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
Senão is a single connector or noun. Se não opens a negative condition.
A reliable test is to identify the job of the word before translating from English.
What each word does
senão
otherwise, except, or defect
Use senão for a consequence, exception, correction, or a noun meaning drawback.
se não
if not
Use se não for a conditional se followed by the negative não.
How to choose
- senão: Choose senão if the sentence points to a consequence, exception, correction, or a noun meaning drawback.
- se não: Choose se não if the sentence points to a conditional se followed by the negative não.
Examples
Apresse-se, senão perderá o trem.
Hurry, otherwise you will miss the train.
Se não chover, faremos o evento ao ar livre.
If it does not rain, we will hold the event outdoors.
Common trap
Try replacing the expression: caso não points to se não; do contrário or a não ser points to senão.
Practice it in context
Pick one sentence from your real life and write it twice: once with senão, then once with se não. 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.