I'm just minding my own business. 我正在做自己的工作。
Mind your P's and Q's! 注意你的言行舉止!
I'll thank you to mind your own business. 如果你不干涉別人的事情,我就特別感激了。
Why can't you mind your own business? What is your problem? 你為什么要干涉別人的事情?你到底有什么問題?
I think I'm going to ask them what they're talking about. 我覺得我應該問問他們在聊些什么。
Why don't you mind your own business? 你怎么不管管你自己的事情?