needn‘t和don't have to解释是什么?怎么用?
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
don't need to 和needn't
couldn't don't have to needn't的区别
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'
请教needn't have ,don't have to是什么意思?
needn't和don't need to有什么区别?haven't和 don't have 有
don't have to do sth 是否等于don't need to do sth 和needn't do st
能否解释一下musn't,needn't ,don't have to,can't ,couldn't的区别?
needn't 和 don't need to 有什么不同?
"don't need to" 与 "don't have to"、"needn't" 的意义相同吗
I needn't study.和I don't need to study.区别是什么?