I have never ... them
Je ne les ai jamais vues rire.
I've never seen them laugh.
I have never seen them.
I've never seen them.
No, I've never seen them.
Je ne les ai jamais lues, alors je ne sais pas ce qu'elles contiennent.
I've never read them, so I don't know what they contain.
— Demon Slayer : Kimetsu no Yaiba - Le film : Le train de l'Infini (2020)
I've never seen them laugh.
I never saw them again.