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QUICK ANSWER
"I know how to swim" is a phrase which is often translated as "sé nadar", and "yes" is an interjection which is often translated as "sí". Learn more about the difference between "I know how to swim" and "yes" below.
I know how to swim(
ay
no
hau
duh
swihm
)yes(
yehs
)An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).