Looking on the internet deeply has found these results:

I have been is the most popular phrase on the web.

I were 1113,000,000 results on the web	I have been 1811,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
When you and I were together... Terry and I were working through it. Fisher and I were worried about how ZBZ would handle our relationship. Carter and I were just sharing Chuck Bass stories. I wouldn't if I were you. I'd stop if I were you. Druthers and I were alone in the office. Raffaele and I were at his apartment.	I have been wrongly accused of murder. I have been taken prisoner by a young Kazon. I have been brought back from my holiday in California to sort it out. I have been perfectly polite with the board. I have been a little abrupt with people. I have been told that the radio carries traffic reports. I am only doing what I have been trained to do. Ladies and gentlemen, I have been awarded the privilege of introducing our guest of honor tonight.

I were

1113,000,000 results on the web

I have been

1811,000,000 results on the web

More popular!

I have been wrongly accused of murder.
I have been taken prisoner by a young Kazon.
I have been brought back from my holiday in California to sort it out.
I have been perfectly polite with the board.
I have been a little abrupt with people.
I have been told that the radio carries traffic reports.
I am only doing what I have been trained to do.
Ladies and gentlemen, I have been awarded the privilege of introducing our guest of honor tonight.