while sb was/were doing与when sb was/were doing
问题描述：
while sb was/were doing与when sb was/were doing
有什么区别呢?
什么时候用前者,什么时候用后者
答
两者解释都没有差异
但是
while是指一件事发生的过程,一般用进行时
如While I was doing my homework, my sister was playing.
when是指一个瞬间,用一般时就可以了
如When I finished the homework(finished the homework是一瞬间的事), my sisiter was still playing.
通常情况下,两者可以互换