He's still not understood by his close friend although he has said sorry to him,___?

问题描述:

He's still not understood by his close friend although he has said sorry to him,___?
he 为什么不选hasn't he?可以用那些语法知识解答?

反义疑问句
陈述部分肯定式+疑问部分否定式 可记为 前肯后否
陈述部分否定式+疑问部分肯定式 可记为 前否后肯
They work hard,don’t they?主从句都有动词,反义疑问句的动词应跟主句还是从句的形式?根据主句的主语那我问的这句是不是前面部分是主句?呵呵 ~~我分不太清