to have lost; to have missed
Él puede haber perdido el avión.
He may have missed his flight.
No debí haber perdido mi tiempo tratando de convencer a Tom de cambiar de idea.
I shouldn't have wasted my time trying to convince Tom to change his mind.
¿Qué opinas de haber perdido comunicación con la base?
What do you think about having lost communication with the base?
— Bacurau (2019)
No pueden haber perdido el partido.
They can't have lost the match.
He de haber perdido mi llave en el camino.
I must have lost my key along the way.
Él no puede haber perdido sus llaves.
He can't have lost his keys.
I must have lost weight.
Lamenté muchísimo haber perdido tanto tiempo.
I was very sorry to have wasted so much time.