1.catch in 处于困境

But I have a train to catch in an hour. I'll give a lecture this evening and tomorrow.
不过我要赶火车，不到一小时了。今晚和明天都有课。

There is a catch in his question.
他的问话中有圈套。

2.as though 好像，仿佛

But the police never acted as though he was.
但警察的行为就好像他是非法的一样。

As though each of us were its first kill.
好像对于我们每个人它都是初试身手。