I will study harder and harder in the last year.

最后一年，我会好好努力学习的。

The students study harder and harder.

学生们学习越来越努力。

Encouraged by my parents, I made up my mind to study harder.

在父母的鼓舞下，我下定决心更加努力学习。

He will study harder from this time on.

他从此将会刻苦学习。