句子中的has been ,have been,had been 代表什么?

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句子中的has been ,have been,had been 代表什么?
完成时,和过去完成时吗?可以翻译成什么?
“jeff is a boy,for the past three years,has been a good fried of mine.

has been ,have been,现在完成时,已经去过
,已经成为,已经持续,
eg:she has been to Shanghai.他去过上海
I have been there before我以前去过那
She has been a teacher他已经成为一个老师
the film has been on for an hour,电影已经持续一个小时了
had been过去完成时,过去的过去
the film had been on for an hour before we got there

句子中的has been ,have been,had been 代表什么? have been / has been / had been 的区别 have been 和had been 什么区别 have been 与had been had been 和 has/have been的区别是什么? have,has,have been,has been在什么情况下用啊? have/has/had加been是什么时态 had/have/has gone/been 的区别请问have\has\had done和have\has\had been done 各有什么区别?been和gone又 has been和had been 有什么区别? have/had + been/be? had been和have been有什么区别?请举例