needn't是等于don't need to还是don't need.为什么?“你不必为他的学习担心”是you needn't to worry“你不必为他的学习担心”是you needn't to worry about his study还是you needn't worry about his study?

don't need,needn't 的区别 don't need 等不等于 needn't need的否定形式need的否定是needn't还是don't need 用法怎么样 don't have to等于什么RTdon't have to等于////needn't to 还是don't need to? needn,t .do 是不是等于don,t need to do 一个是情态动词 一个时实义动词 need的否定句什么时候是needn’t 什么时候是don’t need needn't是等于don't need to还是don't need.为什么?“你不必为他的学习担心”是you needn't to worry“你不必为他的学习担心”是you needn't to worry about his study还是you needn't worry about his study? 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 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? needn't和don't need的区别和用法? don't need 和 needn't 有什么区别? needn't don't need它们的区别 We ________much sleep.(don't need,needn't) you _____pay for the book if you _____itA don't need to ;needn't B don't need ;don't need C needn't ;needn't D needn't ;don't need 英语翻译为什么用needn't而不用don't need, needn't to come,don't need come,don't need coming与needn't come的区别