Irregulares : be / was / ser o estar, bear / bore / aguantar, beat / beat / pegar, become / became / convertirse en, begin / began / empezar, bite / bit / morder, blow / blew / inflar, break / broke / romper, bring / brought / traer, build / built / construir, burn / burnt / quemar, burst / burst / estallar, buy / bought / comprar, can / could / poder, catch / caught / atrapar, choose / chose / escoger, come / came / venir, cost / cost / costar, cut / cut / cortar, deal / dealt / lidiar, dig / dug / escavar, do / did / hacer, draw / drew / dibujar, dream / dreamt / soñar, drink / drank / beber, drive / drove / manejar, eat / ate / comer, fall / fell / caer, feed / fed / alimentar, feel / felt / sentir, fight / fought / pelear, find / found / encontrar, fly / flew / volar, forbid / forbade / prohibir, forget / forgot / olvidar, freeze / froze / congelar.