El Presente Perfecto

The present perfect is formed with the present tense of haber + the past participle of the verb you would like to use. There are two kinds of endings, one for -ar verbs and one for those ending in -er or -ir.

ojo2.gif - 639 BytesThe past participle always ends in "o". You don't have to match it with the subject.
 
  

Infinitive ending in -ar Infinitive ending in -er or -ir
hablar comer vivir
yo he habl ado com ido viv ido
tú has habl ado com ido viv ido
él, ella, Ud.  ha habl ado com ido viv ido
nosotros/ as  hemos habl ado com ido viv ido
vosotros/ as  habéis habl ado com ido viv ido
ellos, ellas, Uds.  han habl ado com ido viv ido

   The following verbs and those derived from them have some irregularity:
   
abrir abierto opened
cubrir cubierto covered
decir dicho said
escribir escrito written
freír frito written
hacer hecho done
morir muerto died
poner puesto put, set
resolver resuelto resolved
romper roto broken
satisfacer satisfecho satisfied
ver visto seen
volver vuelto returned
 
  As you can see, there are also irregular past participles in English. For more information on past participles click here . Some examples of verbs derived from the above infinitives are: descubrir, contradecir, describir, deshacer, componer, devolver  etc.