~에 가본 적 있어? + 대답

■ 한국 가본 적 있어?

A : Have you ever been to korea ?
B :
-I have been one time but long time ago.
-I went last week
-Yes I have, several years ago, had a good time
back then

-No, unfortunately
-I’ve never been there but i know it

*several years 몇 년
*unfortunately (언폴튜널리) 아쉽게도, 불행하게도