Pronomes e Determinantes - Pronomes e determinantes assertivos indefinidos

used to denote a certain, but unspecified, portion or selection of things or people

alguns, algumas

a person who is not mentioned by name

alguém, uma pessoa

a person whose identity is not specified or known

alguém, uma pessoa

used to mention a thing that is not known or named

algo, uma coisa

used to express an unspecified amount or number of something

alguns, certos

used to refer to an unspecified selection within a group or category

certos, certas