Se eu conseguir terminar o relatório hoje, vou caminhar na praça com minha tia.

Because after se when you are talking about a possible future condition, Portuguese normally uses the future subjunctive.

• Se eu conseguir terminar o relatório hoje... = If I manage to finish the report today...

Here, the speaker does not know yet whether they will finish it, so Portuguese uses conseguir in the future subjunctive: eu conseguir.

Compare:

• Se eu conseguir... = if I manage to...
• Se eu consigo... = if I am able to / if I usually manage to...
  This sounds more like a general or present-time idea, not this specific future situation.

So in this sentence, conseguir is correct because the condition is about the future.

It is the future subjunctive.

For the verb conseguir, the future subjunctive forms are:

• se eu conseguir
• se você/ele/ela conseguir
• se nós conseguirmos
• se vocês/eles/elas conseguirem

This tense is very common in Portuguese after words like:

• se = if
• quando = when
• assim que = as soon as
• logo que = as soon as

when they refer to the future.

Both are possible, but vou caminhar is much more common in everyday Brazilian Portuguese.

• vou caminhar = I’m going to walk
• caminharei = I will walk

In practice:

• vou + infinitive sounds more natural and conversational
• the simple future (caminharei) is more formal, literary, or less common in speech

So:

• Se eu conseguir terminar o relatório hoje, vou caminhar...
  sounds very natural in Brazil.

Yes, that is grammatically correct.

It means the same thing, but the tone changes:

• vou caminhar = more natural, spoken, everyday
• caminharei = more formal, more written, sometimes more emphatic

A Brazilian speaker would usually prefer vou caminhar in normal conversation.

Because na is the contraction of:

• em + a = na

The noun praça is feminine, so when you say in the square/plaza, you usually say:

• na praça

Examples:

• Estou na praça. = I am in the square.
• Vamos nos encontrar na praça. = We’re going to meet in the square.

Em praça by itself is not the normal way to say this in everyday speech.

In Brazilian Portuguese, both are possible:

• com minha tia
• com a minha tia

Both mean with my aunt.

In Brazil, possessives like meu/minha/seu/sua can appear:

• with an article: a minha tia
• without an article: minha tia

Usage varies by region, style, and speaker. In many cases, dropping the article sounds perfectly natural.

So this sentence is completely normal as written:

• com minha tia

And this would also be correct:

• com a minha tia

Not exactly. Conseguir means something like:

• to manage to
• to succeed in
• to be able to

So:

• terminar o relatório = to finish the report
• conseguir terminar o relatório = to manage to finish the report

The sentence suggests that finishing the report may be difficult or uncertain.

Compare:

• Se eu terminar o relatório hoje... = If I finish the report today...
• Se eu conseguir terminar o relatório hoje... = If I manage to finish the report today...

The second version adds the idea of difficulty or effort.

Portuguese often uses the definite article where English might not emphasize it as much.

• o relatório = the report

In this sentence, it refers to a specific report that both the speaker and listener can identify, or that is already understood from context.

Saying:

• terminar o relatório

is the most natural way to say finish the report.

If you said just terminar relatório, it would usually sound unnatural here.

The comma separates the conditional clause from the main clause.

• Se eu conseguir terminar o relatório hoje = conditional part
• vou caminhar na praça com minha tia = main result

So the comma helps show:

• If X happens, then Y happens.

This is standard and very common in writing.

Yes. You can also say:

• Vou caminhar na praça com minha tia se eu conseguir terminar o relatório hoje.

This is also correct and natural.

The meaning stays the same. The difference is mostly emphasis:

• starting with Se eu conseguir... emphasizes the condition
• starting with Vou caminhar... emphasizes the planned action

Yes, you could use andar, but the nuance can be a little different.

• caminhar = to walk, often a bit more deliberate or exercise-like
• andar = to walk / to go around / to move about, broader and very common

So:

• vou caminhar na praça sounds like going for a walk, possibly for exercise or leisure
• vou andar na praça is possible, but caminhar sounds a bit more natural in this kind of sentence

If the idea is go for a walk in the square, caminhar is a very good choice.

A natural approximate pronunciation would be:

Se eu conseguir terminar o relatório hoje, vou caminhar na praça com minha tia.

Roughly: seh ew kohn-seh-GEER tehr-mee-NAR oo heh-lah-TOH-ree-oh OH-zhee, voh kah-mee-NYAR nah PRAH-sah kohm MEE-nyah TEE-ah

A few useful pronunciation notes:

• relatório has stress on tó: re-la-TÓ-rio
• hoje in Brazil sounds like OH-zhee
• caminhar has the nh sound, like ny in canyon
• praça has ç, which sounds like s

You can translate it as either one, depending on the context.

In Portuguese, vou + infinitive often corresponds to both:

• I’m going to walk
• I will walk

English often distinguishes these more clearly, but Portuguese does not always.

So in this sentence:

• vou caminhar na praça com minha tia

could naturally be translated as:

• I’m going to walk in the square with my aunt
• I’ll walk in the square with my aunt

The exact English choice depends on style, not on a big difference in Portuguese meaning.