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Both "cuántos" and "cuantas" are forms of "cuanto", which is often translated as "as much as". Learn more about "cuanto" below.
cuanto(
kwahn
-
toh
)A pronoun is a word that stands in for a noun (e.g., she).
1. (everything)
a. as much as (uncountable)
En ese restaurante puedes comer todo cuanto quieras.In that restaurant you can eat as much as you want.
b. as many as (countable)
Puedes coger todo cuanto te puedas llevar.You can take as many as you can carry.
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
a. the more
Cuanto más tiene, más quiere.The more he gets, the more he wants.
Cuanto más trabaja, más rico se hace.The more he works, the richer he gets.
An adjective is a word that describes a noun (e.g., the big dog).
3. (everything)
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).