(外研选修8)山东省淄博高级中学module4 which English grammar课件 外研版 选修8
(外研选修8)山东省淄博高级中学module4 which English grammar课件  外研版 选修8第3页

1.时间状语从句:

引导时间状语从句的连词有:

when, while, as, the moment, before, after, till, until, since, as soon as 等。

请注意 when, while, as 的区别