时间状语从句就是表示时间的状语从句，时间状语从句常见的引导词有：when、while、before、after、since、until、as soon as、the moment、the minute等等。
1.at or during the time that意为“当....时”，从句动作和主句动作：同时发生。
例句：I loved history when I was at school.
When she came in, I was eating.
例句：Call me when you've finished.
3.just after which意为“就在那时..."或“...忽然...”之意。
例句：We were about to leave when he came in.
1.at the same time as sth else is happening意为“当....时”，主从句动作同时发生。
例句：While my wife was reading the newspaper, I was watching TV.
2.during the time that sth is happening意为“在...期间”，主句动作发生在从句动作过程中。
例句：Please look after my little dog while we are away.
While they were talking, the bell rang.
例句：Just as he was speaking there was a loud explosion.
例句：The students took notes as they listened.
例句：As she grew older she gained in confidence.
例句：I have been teaching in this schoolsinceI left college.
五、as soon as、the moment、once
例句：I'll contact you as soon as you come back.
例句：The machine will work instantly you press the button.
六、no sooner than、hardly/scarcely...when
例句：I had hardly got homewhenit began to rain.