Pronomes e Determinantes - Pronomes e determinantes indefinidos não assertivos

an unspecified amount or selection of something, regardless of its quantity or magnitude

qualquer, nenhum

used for referring to a person when who that person is does not matter

qualquer pessoa, alguém

used to refer to a person, regardless of their identity, characteristics or specific attributes

qualquer um, ninguém

used for referring to a thing when it is not important what that thing is

qualquer coisa, algo

one or some of a thing or number of things, however large or small

qualquer, algum