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"Cuarto" is an adjective which is often translated as "fourth", and "a las cinco" is a phrase which is often translated as "at five". Learn more about the difference between "cuarto" and "a las cinco" below.
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).
a las cinco(
ah
lahs
seeng
-
koh
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. at five
¿A qué hora sale el próximo tren para Boston? - El próximo a Boston sale a las cinco.What time does the next train to Boston leave? - The next Boston train leaves at five.
b. at five o'clock
¿Es verdad que los ingleses toman siempre el té a las cinco?Is it true that English people always have tea at five o'clock?