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"Es" is a form of "ser", a copular verb which is often translated as "to be". "Por quien" is a phrase which is often translated as "for whom". Learn more about the difference between "es" and "por quien" below.
ser(
sehr
)A copular verb links the subject of a clause to the predicate (e.g., My brother is tall).
An intransitive verb is one that does not require a direct object (e.g., The man sneezed.).
a. to be made of
El casillero antiguo de mi abuela es de roble.My grandma's antique dresser is made of oak.
a. to root for
Yo soy del mejor equipo del mundo: FC Barcelona.I root for the best team in the world: FC Barcelona.
An impersonal verb is a verb with no apparent subject (e.g., Llueve en España.).
a. to be
Son las siete de la mañana.It is seven in the morning.
Era de noche cuando llegaron.It was night when they arrived.
An auxiliary verb, or helper verb, is a conjugated verb that comes before a main verb and determines the main verb's tense, mood, or aspect (e.g., I have gone.).
a. to be
El edificio fue diseñado por un equipo de arquitectos.The building was built by a team of architects.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
por quien(
pohr
kyehn
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. for whom
¿Quién es el escritor contemporáneo por quien sientes admiración?Who is the contemporary writer for whom you feel admiration?
b. through whom
Marcelo, por quien me enteré de que eres soltera, está enamorado de ti.Marcelo, through whom I found out you're single, is in love with you.
