Familiar, then not
Portuguese sentences start out looking like English ones. Subject, verb, object, in that order. Then you notice the subject has gone missing, the adjective is on the wrong side of the noun, and someone has moved the object to the front for reasons nobody explained.
None of it is random. Word order in Portuguese carries meaning that English handles with stress and intonation, which is why translating the words alone loses so much.
The vanishing subject
Neutral order is the one you already know:
Subject + verb + object
O Pedro (S) comprou (V) um livro (O).
The difference is that Portuguese drops the subject pronoun whenever the verb ending already gives it away, which is most of the time. Include eu in every sentence and you sound like you are insisting on something.
Natural: Vou ao mercado.
Textbook: Eu vou ao mercado.
That missing subject is a listening problem before it is a speaking one. The only clue to who is doing the thing sits on the end of the verb, and endings are exactly the part Portugal compresses hardest. When a pronoun does turn up, there is usually a reason: a contrast, as in Eu vou, mas tu ficas, or a narrative that has got crowded enough to need it.
Adjectives, and which side they sit on
The default is after the noun, the reverse of English.
Um carro azul.
Uma casa grande.
Position is not fixed, though, and moving the adjective moves the meaning. After the noun is literal and measurable. Before it, the adjective turns subjective, and occasionally sarcastic.
| Phrase | Meaning | Position |
|---|---|---|
| Um homem grande | A tall/large man (Physical) | After (Objective) |
| Um grande homem | A great man (Character) | Before (Subjective) |
| Um carro novo | A brand new car | After (Objective) |
| O meu novo carro | My "new" car (might be used) | Before (Subjective) |
Two words, same order swapped, and a large man becomes a great one.
Moving the important thing to the front
Speakers abandon SVO constantly, and this is a good part of why fast speech is hard to follow: the sentence does not open where you expect. Grammarians call it topicalisation. The object gets hoisted to the front to set the scene, and the rest of the sentence arrives afterwards.
Standard: Eu não conheço aquele homem.
Fronted: Aquele homem, eu não conheço.
Headlines love it. So does anyone mid-argument.