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"Ella" is a pronoun which is often translated as "she", and "su" is an adjective which is often translated as "his". Learn more about the difference between "ella" and "su" below.
ella(
eh
-
yah
)
A pronoun is a word that stands in for a noun (e.g., she).
pronoun
a. she (subject)
Ella publicó un libro acerca de la epidemiología.She published a book about epidemiology.
b. her (object)
Voy a hablar con ella para ver si nos puede aconsejar.I'm going to talk to her and see if she can advise us.
c. it (things or animals)
Esa es mi casa. Detrás de ella hay un garaje.That's my house. Behind it, there's a garage.
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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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