Have a look at this link about GONE TO / BEEN TO, write down new examples in your notebook and explain it to the teacher and your partners tomorrow. Enjoy yourself!!
http://www.bbc.co.uk/worldservice/learningenglish/grammar/learnit/learnitv76.shtml
and more to practice!!
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-9892.php
