Eu vou terminar o relatório ainda hoje.

Vou terminar is a very common way to talk about the future in Brazilian Portuguese. It is the structure:

ir + infinitive
→ vou terminar = I am going to finish / I will finish

In everyday speech, Brazilians often prefer this structure over the simple future terminarei.

• Eu vou terminar o relatório ainda hoje. → very natural in conversation
• Eu terminarei o relatório ainda hoje. → correct, but often sounds more formal, written, or emphatic

So if you are learning natural spoken Brazilian Portuguese, vou + infinitive is extremely important.

Yes. In Brazilian Portuguese, subject pronouns are often optional, and this sentence works perfectly without eu:

• Vou terminar o relatório ainda hoje.

Including eu can add:

• emphasis
• clarity
• contrast

For example:

• Eu vou terminar o relatório ainda hoje, mas ele não vai.

So both are correct:

• Eu vou terminar o relatório ainda hoje.
• Vou terminar o relatório ainda hoje.

Vou terminar has two parts:

• vou = I go / I am going from the verb ir
• terminar = infinitive, to finish

Together, they form a future idea:

• eu vou terminar = I’m going to finish / I will finish

This pattern is very common:

• vou estudar = I’m going to study
• vou sair = I’m going to leave
• vou ligar = I’m going to call

So the formula is:

subject + present tense of ir + infinitive

Portuguese uses definite articles much more often than English.

So where English may say:

• finish the report

Portuguese naturally says:

• terminar o relatório

The article o means the and matches relatório, which is masculine singular.

This is very normal in Portuguese. In many contexts, leaving out the article would sound incomplete or unnatural.

Because it takes the masculine singular article o:

• o relatório

In Portuguese, nouns have grammatical gender. Here:

• o = masculine singular
• relatório = masculine noun

Its plural would be:

• os relatórios

The ending -o often suggests masculine, but not always. The safest way is to learn nouns together with their article:

• o relatório
• a reunião
• o problema
• a análise

Ainda hoje means something like:

• still today
• later today
• before today ends
• as early as today, depending on context

In this sentence, it gives the idea that the action will happen within the rest of today.

So it is not just a neutral today. It adds a sense like:

• today, before the day is over
• even today
• by later today

That is why ainda hoje feels slightly stronger than just hoje.

The difference is nuance.

• hoje = today
• ainda hoje = still today / later today / before the day ends

Compare:

• Vou terminar o relatório hoje.
  → I’ll finish the report today.

• Vou terminar o relatório ainda hoje.
  → I’ll finish the report today, before today is over.

Ainda often adds the idea of still, yet, or even depending on context. Here it emphasizes that it will happen within today, possibly sooner than expected.

Putting ainda hoje at the end is very natural because it adds the time information after the main action:

• Eu vou terminar o relatório ainda hoje.

This is a common word order in Portuguese:

• subject
• verb phrase
• object
• time expression

However, Portuguese is flexible, and you may also hear:

• Ainda hoje eu vou terminar o relatório.
• Eu ainda vou terminar o relatório hoje.

These alternatives can change the emphasis a little. The original sentence is neutral and very natural.

Yes. That is correct and natural.

Starting with ainda hoje gives more emphasis to the time:

• Ainda hoje vou terminar o relatório.

It can sound a bit like:

• I’ll finish the report today, before the day ends
• I’m finishing the report later today

So the difference is mostly emphasis, not basic meaning.

Yes, other verbs are possible, but they have slightly different tones.

• terminar o relatório → the most neutral and common
• finalizar o relatório → a bit more formal or professional
• acabar o relatório → possible, but often sounds a bit more colloquial; in some contexts acabar de has a different meaning, so learners should be careful

For most everyday situations, terminar is the safest and most natural choice.

Relatório is pronounced with the stress on tó:

re-la-TÓ-rio

The accent mark in ó shows the stressed syllable and also the open vowel sound.

Without the accent, the stress rules of Portuguese would suggest a different pronunciation, so the accent is necessary.

A rough English-friendly guide:

• heh-lah-TOH-ree-oh
  But it is better to listen to native pronunciation, because Portuguese vowels do not match English perfectly.

It is neutral and natural. It works well in both speech and writing.

• In conversation, it sounds completely normal.
• In a work context, it is also appropriate.
• It is not overly formal, and it is not slangy.

If you wanted something more formal, you might choose:

• Terminarei o relatório ainda hoje.
• Finalizarei o relatório ainda hoje.

But for everyday Brazilian Portuguese, the original sentence is excellent.

Yes, it often can.

Because vou terminar states a future action confidently, the sentence may sound like:

• a plan
• a commitment
• a reassurance
• a promise, depending on context

For example, if someone is waiting for the report, saying:

• Eu vou terminar o relatório ainda hoje.

can imply:

• Don’t worry, I’ll get it done today.

So the exact force depends on tone and situation, but it often sounds more definite than a vague future idea.