hasbeen后加dead还是death

hasbeen后加dead不是death。death 是名词而dead是形容词和be构成系表结构。中文意思是“已经死了”，

例如，我们都知道他的爷爷已经去世十年了。

We all know that his grandfather has been dead for ten years.

当救援人员及时赶到时候，这条鲸鱼却已经死了。

When rescuers arrived in time, the whale had already been dead.