must 和 have to 有什么不一样?mustn't 和 don't have有什么不一样?

must 和 have to 有什么不一样?mustn't 和 don't have有什么不一样? 英文mustn't,don't have to,doesn't have to,didn't have to有什么区别 must 和 have to 的异同?mustn't 和 don't have to 的异同? can/can`t/must/mustn`t/need/needn`t/have to/到底有什么区别?如题 谢谢了 needn't和don't need to有什么区别?haven't和 don't have 有 don't have和have no有什么区别? haven't和don't have 有什么不同? haven't和don't have有什么区别 haven't got 和don't have有什么不同 don't have 和 haven't 有什么区别. don't have和haven't有什么区别? don't have 和 haven't 用的时候有不一样的吗?分别该怎么用呢?