He is certainly in a tight corner now.

他现在显然是身处困境了。

In a tight corner, you must try harder.

困难的境地，你得更加地努力。

My father helped me when I was in a tight corner.

我处于困境时我父亲帮助了我。

He appears to have backed himself into a tight corner.

他似乎已把自己逼入了困境。

Unless he gets some money, soon he will be in a tight corner.

除非他马上搞到钱，不然他就会陷入困境。