Se te enganares no acento, podes perguntar à professora.

Because after se in this kind of sentence, Portuguese often uses the future subjunctive.

So:

• Se te enganares... = If you make a mistake... / If you happen to get it wrong...

The verb here is enganar-se (to make a mistake / to be mistaken), and enganares is the future subjunctive, 2nd person singular form.

This structure is very common in Portuguese:

• Se precisares, diz. = If you need [it], say so.
• Se fores, avisa. = If you go, let me know.

In English, we usually just use the present after if, but Portuguese often uses the future subjunctive when talking about a possible future situation.

Te means yourself or you as a reflexive object.

The verb is enganar-se, which literally means something like to deceive oneself, but in normal usage it often means:

• to be mistaken
• to make a mistake

So:

• enganar-te = to make a mistake / to get it wrong

In this sentence:

• Se te enganares = If you make a mistake

This is why te is there: it is part of the reflexive verb.

In Portuguese, object pronouns like me, te, se, nos, vos often go before the verb, especially after words that trigger this position.

Here, se triggers that placement:

• Se te enganares...

This is called proclisis.

You would not normally say:

• Se enganares-te... ❌

So the pronoun goes before the verb because the word se attracts it.

No acento is a contraction of:

• em + o = no

So:

• no acento = in the accent / on the accent mark

In practice, here it means with the accent mark or about the accent.

For example, it could refer to writing the wrong accent in a word, such as using á instead of à, or forgetting an accent mark.

Here it most likely means accent mark, not a spoken accent.

In Portuguese, acento can refer to:

1. a written accent mark
   
   • like á, ê, ó
2. a spoken accent / pronunciation pattern

Because the sentence is about making a mistake and asking the teacher, no acento most naturally means with the written accent mark.

So the idea is something like:

• If you get the accent mark wrong, you can ask the teacher.

Because à is the contraction of:

• a (the preposition to)
• a (the feminine singular definite article the)

So:

• a + a = à

The verb perguntar usually takes the preposition a when you ask someone something:

• perguntar à professora = to ask the teacher

Compare:

• Perguntei ao professor. = I asked the male teacher.
• Perguntei à professora. = I asked the female teacher.

This à is not just a written accent mark added for decoration; it shows a real contraction.

Because after a modal verb like poder, the next verb stays in the infinitive.

So:

• podes perguntar = you can ask

This works like English:

• you can ask not
• you can asks

Other examples:

• Podes sair. = You can leave.
• Podes estudar agora. = You can study now.

So perguntar stays in the infinitive because it depends on podes.

Yes, it is especially natural in European Portuguese because it uses tu.

• podes = you can for tu

In Portugal, tu is very common in everyday speech, so podes sounds normal and natural.

In Brazilian Portuguese, many speakers would more often say:

• você pode perguntar

European Portuguese also uses você, but depending on context it may sound more formal, distant, or regionally variable.

So this sentence sounds very natural for Portugal because it uses tu forms:

• te
• enganares
• podes

The comma separates the conditional clause from the main clause.

• Se te enganares no acento, = conditional part
• podes perguntar à professora. = main part

This is similar to English:

• If you make a mistake with the accent, you can ask the teacher.

The comma helps make the structure clear and is normal in this kind of sentence.

Yes, com o acento would also be understandable, and in some contexts it may even sound more natural to learners because it maps well onto English with the accent.

The difference is subtle:

• enganar-se no acento = make a mistake in/on the accent
• enganar-se com o acento = make a mistake with the accent

Both can work, but no acento sounds very idiomatic in Portuguese for making an error in a specific detail.

Yes, that is a good way to think about it.

In Portuguese:

• perguntar algo a alguém = to ask someone something
• literally: to ask something to someone

Examples:

• Perguntei a resposta ao professor. = I asked the teacher for the answer.
• Pergunta à professora. = Ask the teacher.

So in the sentence:

• podes perguntar à professora

the à marks the person you are asking.

It can suggest either, depending on context.

Because enganar-se often means to be mistaken / to get something wrong, the phrase can feel like:

• If you get the accent wrong...

But in natural English, If you make a mistake with the accent... is also a very good translation.

So the Portuguese expression covers both ideas quite well.