2019-2020学年外研版高中英语选修6课件:英语状语从句
2019-2020学年外研版高中英语选修6课件:英语状语从句第2页

 when / while 当……时

3) While: 引导的从句,所用的谓语动词必须是可以延续的,即延续性动词或be + adj.

Can you look after my pet dog __________ I’m away.

2. I fell asleep __________ I was reading.

while

while