_____you leave,Don't forget to turn off the light.是用before还是用after.

问题描述:

_____you leave,Don't forget to turn off the light.是用before还是用after.

before

感觉是when,有么?

选before
在离开之前别忘记关灯.
如果是after,意思就不通顺了.离开后怎么关灯呢?