_Singular_ _Plural_
1st. I have been seeing. We have been seeing.
2d. You have been seeing. You have been seeing.
3d. He has been seeing. They have been seeing.
+139.+ +The past perfect progressive describes an action which was
continuing or progressing at some past time. It is formed by using the
past perfect time form of the verb _be_ and the present participle.+