Turn this distinction into automatic recall
Falando teaches Brazilian Portuguese through grammar, vocabulary, audio, examples, and spaced review, so confusing pairs stop feeling like guesses.
Quick answer
Algum leaves the choice open. Nenhum closes it: not one.
A reliable test is to identify the job of the word before translating from English.
What each word does
algum
some or any
Use algum for an unspecified person or thing, often in questions.
nenhum
no or not any
Use nenhum for the absence of even one person or thing.
How to choose
- algum: Choose algum if the sentence points to an unspecified person or thing, often in questions.
- nenhum: Choose nenhum if the sentence points to the absence of even one person or thing.
Examples
Você tem algum irmão?
Do you have any brothers?
Não tenho nenhum irmão.
I do not have any brothers.
Common trap
After a negative verb, nenhum is natural in Brazilian Portuguese. The double negative reinforces one negative meaning.
Practice it in context
Pick one sentence from your real life and write it twice: once with algum, then once with nenhum. If both versions feel possible, name the meaning shift.
Turn this distinction into automatic recall
Falando teaches Brazilian Portuguese through grammar, vocabulary, audio, examples, and spaced review, so confusing pairs stop feeling like guesses.