why did you come back so late today?it heavily when the meeting was over .I had to wait until it came to a stop 为什么?处要填w
问题描述：
why did you come back so late today?it heavily when the meeting was over .I had to wait until it came to a stop 为什么?处要填was raining还有when与while的区别是什么?
答
当时在下雨,下雨已经是过去的事了,所以要用过去式was,在过去的那个时间点,当时是在下雨的,所以那时候的雨是过去的正在进行时.
when 和while 都有当...的时候的意思
when既可指时间点,也可指时间段
while只能指时间段
比如 ‘当早上5点到9点（时间段）’
while和when 都可以,
但是如果是 ‘当早上5点的时候（时间点）’,就只能用when