1.What did you do last night?
What have you done last night?
2.I went to many countries in my life.
I have been to many countries in my life.
3.He went to Greece two years ago.
He has been to Greece two years ago.
4.I study English for three years.
I have studied / have been studying English for three years.
5.I have known Mary for three weeks.
I have known Mary since three weeks.
6.Where have you bought your shoes?
Where did you buy your shoes?
