Assessing certainty in Portuguese

Level B2

Assessing certainty in Portuguese

When the news is still incomplete, you have to show how far you stand behind each piece of information. Here a neighborhood loses power in a storm, and people sort out what they know, what the clues point to and what is only possible. By the end, you can use é provável que, talvez and deve ter ocorrido to commit to exactly as much as you can support.

Two things you already know

After espero que and é importante que, Portuguese uses the subjunctive forms seja (from ser) and tenha (from ter): “Espero que seja rápido.”

News reports often put the event first with foi and a participle: “Foi anunciado que a energia volta às dez.” The same subjunctive forms come back here after é provável que and talvez, and the participle (anunciado) after deve ter.

Model: the power comes back

Listen for how sure each neighbor is. A luz here means the electricity, as it usually does in Brazilian speech; estouro is a loud bang, poste a utility pole and rede the power grid. Ocorreu is the company's word, repeated by the neighbor; in their own words, the two of them speak more plainly.

Words for judging what happened

Confirmed, a clue or only an idea?

The choice depends on what you have in hand. If someone confirmed it, simply state it: “O técnico confirmou: o transformador queimou.” With a clue, draw a conclusion: “Ouvi um estouro no poste. O transformador deve ter queimado.” With a reason to expect something but no direct sign of it, say what is likely: “Com essa chuva, é provável que tenha mais gente sem luz.” With nothing to go on, talvez keeps the idea open: “Não sei o que foi. Talvez seja o transformador.”

None of these expressions stands for a fixed percentage: context, tone and the reason you give decide how strong each one sounds.

Seja and tenha: the forms you need

These are the same forms you use after espero que. Tem meaning “there is” changes too: “tem mais gente” becomes “é provável que tenha mais gente.”

Stated as factAfter é provável que or talvez
éseja
sãosejam
temtenha
têmtenham

Say it is likely: é provável que

English can say “The cause is likely to be lightning,” but Portuguese has no such pattern: start with é provável que and put the verb in the subjunctive. Add bem for “quite” (é bem provável que) or pouco for “unlikely” (é pouco provável que). Giving your reason makes the assessment far more useful.

É provável que sujeito seja / tenha informação.

Keep it open: talvez before the verb

English “maybe” leaves the verb alone, so “Talvez é” is the tempting mistake. Before the verb, talvez brings the subjunctive: “Talvez seja isso.” Não goes right before the verb: “Talvez não seja o transformador.”

Talvez sujeito seja / tenha informação.

When the verb stays as it is

Not every que or talvez calls for the subjunctive. Acho que gives your opinion and takes an ordinary verb: “Acho que foi um raio.” If talvez arrives after the statement, as an afterthought, the verb doesn't change: “Foi um raio, talvez.” Compare “É provável que a causa seja um raio.” What matters is what comes before the verb.

Conclude about the past: deve ter + participle

Deve ter looks back at a past event and draws a conclusion. Only dever changes (deve, devem); ter stays the same, and so does the participle in -ado or -ido: queimado, chovido, ocorrido. Deve ter is close to “must have” but often lighter, closer to “probably did.” If what happened comes after the verb, the plural still counts: “Devem ter ocorrido duas falhas na mesma noite.”

Sujeito deve / devem ter particípio.

Ocorrer or acontecer?

Both describe an event, but ocorrer belongs to news, reports and official statements, much like English “occur”: “Ocorreu uma falha na rede elétrica às oito da noite.” With friends, acontecer is the natural choice: “Alguma coisa deve ter acontecido no poste da esquina.” The event often comes after the verb in this style. Three forms cover most uses: ocorreu, ocorreram and ocorrido.

Dever: a duty or a conclusion?

Like “must,” dever does two jobs, and the next word shows which. Deve or devem plus an infinitive is a duty, typical of notices: “Os moradores devem avisar a portaria.” With ter and a participle, it is a conclusion: “Os moradores devem ter avisado a portaria.” In conversation, tem que is the usual way to state a duty. You may also hear dever plus an infinitive as a guess about now (ele deve estar em casa), so let the situation guide you.

A careful statement to the press

The reporter uses o senhor, a respectful way to address a man, with the verb in the third person. Notice how the spokesperson separates what occurred, what is probable and what has not been confirmed. Careful wording like this is expected in public statements.

Your turn: choose how much to commit

In each example, cover what comes after the situation: the second sentence, or the words after então. Read the situation, for instance “Ninguém atende no escritório.”, decide whether you have a clue, a reasonable expectation or just an idea, and say your own version. Then compare.

Finally, change a detail and adjust. If the bank confirmed the error, what would you say instead?

In short

Ask what you actually have: confirmation, a clue, a reasonable expectation or only an idea. State the fact, use deve ter with a participle for a conclusion about the past, é provável que for what you expect, and talvez for what stays open. Use seja or tenha after é provável que and talvez. If someone asks “Por quê?”, you should be able to name your reason.

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