VERBOS IRREGULARES/ IRREGULAR VERBS

Stem-changing verbs: e to ie

Spanish verbs are composed of a stem and a root (-ar, -er and -ir). Some irregular verbs change their stem in the present tense, indicative mode. When a verb is conjugated, and e is the last stem vowel, and it's stressed, e changes to ie. However, in the third (nosotros) and second-person (vosotros) plural forms, there is NO stem change because the stress does not fall on the stem that contains e. For a fully conjugated list, click on an underlined Spanish verb.

NOTE their endings are regular in all forms.

Pronoun	Pensar/ to think	Querer/ to want	Preferir / to prefer
yo/ I	pienso	quiero	prefiero
tú/ you	piensas	quieres	prefieres
él, ella, Ud./ he, she, you	piensa	quiere	prefiere
nosotros/ we	pensamos	queremos	preferimos
vosotros/ you	pensáis	queréis	preferís
ellos/ they	piensan	quieren	prefieren

Other verbs in the same category:
For a full conjugation, click on a verb	Cerrar/ to close, comenzar/ to start, empezar/ to begin, entender/ to understand, mentir/ to lie, negar/ to deny, perder/ to lose.

Stem-changing verbs: o to ue

Certain verbs change their stem in the present tense. When the last stem vowel is a stressed o, it changes to ue. Also note that stem vowel is NOT stressed in nosotros and vosotros; therefore, the o does NOT change to ue. Their endings are regular in all forms. For a fully conjugated list, click on an underlined Spanish verb.

Pronoun	Almorzar/ to have lunch	Poder/ to be able	Dormir/ to sleep
yo/ I	almuerzo	puedo	duermo
tú/ you	almuerzas	puedes	duermes
él, ella, Ud./ he, she, you	almuerza	puede	duerme
nosotros/ we	almorzamos	podemos	dormimos
vosotros/ you	almorzáis	podéis	dormís
ellos/ they	almuerzan	pueden	duermen

Other verbs in the same category:
For a full conjugation, click on a verb	contar/ to count, costar/ to cost (It's conjugated only in 3rd persons) devolver/ to return something, morir/ to die, mostrar/ to show, recordar/ to remember, soñar/ to dream about, sonar/ to ring, sound, volar/ to fly.

Stem-changing verbs: e to i

Verbs of the third conjugation group, -ir, change the stem vowel from e to i in the present tense, indicative mode. For these verbs, when e is stressed, and it's the last stem vowel, it changes to i. However, in nosotros and vosotros there is NO change. For a fully conjugated list, click on an underlined Spanish verb.

Pronoun	Competir/ to compete	Seguir/ to continue, follow
yo/ I	compito	sigo
tú/ you	compites	sigues
él, ella, Ud./ he, she, you	compite	sigue
nosotros/ we	competimos	seguimos
vosotros/ you	competís	seguís
ellos/ they	compiten	siguen

Other verbs in the same category:
For a full conjugation, click on a verb	conseguir/ to obtain, corregir/ to correct, decir/ to say, tell, elegir/ to elect, choose, impedir/ to prevent, pedir/ to ask for, repetir/ to repeat, servir/ to serve

Irregular 1st person forms

The following verbs are irregular only in the first person singular of the present tense, indicative mode. The other conjugations (persons) are regular. For a fully conjugated list, click on an underlined Spanish verb.

Full conjugation	Present, Indicative Mode
Conducir/ to drive	conduzco, conduces, conduce, conducimos, conducís, conducen
Conocer/ to know	conozco, conoces, conoce, conocemos, conocéis, conocen
Traducir/ to translate	traduzco, traduces, traduce, traducimos, traducís, traducen
Hacer/ to do, make	hago, haces, hace, hacemos, hacéis, hacen
Poner/ to put, place	pongo, pones, pone, ponemos, ponéis, ponen
Salir/ to go out	salgo, sales, sale, salimos, salís, salen
Traer/ to bring	traigo, traes, trae, traemos, traéis, traen
Oír/ to hear	oigo, oyes, oye, oímos, oís, oyen
Ver/ to see	veo, ves, ve, vemos, veis, ven
Saber/ to know	sé, sabes, sabe, sabemos, sabéis, saben