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"En" is a form of "en", a preposition which is often translated as "in". "Su" is an adjective which is often translated as "his". Learn more about the difference between "en" and "su" below.
en(
ehn
)A preposition is a word that indicates the relationship between a noun and another word (e.g., He ran through the door.).
su(
soo
)An adjective is a word that describes a noun (e.g., the big dog).
a. his (masculine) (singular)
A word or phrase that is masculine (e.g., el libro).
A word or phrase that is singular (e.g., el gato).
¿Hiciste su tarea por él?Did you do his homework for him?
b. her (feminine) (singular)
A word or phrase that is feminine (e.g., la manzana).
A word or phrase that is singular (e.g., el gato).
¿Sabes dónde está el cargador de su teléfono?Do you know where the charger is for her phone?
c. its (singular)
A word or phrase that is singular (e.g., el gato).
Esta es su perrera.This is its doghouse.
2. (formal) (possessive; 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).