The verb tables below show the main irregularities that can occur in Spanish verbs. Note that there are a few spelling rules that apply to the language as a whole and which we generally don't class as verb irregularities (e.g. a stem ending in -c- will always spell this letter as -qu- before e or i).
For an introduction to regular Spanish verbs plus an explanation of the various irregularities illustrated by the verb tables below, see the following sections of the site:
Introduction to Spanish verbs
Present tense of -ar verbs (which includes links to sections on various irregularities in the present tense)
Preterite verb forms:
a section on the preterite, one of the parts of the Spanish verb system with the most irregularities.
abastecer | c changes to zc in yo form and throughout present subjunctive. c changes to j in preterite. |
abducir | c changes to zc in yo form and throughout present subjunctive. c changes to j in preterite. |
abnegar | e of stem changes to ie when stressed. |
abrir | Past participle ends in -ierto. |
acentuar | Last vowel of stem stressed before unstressed present tense endings. |
acostar | o of stem changes to ue when stressed. |
advertir | e of stem changes to ie when stressed, before preterite endings that have i vowel, and in present participle. |
agradecer | c changes to zc in yo form and throughout present subjunctive. |
andar | (Irregular verb.) |
atender | e of stem changes to ie when stressed. |
caber | (Irregular verb.) |
caer | (Irregular verb.) |
cocer | o of stem changes to ue when stressed. |
competir | e of stem changes to i when stressed, before preterite endings with i in them, and in present participle |
concluir | |
contener | (Irregular verb.) |
convenir | (Irregular verb.) |
dar | (Irregular verb.) |
deber | |
decir | (Irregular verb.) |
describir | Past participle ends in -scrito. |
deshacer | (Irregular verb.) |
dormir | (Irregular verb.) |
encontrar | o of stem changes to ue when stressed. |
envolver | o of stem changes to ue when stressed. Past participle ends in -uelto. |
estar | (Irregular verb.) |
extraer | (Irregular verb.) |
freír | Past participle ends in -ito. |
haber | (Irregular verb.) |
hacer | (Irregular verb.) |
imponer | (Irregular verb.) |
ir | (Irregular verb.) |
jugar | u of stem changes to ue when stressed. |
llegar | |
lucir | c changes to zc in yo form and throughout present subjunctive. |
morir | (Irregular verb.) |
oír | (Irregular verb.) |
partir | |
pedir | e of stem changes to i when stressed, before preterite endings with i in them, and in present participle |
poder | (Irregular verb.) |
poner | (Irregular verb.) |
prever | Basically regular except for past participle visto, and ee elided to e. |
proveer | Past participle ends in -visto. |
querer | (Irregular verb.) |
recocer | o of stem changes to ue when stressed. c changes to zc in yo form and throughout present subjunctive. |
revolver | Past participle ends in -uelto. o of stem changes to ue when stressed. |
reír | (Irregular verb.) |
reñir | Last vowel of stem stressed before unstressed present tense endings. e of stem changes to i when stressed, before preterite endings with i in them, and in present participle |
romper | Past participle ends in -oto. |
saber | (Irregular verb.) |
salir | Irregular form salgo, plus irregular future stem and imperative. |
satisfacer | Modelled on hacer. |
ser | (Irregular verb.) |
soler | o of stem changes to ue when stressed. No future (or conditional) forms. This verb has no preterite (or past subjunctive). |
tener | (Irregular verb.) |
valer | (Irregular verb.) |
ver | Basically regular except for past participle visto, and ee elided to e. |
yacer | Rarely used verb with some irregularities. |