我在医院住了一个月。

Wǒ zài yīyuàn zhùle yí gè yuè.

I stayed at the hospital for one month.

我们都在医院工作。

Wǒmen dōu zài yīyuàn gōngzuò.

We all work at the hospital.

他昨晚不舒服进了医院。

Tā zuówǎn bù shūfu jìnle yīyuàn.

He didn't feel well last night and went to the hospital.