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"Estos" is a form of "estos", a pronoun which is often translated as "these". "Ellos" is a form of "ellos", a pronoun which is often translated as "they". Learn more about the difference between "estos" and "ellos" below.
estos(
ehs
-
tohs
)A pronoun is a word that stands in for a noun (e.g., she).
a. these
¿Cuáles libros te quieres llevar? - Quiero estos.Which books do you want to take? - I want these.
b. these ones
Los zapatos de esta tienda son increíbles. - Ya sé; me encantan estos.The shoes in this shop are amazing. - I know; I love these ones.
2. (colloquial) (demonstrative)
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
a. they
Todos fuimos a nadar, excepto Pablo y Agustín. Estos se quedaron a cuidar nuestras pertenencias.We all went swimming, except Pablo and Agustin. They stayed to look after our stuff.
An adjective is a word that describes a noun (e.g., the big dog).
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.