Irregular Conjugation Models

Haber — to have (auxiliary) / there is/are

Abolir — defective verb (to abolish)

Soler — defective + o→ue (to usually do)

Andar — irregular preterite (to walk)

Asir — irregular yo: asgo (to seize / grasp)

Caber — irregular yo + preterite (to fit)

Caer — irregular yo (caigo) + spelling (to fall)

Dar — monosyllabic irregular (to give)

Decir — highly irregular (to say / tell)

Erguir — suppletive stem alternation (to raise / erect)

Estar — to be (state/location)

Hacer — highly irregular (to make / do)

Ir — to go (suppletive)

Oír — irregular + spelling (to hear)

Placer — archaic irregular forms (to please)

Poner — yo pongo + irregular (to put / place)

Predecir — like decir (partial) (to predict)

Producir — c→zc + irregular preterite (to produce)

Pudrir — dual infinitive (to rot)

Raer — like caer/roer (to scrape)

Reír — e→í + spelling (to laugh)

Roer — multiple yo forms (to gnaw)

Saber — irregular yo + future (to know facts)

Salir — yo salgo + future (to leave / go out)

Satisfacer — like hacer (to satisfy)

Ser — to be (permanent)

Traer — yo traigo + spelling (to bring)

Valer — yo valgo + future (to be worth)

Ver — shortened stem (to see)

Passive voice (ser + participle)

Yacer — multiple yo forms (to lie in position)

Ahincar — mixed: accent í + c→qu (to press / insist)

Avergonzar — mixed o→ue + z→c (to shame / embarrass)

Cocer — mixed o→ue + c→z (to cook / boil)

Colgar — mixed o→ue + g→gu (to hang)

Elegir — mixed e→i + g→j (to choose / elect)

Empezar — mixed e→ie + z→c (to begin / start)

Enraizar — mixed accent í + z→c (to take root)

Forzar — mixed o→ue + z→c (to force)

Regar — mixed e→ie + g→gu (to water / irrigate)

Reñir — mixed e→i + elision ñ (to scold / quarrel)

Seguir — mixed e→i + gu→g (to follow / continue)

Trocar — mixed o→ue + c→qu (to exchange / swap)

Actuar — orthographic ú in stressed syllable (to act)

Airar — orthographic í in stressed syllable (to anger)

Aullar — orthographic ú in stressed syllable (to howl)

Averiguar — orthographic diaeresis ü (to find out / investigate)

Bruñir — elision of unstressed i (to burnish / polish)

Cazar — orthographic z→c before e (to hunt)

Coger — orthographic g→j before a/o (to take / catch)

Conocer — orthographic c→zc before a/o (to know people/places)

Creer — orthographic unstressed i→y (to believe)

Delinquir — orthographic qu→c before a/o (to commit a crime)

Dirigir — orthographic g→j before a/o (to direct / manage)

Distinguir — orthographic gu→g before a/o (to distinguish)

Guiar — orthographic accent í in stressed (to guide)

Influir — orthographic add -y- before vowel (to influence)

Lucir — orthographic c→zc before a/o (to shine / display)

Mecer — orthographic c→z before a/o (to rock / sway)

Pagar — orthographic g→gu before e (to pay)

Parecer — orthographic c→zc before a/o (to seem / appear)

Prohibir — orthographic accent í in stressed (to prohibit)

Reunir — orthographic accent ú in stressed (to gather / meet)

Sacar — orthographic c→qu before e (to take out / remove)

Tañer — elision of unstressed i (to play instrument / toll)

Zurcir — orthographic c→z before a/o (to darn / mend)

Levantarse — pronominal regular -ar (to get up)

Adquirir — stem change i→ie (to acquire)

Defender — stem change e→ie (to defend)

Desosar — stem change o→hue (to debone)

Discernir — stem change e→ie (-ir verb) (to discern)

Dormir — stem change o→ue + o→u (to sleep)

Encontrar — stem change o→ue (to find / encounter)

Errar — stem change e→ye (to err / wander)

Jugar — stem change u→ue (to play)

Mover — stem change o→ue (to move)

Oler — stem change o→hue (to smell)

Pedir — stem change e→i (to ask for / request)

Pensar — stem change e→ie (to think)

Poder — stem change o→ue + irregular (to be able to / can)

Querer — stem change e→ie + irregular (to want / love)

Sentir — stem change e→ie + e→i (to feel / regret)

Tener — to have / to hold

Venir — stem change e→ie + g-insertion (to come)

Volver — stem change o→ue + irregular PP (to return)