"don't need to" 与 "don't have to"、"needn't" 的意义相同吗

"don't need to" 与 "don't have to"、"needn't" 的意义相同吗 英语语法don't have to 与 don't need to的区别和用法don't need to和 needn' needn't to come,don't need come,don't need coming与needn't co needn't needn't have done 和don't need to 的区别 don't need to 和needn't couldn't don't have to needn't的区别 needn't do sth与don't need to do可以通用吗? don"t need和don't have to 的区别? needn't与don't need needn't 和 don't need to 有什么不同? needn't和don't need to有什么区别?haven't和 don't have 有 能否解释一下musn't,needn't ,don't have to,can't ,couldn't的区别?