Learn Hardcore Portuguese (Brazil): Você entra na sala de aula cedo.

na is the contraction of the preposition em + the feminine definite article a, so na literally means in the. You need it here because you’re talking about being in the classroom – em + a sala combines into na sala.

Why is it sala de aula instead of just aula?

aula by itself means class (as in a lesson or lecture). sala de aula literally means room of class, i.e. classroom (the physical space). If you said just aula, you’d be saying class, not classroom.

Why is the verb entra in the simple present and not a continuous form?

In Portuguese the simple present (presente do indicativo) is used for habitual actions (“you habitually enter early”) or general facts. If you want to express that the action is happening right now (present continuous), you’d say Você está entrando na sala de aula cedo.

Why is it entra and not entras or entrou?

entra is the 3rd-person singular in the present indicative of entrar, which matches você in Brazilian Portuguese.

entras would be 2nd-person singular (tu) in some dialects of European Portuguese.
entrou is the simple past (pretérito perfeito).

Why do Brazilians prefer você over tu, and can you drop você?

In most of Brazil, você is the standard informal 2nd-person pronoun; tu is only common in certain regions. Technically you can drop você because the verb ending -a tells you it’s 3rd-person, but in Brazilian Portuguese you usually keep você for clarity:
• (Você) entra na sala de aula cedo.

Can the adverb cedo move around in the sentence?

Yes. Adverbs of time are flexible in Portuguese. Common options include:
• Você entra cedo na sala de aula. (adverb right after the verb)
• Cedo você entra na sala de aula. (for stronger emphasis on “early”)
• Você entra na sala de aula cedo. (emphasis at the end)
All are grammatically correct; placement just shifts the focus.

Why is the definite article used before sala?

Portuguese normally requires a definite article before singular, countable nouns when they’re specific. a sala de aula means the classroom. Omitting the article (em sala de aula) would sound unnatural or overly generic (like “in a classroom setting”).

Is the word order subject–verb–object the same as in English?

Yes. The neutral word order in Portuguese is Subject–Verb–Object (SVO), just like in English. Here it is:
Subject: Você
Verb: entra
Prepositional object: na sala de aula
Adverb: cedo

How do you turn this statement into a question in Portuguese?

Portuguese doesn’t invert the subject and verb like English. You keep the same order and change the intonation or add a question mark:
Você entra na sala de aula cedo?
You can also add a tag question for confirmation:
Você entra na sala de aula cedo, não?