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How far the subjunctive reaches before the indicative takes over. The future subjunctive is the part your Spanish cannot help with.
The control text · argumentative
Proibir o celular nas escolas parece uma medida drástica, mas os resultados sugerem que ela funciona. Nas redes que adotaram a restrição, os professores relatam menos interrupções e uma queda nos casos de intimidação online. É verdade que o aparelho também é ferramenta de estudo, e seria ingênuo ignorar isso. Ainda assim, o custo da distração recai sobre quem já tem menos apoio em casa. Enquanto não houver evidência de que o uso livre melhora a aprendizagem, o ônus da prova cabe a quem defende a permissão.
Where the two part
Brazilian · the base
The future subjunctive is robust and obligatory. The present subjunctive erodes in speech after verbs of opinion, but the norma culta keeps it.
European · the contrast
Broadly the same system with less erosion in speech, and the imperfect subjunctive appears more readily in ordinary conversation.
10 options
Se não houver retorno até sexta-feira, vou registrar uma reclamação.
The tellSe plus a form that looks like an infinitive but is not.
Anchor A contains this. Spanish offers the present indicative here every single time, so getting it right is the highest-yield habit on the sheet.
For regular verbs it is identical to the personal infinitive, which makes it invisible until an irregular verb appears.
Quando receberem o comprovante, encerrem a assinatura.
The tellFuture reference after quando takes the subjunctive, not the future indicative.
Extremely frequent, and the error is one an examiner will notice at once.
English and Spanish both use a present or future here, so two of your languages push the same wrong way.
Enquanto não houver evidência, o ônus da prova cabe a quem defende.
The tellAnchor B closes on exactly this construction.
It gives an argument a conditional spine without hedging, which is precisely what a C2 script wants.
Its scope is easy to lose in a long sentence, and it demands the reader hold the condition open.
BR Peço que devolvam o valor.
EU Solicito que devolvam o montante.
The tellque plus a verb with the opposite vowel to the indicative.
Transfers directly from Spanish, so it is the cheapest subjunctive you have.
Almost none — which makes it a poor place to spend study time.
Duvido que tenham registrado o cancelamento.
The tellVerbs of doubt and denial take the subjunctive; verbs of assertion do not.
The line is the same as in Spanish, so the whole distinction comes free.
Brazilian speech blurs it after achar, so the spoken and written norms diverge here.
Acho que é cobrança indevida. — not seja
The tellA verb of opinion followed by the indicative.
What Brazilians actually say, and the subjunctive here would sound over-corrected in speech.
In formal writing the subjunctive is expected after some of these verbs, so the choice is register-bound rather than free.
Se soubesse disso em maio, teria cancelado o cartão.
The tell-sse endings, paired with a conditional in the other clause.
The standard counterfactual, identical in shape to Spanish, and it is where the conditional earns its keep.
Brazilian speech often replaces the conditional half with an imperfect, which makes the written pairing feel formal.
BR Queria pedir o estorno. · Se pudesse verificar…
EU Queria pedir o reembolso.
The tellA past-tense form used for a present request.
The single most efficient softener in the language, and it costs one word.
Used repeatedly it reads as timid, which in a complaint undercuts you.
Ainda que tenham cancelado a assinatura, a cobrança persistiu.
The telltenha or tivesse plus a participle inside a subordinate clause.
Places one event before another inside a concession, which is a genuinely advanced move.
Long, and in speech it is usually replaced by something simpler, so it belongs to writing.
BR Peço o estorno do valor.
EU Solicito o reembolso do montante.
The tellA noun where a clause would have been, so no mood decision arises.
Often more formal and shorter than the clause it replaces, and always correct.
In an exam that is testing the subjunctive, systematic avoidance is itself visible.