THE PRESENT PERFECT SUBJUNCTIVE
The present perfect subjunctive is used in the same kinds of dependent clauses as the present subjunctive. It is used to indicate that the action in the dependent clause happened before the action in the main clause.
You should still be following the same rules: the subjects in each clause should differ, the verb in the dependent clause should always be in the subjunctive, and the verb in the main clause should indicate Need, Emotion, Exaggeration, Demand, Supposing; Preference or possibility, Asking Wishing, or Seeming (remember NEEDS PAWS).
To form the present perfect subjunctive, simply take "Haber" in the present subjunctive, and add your past participle:
| Haber | to have |
| Haya | hayamos |
| Hayas | hayáis |
| Haya | hayan |
Me alegro
de que ustedes hayan venido a la fiesta.Espero que hayas visto a Krista hoy. Necesito hablar con ella.
Dudo que Javier haya escrito una carta de amor a María.
Es una lástima que María haya intentado a seducir a Javier.
Es mejor que las chicas tontas no hayan dicho nada .
Mamá no cree que Lucía haya puesto la mesa.
Me sorprende que los niños hayan hecho las camas.