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"Es la una" is a phrase which is often translated as "it's one o'clock", and "doce" is an adjective which is often translated as "twelve". Learn more about the difference between "es la una" and "doce" below.
es la una(
ehs
 
lah
 
oo
-
nah
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. it's one o'clock
Es la una de la mañana. ¡Ya duérmete!It's one o'clock in the morning. Go to sleep!
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doce(
doh
-
seh
)
An adjective is a word that describes a noun (e.g., the big dog).
adjective
a. twelve
Necesito mínimo doce horas de sueño.I need a minimum of twelve hours of sleep.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
masculine noun
a. twelve
El doce es un número par.Twelve is an even number.
b. twelfth (in dates)
Recuerden que el examen final es el doce de mayo.Remember that the final exam is on the twelfth of May.
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