They have stayed here for a few days,haven't you?为什么不能用 don't you?而Jane has to stay here all day,doesn't he?为什么不能用hasn't
问题描述：
They have stayed here for a few days,haven't you?为什么不能用 don't you?而Jane has to stay here all day,doesn't he?为什么不能用hasn't he?老师说那是因为has 没有拥有的意思 那第一句的理由呢?
答
第一时间为你提供正确答案：
因为第一个句子是现在完成时,主语复数they,所以用haven't you.
而第地个句子是一般现在时,主语三单,所以用doesn't he.
You must go home, needn't you? 为什么不能用mustn't you?呢语法就是这样规定的There is no use to do/doing?
It is no use to do/doing?
It is useless to do/doing?
这些到底是to do 还是doing?第三个有这个说法？