I've watched

I've watched you grow up, Indy.

Je t’ai vu grandir, Indy.

— Indiana Jones and the Last Crusade (1989)

I've watched them all day.

Je les ai regardés toute la journée.

— Harry Potter and the Philosopher's Stone (2001)

I've watched this movie several times.

J’ai regardé ce film plusieurs fois.

I've watched many French movies.

J’ai regardé beaucoup de films français.

I've watched you for days.

Je t'observe depuis des jours.

— Manon of the Spring (1986)

I've watched the two of you grow apart.

Je vous ai vus vous éloigner l’un de l’autre.

— Indiana Jones and the Last Crusade (1989)