题目内容：

when 和 what time 有什么区别?
如题.

优质解答

when:conj.当...时pron.&ad.什么时候例句与用法:1.When did that happen?那件事是什么时候发生的?2.Turn off the switch when anything goes wrong with the machine.如果机器出故障,就把开关关掉.3.He was fond of ...