YOU SAID:
I once saw this girl at a party
INTO JAPANESE
私はかつてこの女の子を党で見た
BACK INTO ENGLISH
I used to see this girl in a party
INTO JAPANESE
私はこの女の子をパーティーで見た
BACK INTO ENGLISH
I saw this girl at the party
INTO JAPANESE
私はパーティーでこの女の子を見た
BACK INTO ENGLISH
I saw this girl at the party
This is a real translation party!