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QUICK ANSWER
"Ellos" is a form of "ellos", a pronoun which is often translated as "they". "En" is a form of "en", a preposition which is often translated as "in". Learn more about the difference between "ellos" and "en" below.
ellos(
eh
-
yohs
)A pronoun is a word that stands in for a noun (e.g., she).
b. them (after prepositions)
Si confías en ellos, dales las llaves.If you trust them, give them the keys.
c. them (in comparisons)
Mi hermano y yo somos tan altos como ellos.My brother and I are as tall as them.
en(
ehn
)A preposition is a word that indicates the relationship between a noun and another word (e.g., He ran through the door.).
