QUICK ANSWER
"Why not" is a form of "why not", a phrase which is often translated as "por qué no". "Yes" is an interjection which is often translated as "sí". Learn more about the difference between "yes" and "why not" below.
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).
why not(
way
nat
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. por qué no
Why are you studying on a Friday night? Why not do something fun?¿Por qué estás estudiando el viernes por la noche? ¿Por qué no haces algo divertido?
