改错:(1)The day breaks because the birds are singing.(2)Because the earth is round,why do we not fall off?(3)Because it is raining,we’d better stay here.请写出分析过程.谢谢!
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1) cause-----for,because表示充分必要的理由,回答why的提问,for表示推断理由,因为鸟叫了不是天亮的必然充分且必要的理由,只是由"鸟叫"推出天可能亮了.(2)Sincetheearthisround,whydowenotfalloff?because--since,既然,由于,since表已知的事实,(3)Since/Asitisraining,we’dbetterstaycause----since/as,同上,as语气比since弱.