I've seen it
Estoy seguro de que lo he visto antes en alguna parte.
I'm sure I've seen it somewhere before.
Ya lo he visto millones de veces.
I've seen it millions of times already.
Carlos, que lo he visto con mis propios ojos.
Carlos, I've seen it with my own eyes.
— El orfanato (2007)
I have seen it.
I've seen it somewhere.
I saw it on the news.
I've seen it around.
I've seen it a couple of times.