高考英语状语从句考点复习突破原因从句和结果原因从句除了下面A2，A3中所示各种类型外，这两种从句均可由as或because来引导。但是用as引导原因从句较为稳妥（参见A）；用because引导结果原因从句较为稳妥（参见B）。A 原因从句1 由asbecausesince 引导的原因从句：We camped there asbecausesince it was too dark to go on我们在那里露宿是因为天太黑，不能再继续往前走了。AsBecauseSince it was too dark to go on，we camped there因为天太黑不能再继续往前走，我们就在那儿露宿了。2 in view of the fact that可用assinceseeing that来表示，但不能用because：AsSinceSeeing that you are here，you may as well give me a hand既然你在这儿，你就帮我个忙吧。
