The Plural of Nouns And Articles

silla --> sillas (chairs)

teclado --> teclados (keyboards)

libro--> libros (books)

cartel --> carteles (posters)

papel --> papeles (papers)

reloj --> relojes (clocks)

lápiz --> lápices (pencils)

vez --> veces (times, moments)

nariz --> narices (noses)

When you are referring to a SPECIFIC noun

In English, we say "the"

The boy (el chico), the female friend (la amiga), the desk (el escritorio), the school (la escuela)

When you are NOT referring to a specific noun

In English, we say "a" or "an" or "some"

A boy (un chico), a female friend (una amiga), a desk (un escritorio), a school (una escuela)