there'd have to be a pretty strong to keep me on that plane 这是什么时态的语法 there'd have to be

虚拟语气，表示的是一种假设，但是事实未必如此。

There'd have to be a pretty strong reason to keep me on that plane. Well, knowing Cameron, I'm sure there is a good reason. Uh, maybe, if you, if you do see him or if you talk to him...maybe you could just tell him to come home, all right?
答：你漏打了一个关键词reason。
There'd have to be 是There would have to be的缩略形式。
would have to be是 是be的情态式。there be表示“存在”,“有”，
There have to be表示“必须有”，“得有”，have to与must不同之处，除了表示“客观”上的原因，“不得不”外，还有时态的变化，would +V 从形式上是表示“过去将来”时态。但实际上这里并不是表示“过去的将来”，而是虚拟语气的一种应用。
意思是：想让我呆在那架飞机上，得有一个相当站得住脚的理由。

虚拟语气 would have to

过去完成时态 there had have to be

there'd have to be=the would have to be
have to,情态动词
这是过去将来时的时态
为了阻止我上飞机,他们（那时）不得不表现的野蛮了一些