I’ve

I have been studying English for 3 years.
I have been to Shikoku
I have heard him sing
I have heard him sing before
I’ve seen that movie
I’ve seen the famous TV drama since last month.

I've drank many alcohol from last night
I’ve red a books from last night.
I’ve just responded his mail.
I’ve just  written the letter for my friend.
I’ve just dropped the train