YOU SAID:

Maybe I have been here before I know this room, I've walked this floor

INTO JAPANESE

この部屋を知る前にここにいたのかもしれない、私はこの階を歩いた

BACK INTO ENGLISH

Maybe I was here before I knew this room, I walked on this floor

INTO JAPANESE

たぶん私はこの部屋を知る前にここにいて、この階を歩いた

BACK INTO ENGLISH

Maybe I was here before I knew this room and walked up this floor

INTO JAPANESE

たぶん私はこの部屋を知る前にここにいて、この階を歩いた

BACK INTO ENGLISH

Maybe I was here before I knew this room and walked up this floor