You may use his eraser, ______?为什么是mustn't you呢?

问题描述:

You may use his eraser, ______?为什么是mustn't you呢?

may 的反意疑问词就是 mustn't 呀~
表示"为什么不呢?"。要记住哦~

这是固定用法.背下来

mustn't you的英语解释
Mustn't you is a question tag,a phrase that is added to the main part of the sentence,inviting the listener to confirm the opinion of the speaker.

是规定.
所以要记住这几个针对情态动词的反意疑问句的提 法.