had seen it
Pero desde el accidente, no lo había visto nuevamente.
But since the accident, I hadn't seen him again.
— La cinta blanca (2009)
I've never seen him in my life.
I had never seen it before.
— La leyenda del pianista en el océano (1998)
Yo le he preguntado si lo había visto y dónde.
I asked him if he had seen it and where.
— Las diabólicas (1955)
I've seen it before.
Como ya lo había visto antes, lo reconocí inmediatamente.
Since I had seen him before, I recognized him immediately.