i have been是什么时态

i have been是现在完成时态，完成时的动词结构是have / has + 过去分词；

I have been 我一直都在；

been

v.曾经;曾经到过(某地)；

are的过去分词;be的过去分词

I have been a faithful reader of your newspaper for many years.

我是贵报多年来的忠实读者。

I have been known to faint at the sight of blood.

大家都知道，我看到血就会昏倒。

I have been fortunate enough to visit many parts of the world as a lecturer.

我很有福气，去过世界许多地方作演讲。

I have been nominated to the committee.

我被任命为委员会委员。

My partner and I have been trying for a baby for two years

我和爱人两年来一直想要个孩子。

I have been given charge of this class

我被分配负责这个班。