when doing sth是不是时状从

如题所述

推荐答案 2016-03-01

只要主语和状语从句主语一致都可以用分词作状语来代替状语从句，可根据情况用现在分词现在分词的完成形式过去分词等作状语。
如 when passing the house, he saw a girl playing the piano.
= when he passed the house ,he saw................
when asked ,he didn't answer .
= when he was asked ,he didn't answer.

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