I am off duty today.

今天我歇班。

《新英汉大辞典》

I am off tomorrow. Can you be my deputy for tomorrow.

我明天请假一天，你可以做我的职务代理人吗。

youdao

Bye Mom, I am off to school now!

妈妈再见，我去学校啦！

youdao

"I told you before and I am telling you again: get off my land!"

VOA: special.2010.03.20

Now what I am going to do, this is off of just that one central cation.

接下来，这只是对一个中心阳离子的推导。

麻省理工公开课 - 固态化学导论课程节选

So I am basically living off my savings in this country to study, this time around.

所以这次在这里学习，基本上是靠我的积蓄过活，

怡人的的汉普斯特德 - SpeakingMax英语口语达人

And then I am off first thing Monday morning - weather permitting of course.

BBC: Explorer set for historic Arctic adventure

Am I off base here?

ENGADGET: Ask Engadget HD: DISH Network or DirecTV? HD

I, too, am guilty of putting off doctor appointments when I am ill because it is more stressful to me than the illness.

FORBES: CarePlanners �C Alan Blaustein and Nancy Snyderman, MD