Question

difficult time中的time后面加不加S?

Answer 1

都可以.

difficult times:困难时期,例如：

We all go through difficult times.

我们都会经历困难的时刻.

difficult time：难受的日子,例如：

Cherylasks the media to respec ther privacy during this difficult time.

谢丽尔请求媒体在这个艰难的时刻尊重她的隐私.