I haven't seen you for four years!

我四年没见到你了！

There was a small house four years ago.

四年前有一间小房子。

I'm going to study there for four years.

我要在那里学习四年。

Four years ago, they spoke only very little Chinese.

四年前，他们只会说很少的中文。

Wang Tao set up a small business in Shanghai four years ago.

王涛四年前在上海开了一家小企业。

Within six months, she was named a chief resident physician, a position that usually took four years to achieve.

六个月内，她被任命为首席住院医师，这个职位通常需要四年才能达到。

She lived abroad for four years.

她在国外生活了四年。

A leap year occurs every four years.

闰年每四年出现一次。

They have been married for four years.

他们已经结婚四年了。

The governors are elected every four years.

州长每四年选举一次。