Quantificadores Ingleses Categorizados - Artigos e quantificadores negativos

used when we want to talk about a person or thing for the first time or when other people may not know who or what they are

um, uma

used before a singular noun that starts with a vowel sound, when we are not talking about a specific person or thing

um, uma

used when referring to a person or thing that was previously mentioned or one that is identified easily

o, a

used to show that there is none or almost none of something

nenhum, não há

not any of the members of a group of people or things

nenhum, ninguém

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

qualquer, algum

used to indicate the absence or lack of something

zero, nenhum