i was doing my homework when a boy rushed into the classroom

问题描述:

i was doing my homework when a boy rushed into the classroom
为什么不用WHILE,而一定要用WHEN

这是when的特定用法,在这里翻译成:这时,突然
while没有这个意思
所以翻译出来是:我在作业的时候这时一个男孩冲进了教室