题目内容：

You never told us why you were late for the party ? weren't you didn't you did you were you
为什么是c不是d
我知道never是否定,前否后肯

优质解答

因为这是对主句 反问
主句是行为动词一般过去时的否定形式 所以用did you
不用were you.因为它不是行为动词的疑问形式 而是be动词的疑问形式

追问：

行为动词是哪个呢亲？不太懂这块…

追答：

行为动词即实意动词,表示动作的动词。本句told就是行为动词tell的过去式
如he told her about it,didn't he?
did he tell her about it?