| A | B |
| yo abrir/I have opened | he abierto |
| yo cubrir/I have covered | he cubierto |
| yo decir/I have told (said) | he dicho |
| yo devolver/ I have given back | he devuelto |
| yo escribir/ I have written | he escrito |
| yo hacer/ I have made | he hecho |
| yo morir/ I have died | he muerto |
| yo poner/ I have put (placed) | he puesto |
| yo ver/ I have seen | he visto |
| yo volver/I have come back (returned) | he vuelto |
| tú abrir/you have opened | has abierto |
| tú cubrir/you have covered | has cubierto |
| él,ella decir/ s/he has told (said) | ha dicho |
| él devolver/ he has given back (returned) | ha devuelto |
| nosotros escribir/ we have written | hemos escrito |
| nosotras hacer/ we have made (done) | hemos hecho |
| ellos morir/ they have died | han muerto |
| ellas poner/ they have put | han puesto |
| tú y yo ver/you & I have seen | hemos visto |
| Marta y Ud. volver/ Marta & you have come back(returned) | han vuelto |