Certamente a empresa vai ajudar.

Because Portuguese usually uses a definite article before many nouns where English often does not.

• a empresa = the company
• empresa by itself can mean company in a more general or indefinite sense, depending on context

Here, a is the feminine singular definite article because empresa is a feminine singular noun.

So:

• a empresa = the company
• o livro = the book
• a casa = the house

This is very normal in Portuguese.

Empresa is a feminine noun, so it takes:

• a in the singular → a empresa
• as in the plural → as empresas

Many nouns ending in -a are feminine, and empresa follows that pattern. But remember: grammatical gender in Portuguese is not always predictable just from meaning, so it is best to learn nouns together with their article:

• a empresa
• o problema
• a cidade

That way, you automatically learn the correct gender.

Vai ajudar is a very common way to express the future in Brazilian Portuguese.

It is built with:

• vai = present tense of ir (to go)
• ajudar = infinitive (to help)

So the structure is:

ir + infinitive

This works like going to + verb in English, but in Portuguese it is often the most natural everyday way to talk about the future.

Examples:

• Vou ligar. = I’ll call / I’m going to call.
• Eles vão chegar cedo. = They’ll arrive early.
• A empresa vai ajudar. = The company will help.

Brazilian Portuguese often prefers this structure in speech over the simple future form.

Yes. A empresa ajudará is grammatically correct.

It uses the simple future:

• ajudará = will help

However, in Brazilian Portuguese:

• vai ajudar sounds more natural in everyday speech
• ajudará sounds a bit more formal, written, official, or emphatic

So both are correct, but they feel different in tone:

• A empresa vai ajudar. → common, natural, conversational
• A empresa ajudará. → more formal or institutional

Vai is the third person singular present tense of the verb ir (to go).

The verb ir is irregular:

• eu vou
• você/ele/ela vai
• nós vamos
• eles/elas vão

In A empresa vai ajudar, vai matches a empresa, which is a third person singular subject.

So literally, the structure is something like:

• the company goes to help

But in real Portuguese, it simply expresses future time:

• the company will help

Because a empresa is already the subject.

Portuguese does not need a separate pronoun if the noun is already stated.

So:

• A empresa vai ajudar. = The company will help.

If you said Ela vai ajudar, then ela would mean she/it, and the listener would need context to know that ela refers to a empresa.

You can use either, depending on context:

• A empresa vai ajudar.
• Ela vai ajudar. ← after empresa has already been mentioned

Certamente is an adverb. It adds the idea of strong certainty.

It is similar to:

• certainly
• definitely
• surely
  depending on context

So it tells you the speaker feels confident about what will happen.

In this sentence, it modifies the whole statement, not just one word. It means the speaker is saying that the event is very likely or assured.

Yes. Portuguese allows some flexibility with adverb placement.

These are all possible:

• Certamente a empresa vai ajudar.
• A empresa certamente vai ajudar.
• A empresa vai certamente ajudar.

In Brazilian Portuguese, the first two are the most natural.

There can be slight differences in rhythm or emphasis:

• Certamente a empresa vai ajudar. → emphasizes certainty right from the start
• A empresa certamente vai ajudar. → starts with the subject, then adds certainty

All of them are understandable, but some placements may sound more natural than others depending on style and context.

A useful approximate pronunciation is:

ser-tcha-MEN-tchee or ser-ta-MEN-ti, depending on accent and speaking style

A few notes:

• the stress is on men: certaMENte
• in many Brazilian accents, unstressed e at the end sounds like ee
• the te at the end may sound like chee in many regions, especially before i/e sounds

A rough IPA version is often given as: /seʁtaˈmẽtʃi/ or similar, depending on accent

You do not need to pronounce it exactly the same way in every region, but stressing -men- correctly is important.

In connected speech, a empresa often sounds smoother than the spelling suggests.

A rough Brazilian pronunciation is:

ah em-PREH-zah

But in natural speech, the two words link together, and you may hear something close to:

aem-PREH-zah

Useful notes:

• stress is on pre: emPREsa
• the initial em is nasal
• the final a is usually light and unstressed

Listening practice is especially helpful here, because nasal sounds are hard to learn from spelling alone.

A common Brazilian pronunciation is roughly:

ah-zhoo-DAR

Key points:

• stress is on the last syllable: ajuDAR
• the j in Portuguese sounds like the s in measure or the zh sound
• the final r in Brazilian Portuguese is often pronounced softly, sometimes like an English h sound depending on the accent

So the ending may sound something like:

• -dar
• -dah
• -dahr

depending on region and style.

It is neutral and natural.

• a empresa vai ajudar is common in everyday Brazilian Portuguese
• certamente makes it sound a bit more confident and slightly more formal than something like com certeza in some contexts

So the sentence is not overly formal, but it does sound a little polished because of certamente.

If you wanted a more conversational tone, you might hear:

• Com certeza a empresa vai ajudar.

Both are correct, but certamente can sound a bit more written or careful.

Yes, very often.

You could say:

• Certamente a empresa vai ajudar.
• Com certeza a empresa vai ajudar.

Both express certainty, but there can be a small difference in feel:

• certamente → often a bit more formal, polished, or written
• com certeza → very common in spoken Brazilian Portuguese

In many situations, com certeza sounds more conversational.

In this structure, yes: ir + infinitive usually expresses a future action.

Examples:

• Vou estudar. = I’m going to study / I will study.
• Ela vai sair. = She is going to leave / She will leave.
• A empresa vai ajudar. = The company will help.

Even though vai is grammatically present tense, the whole expression points to the future.

That is a very important pattern in Portuguese, especially in Brazil.