原因状语从句和目的状语从句

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•becausesinceas•because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,/Abecause和becauseof•because+从句•becauseof+名词短语•他因病不能来。•Hecan’tcomebecauseheisill.•Hecan’tcomebecauseofhisillness.Readandcombine.•Iboughtthehousesimply.•Itislarge.•→Iboughtthehousesimplybecauseitislarge.1.Everybodystaysunderthetree.Itisveryhot.→Asitisveryhot,everybodystaysunderthetree.2.Theboycouldn’tdrawmoneyfromtheATM.Heforgotthepin.→Theboycouldn’tdrawmoneyfromtheATMbecauseheforgotthepin.3.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。