It's none of your business. 新概念英语第2册的第一篇课文。
一楼无误
不关你的事
It's none of your business没有错。
和it's not your business一样。
这事情跟你没有关系
There is nothing to do with you.
不知楼主问到底哪个意思。
It's none of your business.与你无关。
Mind your own business.不要插手。
一楼是对的,不过这样讲态度比较强硬。
It's none of your business
要想地道一点,说:
Mind your own business.
Don't put your finger in the pie.