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"Previos" is a form of "previo", an adjective which is often translated as "prior". "Posteriores" is a form of "posterior", an adjective which is often translated as "rear". Learn more about the difference between "previos" and "posteriores" below.
previo, el previo(
preh
-
byoh
)An adjective is a word that describes a noun (e.g., the big dog).
1. (preceding)
a. prior
El ejercicio previo al examen fue muy difícil de resolver.The exercise prior to the exam was very hard to complete.
b. previous
La semana previa al viaje nos enteramos de que estaba embarazada.The week previous to the trip we found that I was pregnant.
c. preliminary
El artista no estaba nervioso en el ensayo previo antes del concierto.The artist wasn't nervous in the preliminary rehearsal before the concert.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
posterior(
pohs
-
teh
-
ryohr
)An adjective is a word that describes a noun (e.g., the big dog).
a. subsequent
No hubo ningún cambio durante los días posteriores.There was no change over the subsequent days.
b. later
El prólogo fue añadido a ediciones posteriores.The prologue was added to later publications.