man是可数名词还是不可数名词

Since he changed jobs he's looked like a new man.

他跳槽之后像换了一个人似的。

They were the first men to land on the moon.

他们是首批登上月球的`人。

He's the right man for the job.

他是这份工作的合适人选。

Come on, now ─ be a man.

快点儿，像个男子汉的样子。

He's not a well man.

他身体不太好。