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deve ter se enganado

must have been mistaken

→ dever
phrase Rare #42,446
must have been mistaken Expresses a likely conclusion about a past mistake.
PO: Ela deve ter se enganado com o horário.
EN: She must have been mistaken about the time.

Teller deve ter se enganado.

Teller must have made a mistake.

— Oppenheimer (2023)

Você deve ter se enganado.

You must be mistaken.

Deve ter se enganado.

You must have been mistaken.

— Podres de Ricos (2018)

Tom deve ter se enganado.

Tom must have been mistaken.