French phrase
Je suis déjà venu dans ~.
Meaning
I've already been to ___.
When to use it
Says that the speaker has visited a place before. It is common in travel conversations and sounds neutral.
Example dialogue
Je suis déjà venu dans cette ville.
I've already been to this town.
Ah bon ? Quand es-tu venu ?
Oh, really? When did you come?