while sb was/were doing与when sb was/were doing

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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

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

while sb was/were doing与when sb was/were doing sb was doing sth while+过去进行时,是不是总是sb.+was+doing sth were sb doing还是were sb did sth? what were you doing while i was away last week saw sb doing还是was doing when while and see sb doing sth sb was doing sth when sth +动词过去式是什么时态 1主语+was/were doing when...2主语+was/were about to do when...3主 What were you doing yesterday afternoon when I was watching 特殊疑问词+was/were+主语+doing was/were后接doing还是did