To form the preterite of a regular –ar verbs along with –er and –ir verbs it is a relatively straight forward conjugation. However, a number of verbs have very irregular forms in the preterite. The following verb tables show some of the most common. pronombre primero secundo trecero estar(to be) ander(to walk) conducir(to drive) yo estuve anduve conduje tú estuviste anduviste condujiste él/ ella/ usted … Continúa leyendo verbos irregulares: pretérito