QUICK ANSWER
"Why" is a form of "why", an adverb which is often translated as "por qué". "Why not" is a form of "why not", a phrase which is often translated as "por qué no". Learn more about the difference between "why" and "why not" below.
why(
way
)An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g., The cat and the dog slept.).
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
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?
