O Pedro parece tenso antes da entrevista.

In European Portuguese, it is very common to use the definite article before a person's first name: o Pedro, a Maria, o João.

So O Pedro is completely natural in Portugal. It does not mean the Pedro in the odd way that would sound in English; it is just a normal Portuguese pattern.

A few notes:

• In Portugal, using the article with names is very common in everyday speech.
• In some contexts, especially more formal writing, the article may be omitted.
• In Brazilian Portuguese, usage is more regional and less consistent.

So here, O Pedro is just the normal European Portuguese way to say Pedro.

Parecer means to seem or to look/seem. So parece tenso suggests an impression or appearance: Pedro gives the impression of being tense.

That is slightly different from está tenso, which more directly states that he is tense.

Compare:

• O Pedro parece tenso. = Pedro seems tense.
• O Pedro está tenso. = Pedro is tense.

So parece is less direct and more observational.

Because the subject is O Pedro, which is third person singular.

The infinitive is parecer. In the present tense:

• eu pareço
• tu pareces
• ele/ela/você parece
• nós parecemos
• vocês/eles/elas parecem

Since Pedro = he, the correct form is parece.

Adjectives in Portuguese usually agree in gender and number with the noun they describe.

Pedro is masculine singular, so the adjective is also masculine singular:

• O Pedro parece tenso.

If the subject were feminine, it would change:

• A Ana parece tensa.

If plural:

• Os rapazes parecem tensos.
• As raparigas parecem tensas.

So tenso matches Pedro.

Because de + a normally contracts to da in Portuguese.

Here the expression is antes de + noun phrase:

• antes de a entrevista → antes da entrevista

This kind of contraction is very common:

• de + o = do
• de + a = da
• de + os = dos
• de + as = das

So:

• antes do exame
• antes da entrevista
• antes dos testes
• antes das aulas

Here a entrevista refers to a specific interview, so the article is natural.

Antes da entrevista means before the interview, usually one that is known from the context.

Antes de entrevista is not the normal choice in this sentence. Without the article, it sounds incomplete or unnatural here.

So if you are talking about a particular interview, antes da entrevista is the expected form.

Yes, it is possible, but in European Portuguese it sounds less typical in everyday speech.

In Portugal:

• O Pedro parece tenso... = very natural
• Pedro parece tenso... = possible, but less colloquial in many contexts

So a learner of European Portuguese should get used to hearing and using the article with first names.

Yes. Portuguese allows some flexibility.

The original sentence is neutral and very natural:

• O Pedro parece tenso antes da entrevista.

You can also move the time expression to the front:

• Antes da entrevista, o Pedro parece tenso.

That version puts a little more focus on before the interview. Both are correct.

In European Portuguese, parece is pronounced roughly like puh-RESS-uh, but with a very reduced final vowel.

The stress is on the second syllable:

• pa-RE-ce

A more Portuguese-like sound is approximately:

• puh-RESS(uh)

A few pronunciation notes:

• The r is tapped.
• The final e in European Portuguese is often a very weak sound.
• The c in parece sounds like s because it comes before e.

So the key thing is: stress the middle syllable, RE.

No. In fact, adding ele would usually be unnecessary because the subject is already stated: O Pedro.

Portuguese often does not use subject pronouns when the subject is clear.

So:

• O Pedro parece tenso... = natural
• Ele parece tenso... = also possible, but only if he is already understood from context
• O Pedro ele parece tenso... = generally not the normal neutral structure here

Since O Pedro is already present, no extra pronoun is needed.