摘要：原因状语从句是表示原因和理由的从句.引导原因状语从句的有as, because, since, now , considering that, seeing that等. A．because because因为 Because I like it, I do it. 因为我喜欢.所以我才干. He couldn't have seen me, because I was not there. 他不可能见过我.因为当时我不在那儿. 比较: because 和for的区别.1．for 是并列连词.只用于连接表示原因的分句.因此不能用于句首.because表示原因时.可位于句首. [误]For he did not obey the rules, he was punished. [正]Because he did not obey the rules, he was punished. 由于他不遵守规章制度.他受到了处.

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