Perfect Infinitive  

Spanish Grammar The Perfect Tenses Perfect Infinitive

The "perfect infinitive" is a compound tense formed using the formula below:

haber + the past participle = perfect infinitive

Let's look at a few examples of use:

verb ser (to be)
the past participle of ser is sido
haber + sido = haber sido

Han de haber sido como las nueve.
It must have been about nine.

verb deber (to owe)
the past participle of deber is debido
haber + debido = haber debido

Le ha de haber debido unos mil pesos.
He must have owed him a thousand pesos.

verb reprobar (to fail)
the past participle of reprobar is reprobado
haber + reprobado = haber reprobado

Mi peor recuerdo es haber reprobado química.
My worst memory is to have failed chemistry.

verb ir (to go)
the past participle of ir is ido
haber + ido = haber ido

Ha de haber ido al centro.
He probably went downtown.

Espero haber terminado antes del mediodía.
I hope to have finished by noon.

Gracias por habernos invitado.
Thank you for having invited us.

Since the infinitive auxiliary verb is unconjugated, the past infinitive is the same for all subjects. In addition, the past participle is invariable.

Quisiera haber salido... - I want to have departed...
Ella quisiera haber salido... - She wants to have departed...
Quisiéramos haber salido... - We want to have departed...

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Popular Phrase: objeto directo | Spanish Verb Chart | Conjugated Verb: mover - to move [ click for full conjugation ]