ты не умеешь плавать

you can't swim; you don't know how to swim

→ ты
phrase Rare #49,259
you can't swim; you don't know how to swim Refers to not knowing how to swim, rather than being unable to swim at a particular moment. The phrase uses the informal singular form of “you.”
RU: Ничего страшного, если ты не умеешь плавать.
EN: It’s okay if you can’t swim.

Если ты не умеешь плавать, я прекрасно плаваю.

If you can't swim, I can swim perfectly well.

— Пиноккио (2019)