have seen them
No los he visto desde el entierro de padre.
I haven't seen them since Father's funeral.
— Un asunto de familia (2018)
Es el número de veces que los he visto.
It's the number of times I've seen them.
I saw them today.
I've seen them too.
Yes, I have seen them.
No los he visto recientemente.
I haven't seen them recently.
I have seen them.