My leg has hurt for three days.

我的腿痛了三天。

I have to ask for three days' leave.

我得请三天假。

Jim has been in Japan for three days.

吉姆已经在日本三天了。

My son, Ali, has been sick for three days now.

我的儿子阿里已经病了三天了。

The general searched for three days and found a happy person.

将军找了三天，找到一个快乐的人。

The festival falls on the fourth day of the sixth month of the lunar calendar, usually lasting for three days.

这个节日在农历六月初四举行，通常持续三天。

The storm lasted for three days.

暴风雨持续了三天。

This trip will last for three days.

这次旅行将持续三天。

We stay in this city for three days.

我们在这个城市逗留了三天。

Her fever has lasted for three days.

她的热病已经持续了三天。