YOU SAID:

youve been here before havent you

INTO JAPANESE

あなたはあなたがいない前にここにいました

BACK INTO ENGLISH

you were here before you were gone

INTO JAPANESE

あなたがいなくなる前にあなたはここにいた

BACK INTO ENGLISH

you were here before you left

INTO JAPANESE

あなたは去る前にここにいた

BACK INTO ENGLISH

you were here before you left