--Must I clean my room today?--No,you___ A mustn't B needn't我想Mus_英语解答

--Must I clean my room today?--No,you___ A mustn't B needn't
我想Must的否定形式应该是mustn't 但答案为甚给的是needn't呢?

人气：491 ℃　时间：2019-10-28 17:33:08

解答

must开头的一般疑问句,否定回答用don’t have to或needn't,不用mustn't(一定不,必须不,不允许,不得）,语气太强硬,这是固定用法.