The conditional perfect is used to make statements that are contrary to reality. Something would, or would not, have happened if some condition had been met. As an example, “I would have done the assingment last night, if I had only taken my notebook with me to the party."

The conditional perfect can also be used to express probability or conjecture about the completion of an action prior to some point in the past:

• El habría sacado la gorda antes de comprar aquella mansion.
  He would have won the lottery before purchasing that mansion.

• El profesor le habría prometido una marca perfecta cuando empezó el curso.
  The professor must have promised him an A plus when he started the course.

hablar (example sentences) (full conjugation)

yo	habría hablado	(I would have spoken)
tú	habrías hablado	(you would have spoken)
él/ella/Ud.	habría hablado	(he/she/you would have spoken)
nosotros (as)	habríamos hablado	(we would have spoken)
vosotros (as)	habríais hablado	(you guys would have spoken)
ellos/ellas/ Uds.	habrían hablado	(you all/they would have spoken)

comer (example sentences) (full conjugation)

yo	habría comido	(I would have eaten)
tú	habrías comido	(you would have eaten)
él/ella/Ud.	habría comido	(he/she/you would have eaten)
nosotros (as)	habríamos comido	(we would have eaten)
vosotros (as)	habríais comido	(you guys would have eaten)
ellos/ellas/ Uds.	habrían comido	(you all/they would have eaten)

recibir (example sentences)(full conjugation)

yo	habría recibido	(I would have received)
tú	habrías recibido	(you would have received)
él/ella/Ud.	habría recibido	(he/she/you would have received)
nosotros (as)	habríamos recibido	(we would have received)
vosotros (as)	habríais recibido	(you guys would have received)
ellos/ellas/ Uds.	habrían recibido	(you all/they would have received)