he knows that
He knows that you know.
Él sabe que soy un gran boxeador.
He knows I'm a great boxer.
Él sabe que alguien lo observaba.
He knows that someone was watching him.
— Moonrise Kingdom: Amor Infantil (2012)
Ahora él sabe que la criada lo sabe, y por eso desconfía.
Now he knows that the maid knows, and that's why he's suspicious.
— Divorzio all'italiana (1961)
Él sabe que no me gustan los encuentros cara a cara.
He knows I don't like face-to-face meetings.