vs 

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"En" is a form of "en", a preposition which is often translated as "in". "En primera clase" is a phrase which is often translated as "in first class". Learn more about the difference between "en" and "en primera clase" below.
en(
ehn
)
A preposition is a word that indicates the relationship between a noun and another word (e.g., He ran through the door.).
preposition
a. in
Hay comida ya preparada en el supermercado.There's ready-made food in the supermarket.
b. on
Puedes poner los cubiertos en la mesa.You can put the silverware on the table.
c. at
Los niños están en la escuela.The kids are at school.
a. in
En 1969 aterrizamos en la luna.In 1969, we landed on the moon.
a. in
Si un oso te persigue, corre en zigzag.If a bear is chasing you, run in a zig-zag formation.
a. by
No vinimos en avión; vinimos en tren.We didn't come by plane. We came by train.
a. about
¿En qué piensas?What are you thinking about?
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en primera clase(
ehn
 
pree
-
meh
-
rah
 
klah
-
seh
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. in first class
Viajé en el mismo vuelo que el senador, pero él estaba en primera clase.I was in the same plane as the senator, but he was in first class.
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