英文mustn't,don't have to,doesn't have to,didn't have to有什么区别这几个词各自_英语解答

英文mustn't,don't have to,doesn't have to,didn't have to有什么区别
这几个词各自的意思是什么?
我是在做练习时遇到这题目.要我选择哪一题用哪一个词.

人气：421 ℃　时间：2019-11-24 01:12:08

解答

mustn't,比don't have to语气强烈,其他的就是时态和第几人称的问题