наблюдал за

watched

→ наблюдать
phrase Common #10,024
watched Used with за and a noun or pronoun in the instrumental case to say what someone watched or observed. наблюдал is the masculine past-tense form.
RU: Он долго наблюдал за птицами.
EN: He watched the birds for a long time.

Том наблюдал за белками.

Tom watched the squirrels.

Том с тревогой наблюдал за Мэри.

Tom watched Mary with concern.

Том пристально наблюдал за Мэри.

Tom watched Mary closely.