vs
QUICK ANSWER
"Ayer" is an adverb which is often translated as "yesterday", and "en la fiesta" is a phrase which is often translated as "at the party". Learn more about the difference between "ayer" and "en la fiesta" below.
ayer(
ah
-
yehr
)An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
2. (literary) (recent past)
A word or phrase restricted in usage to literature or established writing (e.g., sex, once upon a time).
a. yesteryear (literary)
A word or phrase restricted in usage to literature or established writing (e.g., sex, once upon a time).
La vida simple del ayer que echamos tanto de menos.The simple life of yesteryear that we miss so much.
en la fiesta(
ehn
lah
fyehs
-
tah
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. at the party
Bailé mucho en la fiesta, la música era genial.I danced a lot at the party. The music was great.