Nada disso vai acontecer, desde que a gente saia cedo.

In Brazilian Portuguese, ir + infinitive is a very common way to talk about the future:

• vai acontecer = is going to happen / will happen

The simple future acontecerá is correct too, but it can sound more formal, more written, or less conversational. In everyday speech, Brazilians usually prefer:

• vai acontecer
• vamos sair
• ele vai chegar

So in this sentence, vai acontecer sounds very natural and spoken.

Nada disso literally breaks down as:

• nada = nothing
• disso = of that / of it

Together, it means something like:

• none of that
• nothing of that
• nothing like that

In this sentence, it refers back to some previously mentioned bad events or possibilities. So Nada disso vai acontecer means None of that will happen.

Also, nada disso is a very common expression in Portuguese and can sometimes even mean No way! or Not at all! in other contexts, but here it simply refers to earlier-mentioned things.

Disso is a contraction:

• de + isso = disso

Since nada often connects naturally with de in expressions like nada disso, Portuguese uses the contracted form.

Compare:

• isso = that
• disso = of that / about that

So:

• Nada disso = None of that

This is just the normal idiomatic form. You would not usually say nada isso.

Yes, desde que can mean since, but in this sentence it means:

• provided that
• as long as
• on the condition that

So here:

• desde que a gente saia cedo = as long as we leave early

This is an important point: desde que has more than one meaning, and the verb form after it helps show the meaning.

When desde que means provided that / as long as, it is followed by the subjunctive.

Because desde que in the sense of provided that / as long as requires the subjunctive.

So the verb sair appears in the present subjunctive:

• eu saia
• você / ele / ela / a gente saia
• nós saiamos
• vocês / eles / elas saiam

That is why the sentence uses:

• desde que a gente saia cedo

and not:

• desde que a gente sai cedo

The form sai would be indicative, but this structure needs the subjunctive because it expresses a condition.

This is one of the most important everyday features of Brazilian Portuguese.

A gente literally comes from something like the people, but in modern Brazilian Portuguese it very often means:

• we

It is extremely common in spoken language and very natural.

Examples:

• A gente vai = We go / We’re going
• A gente saiu cedo = We left early

The key grammar point is that a gente takes a third-person singular verb, not a first-person plural one.

So:

• a gente sai
• a gente vai
• a gente saia

not:

• a gente saímos
• a gente vamos

Yes. You could say:

• Nada disso vai acontecer, desde que nós saiamos cedo.

That is grammatically correct.

But there are two differences:

1. Nós is less common than a gente in everyday Brazilian speech.
2. With nós, the verb changes to the first-person plural subjunctive:
   • a gente saia
   • nós saiamos

So both are correct, but a gente saia sounds more natural in casual Brazilian Portuguese.

Saia is the present subjunctive form of sair for:

• eu
• você
• ele / ela
• a gente

The verb sair is irregular, so its subjunctive forms are not built in the most obvious way if you are a beginner.

Present subjunctive of sair:

• que eu saia
• que você saia
• que ele saia
• que a gente saia
• que nós saiamos
• que vocês saiam
• que eles saiam

In this sentence, saia is used because the clause after desde que is conditional and requires the subjunctive.

Here, cedo is an adverb meaning:

• early

It modifies the verb saia:

• sair cedo = to leave early

Examples:

• Cheguei cedo. = I arrived early.
• A gente precisa sair cedo. = We need to leave early.

So in this sentence, cedo tells you when the group leaves.

The comma separates the main clause from the conditional clause:

• Nada disso vai acontecer
• desde que a gente saia cedo

This is very common and natural in Portuguese, especially when the second part adds a condition, explanation, or limitation.

You may also see the clauses reversed:

• Desde que a gente saia cedo, nada disso vai acontecer.

That version would also normally use a comma.

Because the subject of the verb is nada disso, and nada is grammatically singular.

So Portuguese treats it as singular:

• Nada disso vai acontecer.

Just like:

• Nada aconteceu.
• Nada mudou.

Even if nada disso refers to multiple possible events or problems, the grammatical subject is still singular.

It sounds mostly neutral to informal, especially because of a gente and vai acontecer.

Why:

• a gente is very common in spoken Brazilian Portuguese
• vai + infinitive is also very conversational and natural

A more formal version might be:

• Nada disso acontecerá, desde que saiamos cedo.

That version is more formal because it uses:

• simple future: acontecerá
• nós form implied in saiamos

But the original sentence is exactly the kind of Portuguese you are very likely to hear in Brazil.

Yes, depending on style and nuance. Some possible alternatives are:

• se = if
• contanto que = provided that
• desde que = as long as / provided that
• caso = in case / if

For example:

• Nada disso vai acontecer, se a gente sair cedo.
• Nada disso vai acontecer, contanto que a gente saia cedo.

But they are not always identical in tone:

• se is simpler and very common
• desde que and contanto que sound more explicitly conditional, like provided that

Also notice:

• after se, Portuguese usually uses the future subjunctive in this type of clause: se a gente sair cedo
• after desde que meaning provided that, it uses the present subjunctive: desde que a gente saia cedo

So you cannot always swap them without changing the verb form too.