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"Ellos" is a form of "ellos", a pronoun which is often translated as "they". "Tu" is a form of "tu", an adjective which is often translated as "your". Learn more about the difference between "ellos" and "tu" 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.
tu(
too
)An adjective is a word that describes a noun (e.g., the big dog).
1. (informal) (possessive)
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).