Hi Danielle."Been there, done that" is an idiom.People say this when they have already experienced what is being discussed. For example if you are telling your friends that you have planned to travel to Paris, one of them who's already been there will say,"Been there, done that"

If you prefer : I went there and I did that...

Idiom Definitions for 'Been there, done that' - People say this when they have already experienced what is being discussed. http://www.usingenglish.com/reference/idioms/been+there,+done+that.html

I would add that the tone associated with the idiom "been there, done that" is negative. For instance, in the example given by Jura, the friend who had been to Paris already says, "Been there, done that", and the feeling is that it isn't so special, actually. It would make the person planning their trip feel badly. The other common variant in usage applies to the situation where one has gone through some unpleasant experience and does not intend to ever do it again. For example, if I've had a long distance relationship before and it was a bad experience (as they usually are :o ), I could say, "No more long distance relationships for me! Been there, done that."

已经做过了。 I have been there, and done that.