在英语过去进行时中,when 和while 在用法上有什么区别?

When可接过去时和过去进行时，While只能接过去进行时

分句谓语若为“延续性”动词，则两个词可以互换，若为“终止性”动词，则只能用when,不能用while
eg: When/While I was studying there,I began to learn skiing.
When(not While) his father died,he was only 5 years old.

while延续性的，只能和ing形式的用……

when都可以……