за мной следят

they are watching me

→ за
phrase Rare #25,612
they are watching me Used to say that someone is watching, following, or monitoring the speaker. The person being watched is expressed with за plus the instrumental form: мной.
RU: Мне кажется, что за мной следят.
EN: I feel like someone is watching me.

За мной следят!

I'm being followed!

— Не говори никому (2006)

Я знаю, что за мной следят.

I know I'm being followed.

За мной следят.

I'm being followed.

Я понял, что за мной следят.

I realized that I was being followed.