every dog has its day,填does't it 为什么?

问题描述:

every dog has its day,填does't it 为什么?

前半句用了第三人称单数,而后半句反问别人的,所以用Doesn't it为什么不用hasn't祈使句的否定形式是用doen't it . 或didn't it.或don'tyou.