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"Su" is an adjective which is often translated as "his", and "a ella" is a phrase which is often translated as "her". Learn more about the difference between "su" and "a ella" below.
su(
soo
)
An adjective is a word that describes a noun (e.g., the big dog).
adjective
a. his
A word or phrase that is masculine (e.g., el libro).
(masculine)
A word or phrase that is singular (e.g., el gato).
(singular)
¿Hiciste su tarea por él?Did you do his homework for him?
b. her
A word or phrase that is feminine (e.g., la manzana).
(feminine)
A word or phrase that is singular (e.g., el gato).
(singular)
¿Sabes dónde está el cargador de su teléfono?Do you know where the charger is for her phone?
c. its
A word or phrase that is singular (e.g., el gato).
(singular)
Esta es su perrera.This is its doghouse.
d. their
A word or phrase that is plural (e.g., los libros).
(plural)
Esa es su cena. No la comas.That is their dinner. Don't eat it.
2.
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
(formal)
(possessive; second person singular)
a. your
Nuestra casa es su casa.Our house is your house.
a. your
¿A qué hora vendrá a recogerlos su mamá?What time is your mom picking you up?
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a ella(
ah
 
eh
-
yah
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. her
Es a ella a quien debes pedirle permiso, no a mi.It's her you have to ask permission, not me.
b. to her
No tengo tu libro. Se lo di a ella.I haven't got your book. I gave it to her.
c.
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
no direct translation
A ella no le importa trabajar los domingos.She doesn't mind working on Sundays.
A ella le pareció bien ir al cine. No entiendo por qué se queja ahora.She thought it was OK to go to the movies. I can't see why she's complaining now.
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