they had a nice time,didn't they?当中,didn't they可以改为hadn't they吗?

不可以,因为had 是实义动词,不是助动词I have a good friend.为什么可以答
haven't I?这里的have 是作‘ 有’ 解，可能用：haven't I ; 也可以用 don't Ithey had a nice time.had 也可以表示有的意思吧?have a nice time过得愉快，玩得开心