how long和how much time 有什么区别?

how long和how much time 有什么区别?
how long和how much time 有什么区别?

how long和how much time 有什么区别?
how long 问多长时间 持续性的 回答用for+一段时间或者since+表过去的时间点
how much time只需用时间回答就行了