Depois de destacar o melhor argumento, vou sublinhar a frase final e revisar a ortografia.

Because depois de is a fixed pattern in Portuguese when it is followed by a verb in the infinitive.

The structure is:

depois de + infinitive

So:

depois de destacar = after highlighting / after pointing out

This is very similar to English after + -ing.

• Depois de destacar o melhor argumento...
• After highlighting the best argument...

Depois destacar would sound incomplete here.

Yes. Depois que eu destacar is also correct.

There is a small difference in structure:

• depois de destacar = more compact, often used when the subject is the same as in the main clause
• depois que eu destacar = uses a full clause with a conjugated verb

So both can work:

• Depois de destacar o melhor argumento, vou...
• Depois que eu destacar o melhor argumento, vou...

The version with the infinitive is shorter and very natural here.

Because Depois de destacar o melhor argumento is an introductory time phrase, and Portuguese commonly separates that kind of opening element with a comma.

So the comma helps show the pause:

Depois de destacar o melhor argumento, vou sublinhar...

It is similar to English punctuation in sentences like:

After choosing the best argument, I’m going to underline...

Portuguese often drops subject pronouns when the verb already makes the subject clear.

Here, vou clearly means I am going to, so eu is not necessary.

• vou = I am going
• eu vou = also correct, but more explicit

You might include eu for emphasis, contrast, or clarity:

• Eu vou sublinhar, mas você vai revisar.

In a normal sentence like this, leaving out eu sounds natural.

In Brazilian Portuguese, ir + infinitive is extremely common for talking about the future.

So:

• vou sublinhar = very common, natural, neutral
• sublinharei = correct, but more formal or literary

The same idea applies to revisar:

• vou revisar
• revisarei

In everyday Brazilian Portuguese, the vou + infinitive form is usually the more natural choice.

Because one auxiliary verb can apply to more than one infinitive.

So:

vou sublinhar a frase final e revisar a ortografia

means the same as:

vou sublinhar a frase final e vou revisar a ortografia

Portuguese often omits the repeated vou when the subject and tense stay the same. This makes the sentence smoother and less repetitive.

They are related, but not identical.

Destacar is broader. It can mean:

• to highlight
• to emphasize
• to point out
• to make something stand out

Sublinhar more specifically means:

• to underline
• sometimes, figuratively, to emphasize

So in this sentence:

• destacar o melhor argumento suggests selecting or emphasizing the best argument
• sublinhar a frase final suggests literally underlining the final sentence or line

In other words, destacar is more general, while sublinhar is more specific.

Because Portuguese normally uses the definite article with superlatives like melhor, pior, maior, and menor when referring to a specific item in a set.

So:

• o melhor argumento = the best argument
• a melhor ideia = the best idea

That o is very natural here because the sentence refers to one specific argument judged to be the best.

Adjective position in Portuguese is flexible, but some patterns are more natural than others.

Here:

• melhor often comes before the noun
• final usually comes after the noun

So:

• o melhor argumento
• a frase final

A useful general idea is:

• evaluative adjectives often come before the noun
• classifying or descriptive adjectives often come after the noun

This is not an absolute rule, but it helps explain why these two sound natural in those positions.

Yes, it can.

In Portuguese, frase can mean:

• a sentence
• a phrase
• a saying or quotation

The exact meaning depends on context.

In a sentence about editing or reviewing writing, a frase final most naturally means the final sentence or the final line.

Although sentença exists, it is less common in everyday Brazilian Portuguese for ordinary grammar talk. It can sound more technical, formal, or even legal.

It means to review or check the spelling.

Ortografia is orthography, but in normal English this usually corresponds to spelling.

So revisar a ortografia means something like:

• review the spelling
• check the spelling
• proofread for spelling

It sounds natural in Portuguese, especially in academic, editorial, or proofreading contexts.

Yes, but the nuance is a little different.

• revisar a ortografia = review/check the spelling
• corrigir a ortografia = correct the spelling

So:

• if you are checking whether there are mistakes, revisar is a great choice
• if you are actively fixing mistakes, corrigir is more specific

Both are possible, but revisar fits well if the action is part of proofreading.

Portuguese uses definite articles more often than English does.

Here, both nouns are understood as specific:

• a frase final = the specific final sentence of the text
• a ortografia = the spelling of that text

In English, you might sometimes omit an article in similar situations, but Portuguese usually keeps it.

So the articles here are normal and expected.

In Brazilian Portuguese, sublinhar is pronounced approximately like soob-leen-YAR.

The tricky part is nh, which makes a sound similar to ny in canyon.

So the last part:

• nhar sounds roughly like nyar

A rough breakdown is:

• sub
• li
• nhar

with the stress on the last syllable:

sub-li-NHAR

This is a useful word to practice because nh is a very common Portuguese sound.