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
Mau describes a noun. Mal describes an action, state, or result.
A reliable test is to identify the job of the word before translating from English.
What each word does
mau
bad
Use mau for a bad quality of a noun, opposite of bom.
mal
badly or not well
Use mal for the way an action happens, opposite of bem.
How to choose
- mau: Choose mau if the sentence points to a bad quality of a noun, opposite of bom.
- mal: Choose mal if the sentence points to the way an action happens, opposite of bem.
Examples
Ele teve um mau dia.
He had a bad day.
Dormimos mal ontem.
We slept badly yesterday.
Common trap
Use the opposite test: if bom fits, use mau. If bem fits, use mal.
Practice it in context
Pick one sentence from your real life and write it twice: once with mau, then once with mal. 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.