QUICK ANSWER
"Quién es" is a form of "quién es", a phrase which is often translated as "who is". "Bueno" is an adjective which is often translated as "good". Learn more about the difference between "bueno" and "quién es" below.
bueno(
bweh
-
noh
)An adjective is a word that describes a noun (e.g., the big dog).
1. (beneficial)
a. good
La dieta mediterránea es muy buena para la salud.The Mediterranean diet is very good for your health.
2. (useful)
4. (virtuous)
a. good
Un buen hombre dio su vida por la comunidad anoche.A good man gave his life in the service of this community last night.
5. (delicious)
6. (colloquial) (attractive)
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
a. ok
Creo que sería mejor ir al restaurante francés. - Bueno, vayamos.I think it'd be better to go to the French restaurant. - Ok, let's go.
quién es(
kyehn
ehs
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. who is
Pronto sabremos quién es el ganador del concurso.We will soon know who the winner of the contest is.
c. who he is (masculine)
Juan sufrió un golpe a la cabeza y ya no sabe quién es.John suffered a blow to the head and no longer knows who he is.
d. who she is (feminine)
¿Ves a la señorita del vestido rojo? Quiero saber quién es.Do you see the young woman in the red dress? I want to know who she is.
d. who is he (masculine)
¡No es mi novio! - Entonces, ¿quién es?He isn't my boyfriend. - So, who is he then?
e. who is she (feminine)
¿Ves a esa muchacha que nos está mirando? - Sí, ¿quién es?Do you see that girl watching us? - Yes, who is she?
3. (formal) (second person singular; in questions)
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
