I saw them
I saw them last night.
Li ho visti soltanto due volte.
I’ve only seen them twice.
I saw them at the restaurant.
Li ho visti bruciare libri in piazza.
I saw them burning books in the square.
— L'infanzia di Ivan (1962)
Io li ho visti fumare delle sigarette.
I saw them smoking cigarettes.
I've seen them before.
I saw them on the stairs.
I saw them go in.