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QUICK ANSWER
"Qué es" is a form of "qué es", a phrase which is often translated as "what is". "Que sea" is a phrase which is often translated as "he is". Learn more about the difference between "que sea" and "qué es" below.
que sea(
keh
seh
-
ah
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. he is (masculine)
Por muy bueno que sea, Arturo no me parece la pareja adecuada para Miranda.However nice he is, I don't think Arturo is the right partner for Miranda.
b. she is (feminine)
Por muy guapa que sea, a mí Fernanda no me acaba de gustar.However beautiful she is, I don't particularly like Fernanda.
d. it is
Por muy eficaz que sea, jamás pagaría ese precio.However efficient it is, I'd never pay that price.
e. that is (used to refer to a thing)
Busco una casa que sea grande y luminosa.I'm looking for a house that is big and bright.
a. I am
Por tonta que sea, soy consciente de cómo me tratan.However stupid I am, I'm aware of how they treat me.
3. (formal) (subjunctive; second person singular)
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
a. you are
Por lo rico que sea, jamás me casaría con usted.However rich you are, I would never marry you.
qué es(
keh
ehs
)A phrase is a group of words commonly used together (e.g., once upon a time).
b. what is it
Me gusta cómo huele lo que estás cocinando. ¿Qué es?I like the smell of what you're cooking. What is it?
