Breakdown of Se o elevador não funcionar, vou subir as escadas.
Questions & Answers about Se o elevador não funcionar, vou subir as escadas.
Because after se meaning if, Portuguese often uses the future subjunctive when talking about a possible future situation.
So:
- Se o elevador não funcionar... = If the elevator doesn’t work / if the elevator happens not to work...
This is different from English, where we usually use the present form after if.
Compare:
- Se ele vem is generally not correct for this kind of future condition.
- Se ele vier = If he comes
- Se o elevador não funcionar = If the elevator doesn’t work
For regular -ar verbs, the future subjunctive often looks the same as the infinitive, which is why you see funcionar.
Vou subir is the very common ir + infinitive future, literally I am going to go up, but in natural English it usually just means I’ll go up.
So:
- vou subir = I’m going to go up / I’ll go up
Portuguese also has a simple future:
- subirei = I will go up
Both are correct, but in everyday Brazilian Portuguese, vou subir is usually more natural and more common in speech.