1、being在现在时中通常用于系动词之后，而句子通常是被动语态。

2、being一般用在现在进行时，强调正在发生。

It is man's social being that determines his thinking.

社会存在决定人的思想。

That is no way to treat another human being.

那绝不是对待他人的方式。

How long can a human being go without sleep?

人不睡觉能活多久？