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1、-when-doing-的用法-第 2 页When + doing的用法Every teacher should, therefore, follow in his footsteps and emphasize benevolence when teaching.因此，每个老师教学时，应效法孔子并强调仁的道理。= Every teacher should,therefore,follow in his footsteps and emphasize benevolence when he teaches .在以when,while,if, once ,though,unless 等六个连词引
2、导的状语从句中，若主语与主句的主语相同时，可将从句中的主语删除，并将之后的动词变成现在分词。若是be动词，一律变成分词being,而being再予以省略。1. when you do the work, you should be careful.= When doing the work, you should be careful.2. If I am free, Ill do it.= If free, Ill do it.3. when you do the work, you must be careful.= When doing the work, you must be careful.4. Though he is poor, he is happy.= Though poor, he is happy.5. While I was watching Tv, I fell asleep.= While watching TV. I fell asleep.6. When you drive a car, you should be alert.= When driving a car, you should be alert.