Neruda is best known for his POEMS.
When you're talking about nonspecific things.
it's like (a) and (an) in english.
uno is for singular masculine.
una is for singular feminine.
unos is for plural masculine.
unas is for plural feminine.
yo - era
tú - eras
él/ella - era
nosotros - éramos
vosotros - erais
Ellos/Ellas - eran
I suggest using wordreference.com for any conjugating
Answer:
Don quijote es un personaje que Alonso Quijana le da vida y es interpretado por Cervantes. Es el caballero idealista y aventurero y representa la valentía y la caballerosidad, decidido a hacer lo que sea necesario para cortejar a su bella dama.
Explanation: