We had to wait a long time to get our passport,___?

题目

We had to wait a long time to get our passport,___?
I had to tell the truth ,___?
我想问下 这2题的 为什么第一题是 didn't we 而第二题 don't i
不都是过去式?

答案

had to在这里是虚拟语气,表示疑问,所以用过去式,但不是表达过去发生的事情,而回答没有用虚拟语气,所以用一般现在时
I had to tell the truth ,__don't i _?
意思：我本应该说真话的,不是吗?