on the days?in the days?

问题描述:

on the days?in the days?
The days on which black people in the country could not travel without a pass are gone forever.
You will make great progress in the days to come.
两种用法都用?那有什么区别么?

in + 时间指的是未来I'll be here in 10min.十分钟之后到.on the days是 在那些日子里也有时候看到用 in the days表达那些日子里的意思,但是记住不要在考试的时候想起来就行了Orz..扩展一点,the days on which we li...