vs 

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"Niña" is a form of "niña", a noun which is often translated as "girl". "Qué pasó" is a form of "qué pasó", a phrase which is often translated as "what happened". Learn more about the difference between "niña" and "qué pasó" below.
la niña(
nee
-
nyah
)
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
feminine noun
a. girl
¡Mi hija es una niña tan bonita!My daughter is such a beautiful girl!
a. pupil
Tenía que llevar gafas de sol con las niñas dilatadas.He had to wear sunglasses while his pupils were dilated.
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qué pasó(
keh
 
pah
-
soh
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. what happened
¿Y? ¡Cuéntame! ¡Muero por saber qué pasó!So? Tell me! I'm anxious to hear what happened!
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