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No entiendo por qué "sido" se usa en esta frase. Yo estaba seguro de que no había sido visto por nadie. ¿Por qué no "había estado visto"? Parece más un estado para mí, más que una característica.

Answers · 6

1
"Ser visto", así como "ser escuchado", "ser obligado", etc. son todos verbos en voz pasiva. Cuando un verbo se utiliza de esa manera, necesariamente se conjuga con el verbo "ser". Por tanto, el hecho de que se use dicho verbo y no el "estar" no tiene relación directa con el significado de ambos.
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La palabra " sido" indica el pasado del verbo "ser" Se usa por que la oracion esta en pasado
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Ximena's right, "sido" is verb "be" in past, but not simple past, this would be "fui" or "estuve" (that would be verb "ser" in simple past) if you see "haber", conjugated (I mean in its form "Había") before "sido" then you have the equivalent in English of "Have/Had been", so "haber/tener" is the same as "Have". Your sentence is translated to English like: "I was sure I hadn't been seen by anyone" In this case you're making reference that you were sure but it wasn't true at all and maybe someone saw you but you didn't know in that time.

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