Thank you very much Grace!!! I have always had problems with these verb tenses, but now you clarified my doubts!

"I have been": This phrase, when used with an -ing word (for example, swimming, working, learning), indicates an action which happened in both the past and the present, or which only recently finished. A: What have you been doing this summer? B: I have been working. You were working earlier in the summer, and you still are working. A: Why are you so wet? B: I have been swimming. You were swimming in the past, and only finished recently. "I had been": Like "I have been," this indicates an action which took place over a period of time. This one, however, shows that the action finished a while ago. For example, imagine you are telling a story, and this conversation happens: A: I was really wet. B: Why were you so wet? A: I had been swimming. Your story takes place in the past, so you use the past tense. You finished swimming shortly before your story began, so you can say, "I had been swimming." I hope this helps you.