Most of the common verbs used in the past in Spanish are irregular.
Here is a list of some in the Yo form and underneath examples of other parts of the verbs:
| YO FORM | INFINITIVE | TRANSLATION |
| anduve | andar | to walk |
| cupe | caber | to fit |
| di | dar | to give |
| dije | decir | to say |
| estuve | estar | to be |
| fui | ser | to be |
| fui | ir | to go |
| hube | haber | to have |
| hice | hacer | to make / to do |
| pude | poder | to be able to |
| puse | poner | to put |
| quise | querer | to want |
| supe | saber | to know |
| tuve | tener | to have |
| traje | traer | to bring |
| vine | venir | to come |
| vi | ver | to see |
Por ejemplo:
| El año pasado fui a Barcelona | Last year I went to Barcelona |
| La semana pasada quise ir al cine | Last week I wanted to go to the cinema |
| ¿Qué hiciste? | What did you do? |
| Mi amigo anduvo al instituto | My friend walked to school |
| Vimos la nueva película | We saw the new film |
| Tuvimos hambre | We were hungry |
| ¿Hicisteis las camas? | Did you make the beds? |
| Mis padres estuvieron de vacaciones | My parents were on holidays |
| Los chicos trajeron un pastel a la fiesta | The boys took a cake to the party |