needn‘t和don't have to解释是什么?怎么用?

needn't needn't have done 和don't need to 的区别 couldn't don't have to needn't的区别 needn't和don't need to有什么区别?haven't和 don't have 有needn't和don't need to有什么区别?haven't和 don't have 有什么区别? don't have to do sth 是否等于don't need to do sth 和needn't do sth needn‘t和don't have to解释是什么?怎么用? no you don't have to 和no you needn't哪个对 needn't和don't need的区别和用法? shouldn't,needn`t,don`t have to、won`t的区别, 区别shouldn't have done 和 needn't have done needn't 和 don't need 的区别 needn't 和 don't need to 有什么不同? don't need 和needn't 有什么区别啊? don't need 和 needn't 有什么区别? don't need to 与 don't have to、needn't 的意义相同吗 don't have to等于什么RTdon't have to等于////needn't to 还是don't need to? don't need,needn't 的区别 don't need 等不等于 needn't You ___to the meeting if you have no time1.needn't to come2.don't need coming3.needn't come