you've already seen
Have you ever seen anything like this before?
T'as déjà vu Nana ailleurs qu'au gym ?
Have you ever seen Nana anywhere other than at the gym?
T'as déjà vu quelqu'un avec un cafard dans les cheveux ?
Have you ever seen someone with a cockroach in their hair?
— King of Comedy (1999)
T'as déjà vu un bébé faire ça ?
Have you ever seen a baby do that?