycan’tIgo?B：_______youaretooyoung.Because （2)不能将because,since,as等与so连用。2.________heisill,______hecannotcome.A.Because,/B.Because,soC.Though,butD.Though,/A because和becauseofbecause+从句becauseof+名词短语他因病不能来。Hecan’tcomebecauseheisill.Hecan’tcomebecauseofhisillness. Readandcombine.Iboughtthehousesimply.Itislarge.→Iboughtthehousesimplybecauseitislarge. Languageinuse1.Everybodystaysunderthetree.Itisveryhot.→Asitisveryhot,everybodystaysunderthetree. Languageinuse2.Theboycouldn’tdrawmoneyfromtheATM.Heforgotthepin.→Theboycouldn’tdrawmoneyfromtheATMbecauseheforgotthepin. Languageinuse3.Iwillexplainagain.Youdonotunderstand.→Sinceyoudonotunderstand,Iwillexplainagain. 目的状语从句 引导词sothat，inorderthat等“以便” Ilenthim$50inorderthathemightgoforaholiday.我借给他50美元，以便他能去度假。他早起以便他能够赶上首班车。Hegotupearlysothathecouldcatchthefirstbus.谓语前常含有may,might,can,could,should,would等情态动词。