It does not concern me at all.

此事与我无关。

He is not concerned in the crime.

他与这件罪状无关。

I am not concerned in that.

我不关心那件事。

I don't concern myself with politics.

我不参与政治活动。

Her bad cough concerned her friends.

她严重的咳嗽使其朋友担忧。

I am much concerned to hear the news.

听到这消息令我很担心。

It is no concern of mine.

这事与我无关。

He feels no concern about her disappearance.

她的失踪并不使他忧虑。

The concern was going to fail.

公司行将倒闭。