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"Her" is an adjective which is often translated as "su", and "what is" is a phrase which is often translated as "qué es". Learn more about the difference between "her" and "what is" below.
her(
huhr
)
An adjective is a word that describes a noun (e.g., the big dog).
adjective
a. su
Her children are very bright.Sus hijos son muy inteligentes.
I cannot stand her attitude any longer.Ya no puedo soportar más su actitud.
A pronoun is a word that stands in for a noun (e.g., she).
pronoun
a. ella (emphatic use)
Please, explain it to her.Por favor, explícaselo a ella.
b. la (direct object)
I love her, but she loves someone else.La amo, pero ella ama a otro.
c. le (indirect object)
Give her all the money she needs!¡Dale todo el dinero que necesite!
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what is(
wuht
 
ihz
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. qué es
What is that nasty smell?¿Qué es ese olor repugnante?
b. cuál es
What is your favorite color?¿Cuál es tu color favorito?
a. cuánto es
What is 3 x 12? - 36.¿Cuánto es 3 x 12? - 36.
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