今晚是谁在医院值班？

Jīnwǎn shì shéi zài yīyuàn zhíbān?

Who is on duty at the hospital tonight?

前台二十四小时有人值班，有问题可以随时打电话。

Qiántái èrshísì xiǎoshí yǒu rén zhíbān, yǒu wèntí kěyǐ suíshí dǎ diànhuà.

There is someone on duty at the front desk 24 hours a day; you can call anytime if you have a problem.

我这个周末要在公司值班，不能跟你们一起出去玩了。

Wǒ zhège zhōumò yào zài gōngsī zhíbān, bù néng gēn nǐmen yìqǐ chūqù wán le.

I have to be on duty at the company this weekend, so I can’t go out with you.