knows how to swim
Il sait nager aussi rapidement que son frère.
He can swim as fast as his brother.
A fish can swim.
Aucun de mes frères ne sait nager.
None of my brothers know how to swim.
C'est toujours celui qui sait nager qui se noie.
It’s always the one who knows how to swim who drowns.
— Les Diaboliques (1955)
Il sait nager comme un poisson.
He can swim like a fish.
Croyez-vous vraiment que Tom sait nager ?
Do you really believe Tom can swim?
He can swim.
Est-ce que l'un d'entre vous sait nager ?
Does any of you know how to swim?
Marie sait nager.
Marie knows how to swim.