doesn't know how to swim
She doesn't know how to swim.
Ella vive cerca de la playa, pero no sabe nadar.
She lives near the beach, but she doesn’t know how to swim.
He/She doesn't know how to swim very well.
¡Él no sabe nadar, se hundirá!
He can't swim; he'll drown!
¿Es verdad que Tom no sabe nadar?
Is it true that Tom can't swim?
Más de un amigo mío no sabe nadar.
More than one of my friends can't swim.
Estoy bastante seguro de que Tom no sabe nadar.
I'm pretty sure Tom can't swim.
Tom todavía no sabe nadar.
Tom still doesn't know how to swim.