I have to see you one more time before you took off 这里的take off为什么是过去式

I have to see you one more time before you took off 这里的take off为什么是过去式
I have to see you one more time before you took off 这里的take off为什么是过去式

I have to see you one more time before you took off 这里的take off为什么是过去式
那是被动形式,不是过去式

（飞机）起飞前再见你一次

因为before，所以后用过去式

我觉得是题有问题。不该过去式。

在你起飞（离开）之前我必须再见你一次。