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"Ellos" is a form of "ellos", a pronoun which is often translated as "they". "Preferir" is a transitive verb which is often translated as "to prefer". Learn more about the difference between "ellos" and "preferir" below.
ellos()
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.
preferir()
A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
b. no direct translation
The following examples show ways to translate this word or phrase without using a direct equivalent.
Prefiero que se lo digas tú porque a ti te hace más caso.I'd rather you told him because he listens to you more.
¿No preferirías ir de vacaciones al extranjero este año?Wouldn't you rather vacation abroad this year?