he debido

I must have

→ haber
phrase Rare #54,066
I must have Used before an infinitive to express a guess or deduction about something that happened.
SP: He debido dejar las llaves en casa.
EN: I must have left the keys at home.

He debido grabar encima.

I must have recorded over it.

— Realmente amor (2003)

He debido olvidarla también.

I must have forgotten her too.

— Summertime (1955)

Sí, sí, yo he debido pescar algo bueno.

Yes, yes, I must have caught something good.

— Die Blechtrommel (1979)

He debido soñar.

I must have been dreaming.

— La doble vida de Verónica (1991)