The word 加班 is formed by combining the character 加, meaning "to add", with the character 班, meaning "shift" or "work period", to directly create a term meaning "to add a shift", which refers to working overtime.
我今天需要加班。
Wǒ jīntiān xūyào jiābān.
I need to work overtime today.
加班让我很累。
Jiābān ràng wǒ hěn lèi.
Working overtime makes me very tired.
我昨晚加班到十点。
Wǒ zuó wǎn jiābān dào shí diǎn.
I worked overtime until ten o'clock last night.
如果工作多，我们就加班。
Rúguǒ gōngzuò duō, wǒmen jiù jiābān.
If there is a lot of work, we work overtime.
为了按时完成项目，团队决定加班。
Wèile ànshí wánchéng xiàngmù, tuánduì juédìng jiābān.
In order to complete the project on time, the team decided to work overtime.
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