offduty的意思是下班的； 不在值班的。
一、相关例句：
1、A herd of commuters got off the train.
一群乘火车上下班的人走下火车。
2、I'll stop by when I get off work.
我下班的时候会顺便来看看的。
3、Policemen wear their uniforms when they are on duty.
警察在值班的时候都穿著制服。
4、You are very lucky I am on duty, and can't be bothered with a troublemaker like you.
你很幸运，我正在值班，所以不会在你这样爱惹事的家伙身上操多少心。
5、He usually comes off duty at 5 p.m.
他通常下午五点下班。
6、Only one doctor is on duty today the other doctor is off duty.
今天只有一个医生值班，另一位下班了。
以上内容参考：海词
