needn't sth与don't need sth有什么区别?

needn't sth与don't need sth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 to come,don't need come,don't need coming与needn't come的区别 don't need to 与 don't have to、needn't 的意义相同吗 needn't do sth与don't need to do可以通用吗?有没有区别呢?请知道的朋友尽快回复, don't need,needn't 的区别 don't need 等不等于 needn't don't need to do 与needn't do 有什么区别?还有needn't 是否只能用于一般现在时? they needn′t to do sth 还是 they needn′t do sth? couldn't don't have to needn't的区别 什么是行为动词,什么是情态动词.don't need与needn't 什么是行为动词,什么是情态动词.don't need与needn't needn't与don't need的区别什么时候用前者,什么时候用后者? need to do sth,need do sth.needn`t do sth和don`t need有什么不同!need to do sth,need do sth.needn`t do sth和don`t need有什么不同,我们今天刚学,但是我没听懂,好象是说哪个是情态动词哪个是动词!但是,它们的用法 needn't 与mustn't的区别? needn't needn't have done 和don't need to 的区别 needn't 和 don't need 的区别 needn't 和 don't need to 有什么不同?