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"A las nueve" is a phrase which is often translated as "at nine", and "cuarto" is an adjective which is often translated as "fourth". Learn more about the difference between "a las nueve" and "cuarto" below.
a las nueve(
ah
lahs
nweh
-
beh
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. at nine
La película empieza a las nueve. Hay que darse prisa o nos la perdemos.The film starts at nine. We'd better hurry or we'll miss it.
b. at nine o'clock
A las nueve sonaron las campanas de la iglesia.The church bells chimed at nine o'clock.
cuarto, el cuarto(
kwahr
-
toh
)An adjective is a word that describes a noun (e.g., the big dog).
a. fourth
Entra al edificio y toma el ascensor al cuarto piso.Enter the building and take the elevator to the fourth floor.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).