Question

Как написать по английски он умеет плавать

Answer 1

He can swim. Can переводится как может и умеет тоже.

Answer 2

He can swim. I think it's right!

Answer 3

To say "He knows how to swim" in English, you can use the following sentence:

"He is able to swim" or "He can swim."

Alternatively, you can use the phrase "He is a good swimmer" to indicate that he has skill and proficiency in swimming.