Past modals · Modais no passado
Looking back with modals
- Past modals = modal verb + have + past participle.
- They let you guess, regret, or imagine about the past.
- He must have left. I should have called.
He must have forgotten the appointment; his calendar looked equally surprised.
Olhando para trás com modais
- Modais do passado = modal + have + particípio passado.
- Eles permitem adivinhar, regretar ou imaginar sobre o passado.
- Ele deve ter saído. Eu deveria ter ligado.
Ele deve ter esquecido o compromisso; sua agenda parecia igualmente surpreso.
must have / can't have (deduction)
- must have + p.p. = you're sure it was true: He must have forgotten.
- can't have + p.p. = you're sure it wasn't: She can't have seen us.
- These are confident guesses about the past.
must have / can't have (dedução)
- must have + p.p. = você tem certeza de que foi verdadeiro: Ele deve ter esquecido.
- can't have + p.p. = você tem certeza de que não foi: Ela não pode nos ter visto.
- São palpites confiantes sobre o passado.
He's not answering. He ___ his phone. (sure deduction) · Ele não está respondendo. Ele ___ seu telefone. (dedução segura)
Past deduction → must have + past participle: “must have forgotten”. · Dedução no passado → must have + particípio passado: “must have forgotten”.
Does “can't have + past participle” mean something was impossible in the past? · “Can't have + particípio passado” significa que algo foi impossível no passado?
Yes — “She can't have seen us” = it's impossible that she saw us. · Sim — “She can't have seen us” = é impossível que ela nos tenha visto.
Translate into English: 他一定是忘了。 · Traduza para o inglês: 他一定是忘了。
Sure about the past → must have + p.p.: “He must have forgotten.” · Seguro sobre o passado → must have + p.p.: “He must have forgotten.”
should have (regret, criticism)
- should have + p.p. = "the right thing to do, but it didn't happen".
- I should have studied harder. (regret)
- You shouldn't have said that. (criticism)
should have (arrependimento, crítica)
- should have + p.p. = "a coisa certa a fazer, mas não aconteceu".
- Eu deveria ter estudado mais. (arrependimento)
- Você não deveria ter dito isso. (crítica)
Regret: I ___ have studied harder. (one modal verb) · Arrependimento: Eu ___ ter estudado mais. (um verbo modal)
Past regret → should have + past participle: “I should have studied”. · Arrependimento no passado → should have + particípio passado: “I should have studied”.
could have / might have (possibility)
- could / might have + p.p. = it was possible, but we're not sure.
- They might have missed the train. It could have been worse.
- could have can also mean "was able to, but didn't".
could have / might have (possibilidade)
- could / might have + p.p. = era possível, mas não temos certeza.
- Eles podem ter perdido o trem. Poderia ter sido pior.
- could have também pode significar "pode ter feito, mas não fez".
What is the modal doing? · O que o modal está fazendo?
must/can't have = confident deduction; could/might have = open possibility; should have = criticism or regret. · must/can't have = dedução confiante; could/might have = possibilidade aberta; should have = crítica ou arrependimento.
Common mistakes
- ❌ He must forgot. → ✓ He must have forgotten. — past deduction = modal + have + participle.
- ❌ should of gone → ✓ should have gone. — of is a mis-heard have.
- ❌ I could help you yesterday, but I was busy. → ✓ I could have helped you. — unused past chance.
Erros comuns
- ❌ He must forgot. → ✓ He must have forgotten. — dedução no passado = modal + have + particípio.
- ❌ should of gone → ✓ should have gone. — of é um mal-entendido de have.
- ❌ I could help you yesterday, but I was busy. → ✓ I could have helped you. — oportunidade passada não utilizada.
Match each sentence to its meaning. · Combine cada frase ao seu significado.
must have = sure it happened; might have = maybe; should have = it didn't but ought to; can't have = sure it didn't. · must have = certeza de que aconteceu; might have = talvez; should have = não aconteceu mas deveria; can't have = certeza de que não aconteceu.
Complete (criticism): You ___ have told me earlier! · Completo (crítica): Você ___ me avisou antes!
should have + participle = you didn't, and that was wrong. · should have + particípio = você não fez, e isso foi errado.
- Sure about the past: must have / can't have + p.p.
- Regret / criticism: should(n't) have + p.p.
- Possibility: could / might have + p.p.
- Certeza sobre o passado: must have / can't have + p.p.
- Arrependimento / crítica: should(n't) have + p.p.
- Possibilidade: could / might have + p.p.
Write one sentence about a past regret, using “should have” + a past participle. · Escreva uma frase sobre um arrependimento passado, usando “should have” + um particípio passado.
Example: “I should have called you earlier.” · Exemplo: “I should have called you earlier.”