2019-2020学年外研版高中英语选修6课件:状语从句课件 (2)
2019-2020学年外研版高中英语选修6课件:状语从句课件 (2)第3页

________________________(下课的时候), we began our writing. John sings________________(边走). _________________________(我们看电视的时候), he was writing a composition.

When the lesson was over

as he walks

While we were watching TV

注意:

1. when, as, while 的区别

when: 持续性/非持续性动词都可 as: 当;一边…一边;随着 while:持续性动词/ 进行