2. as 用法总结 1.引导时间状语从句 当…时 (一边…一边…) As I left the house I remembered the key. As he slept he dreamed a dream. 2.引导原因状语从句 因为，由于，既然 As the seats were full he stood up. 3.引导方式状语从句 依照，按照，像…那样 I have changed it as you suggest. 4.引导让步状语从句 虽然，尽管 Poor as he was, he was honest. 5.引导非限制性定语从句 正如 Taiwan, as is known to all, is a part of China.