have been + n.是什么用法,(thanks a lot)

问题描述:

have been + n.是什么用法,(thanks a lot)
是have been + 名词 的用法,不是+过去分词,也不是现在分词的。

上面的答案好象答得文不对题吧...
have been +n.是be的现在完成时形式.
例如:He has been a teacher since he graduated.
他自从毕业就一直在当老师.