Se a câmera não funcionar, vou usar o celular e silenciar o microfone do computador.

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Breakdown of Se a câmera não funcionar, vou usar o celular e silenciar o microfone do computador.

• e: and
• o computador: the computer
• ir: to go (future auxiliary)

Questions & Answers about Se a câmera não funcionar, vou usar o celular e silenciar o microfone do computador.

Why is funcionar used after se instead of funciona?

Because after se when Portuguese refers to a possible future situation, it normally uses the future subjunctive. So Se a câmera não funcionar... is the natural way to say if the camera doesn’t work / if the camera should fail.

If you use funciona instead, it sounds more like a general fact or habitual situation, not this specific future possibility.

How can I tell that funcionar here is the future subjunctive if it looks exactly like the infinitive?

You tell by the context and the grammar pattern.

After words like se, quando, and assim que, Portuguese often uses the future subjunctive when talking about future events. With many regular -ar verbs, the future subjunctive looks exactly like the infinitive, so funcionar can be either form depending on context.

For comparison, with other verbs the form changes more clearly:

• se for = if it goes / if it is
• se tiver = if it has
• se puder = if it can

So in this sentence, funcionar is not just a dictionary form floating by itself; it is functioning as the future subjunctive.

Why does the sentence use vou usar instead of usarei?