Why irregular verbs matter so much
Many of the most frequently used verbs in Spanish are irregular. Verbs such as ser (to be), estar (to be), ir (to go), tener (to have) and hacer (to do, to make) appear in almost every conversation, so you meet their odd forms very early. The good news is that irregular verbs fall into a small number of patterns, and learning the patterns is faster than memorising every form one by one.
This guide explains what “irregular” means in Spanish, groups the common verbs by type, shows the key forms of the ones you will use most, and gives you a list of 25 verbs to learn first.
What are irregular verbs in Spanish?
A regular Spanish verb keeps the same stem (the part before -ar, -er or -ir) and takes predictable endings. For example, hablar gives hablo, hablas, habla, hablamos, habláis, hablan in the present tense.
An irregular verb breaks that pattern in some way. The stem may change, the yo form may be unusual, or the whole verb may follow its own rules. Grammar books often split irregularity into these groups:
- Stem-changing verbs: a vowel in the stem changes when it is stressed (pensar becomes pienso).
- Irregular first-person (yo) verbs: only the yo form is odd (hacer becomes hago).
- Fully irregular verbs: many forms are unpredictable (ser, ir, estar).
- Irregular preterite stems: the past tense uses a different stem (tener becomes tuve).
A verb can belong to more than one group. Tener, for example, has an irregular yo form (tengo), a stem change (tienes) and an irregular preterite stem (tuve).
The main types of irregularity
Stem-changing verbs
In the present tense, the stressed vowel changes in the yo, tú, él/ella/usted and ellos/ellas/ustedes forms. The nosotros and vosotros forms keep the original vowel. This is sometimes called the “boot” pattern.
| Change | Example verb | Present tense forms |
|---|---|---|
| e to ie | querer (to want) | quiero, quieres, quiere, queremos, queréis, quieren |
| o to ue | poder (to be able to) | puedo, puedes, puede, podemos, podéis, pueden |
| e to i | pedir (to ask for) | pido, pides, pide, pedimos, pedís, piden |
Other common verbs in these groups include pensar (to think), empezar (to begin), volver (to return), dormir (to sleep) and encontrar (to find). For a closer look at one of them, see our guide to empezar conjugation.
Irregular yo forms
These verbs are regular in most of the present tense, but the first-person singular is different.
- -go verbs: hacer gives hago, poner gives pongo, salir gives salgo, traer gives traigo, tener gives tengo, venir gives vengo, decir gives digo.
- -zco verbs: conocer gives conozco, traducir gives traduzco, parecer gives parezco.
- Other odd yo forms: saber gives sé, dar gives doy, ver gives veo, caer gives caigo, oír gives oigo.
If you want to see one of these verbs in full, our pages on the present tense of poner and on conjugating ver walk through the forms.
Fully irregular verbs
A few verbs are irregular almost everywhere. You simply have to learn them. The present tense forms are:
| Verb | yo | tú | él/ella/usted | nosotros | vosotros | ellos/ellas/ustedes |
|---|---|---|---|---|---|---|
| ser (to be) | soy | eres | es | somos | sois | son |
| estar (to be) | estoy | estás | está | estamos | estáis | están |
| ir (to go) | voy | vas | va | vamos | vais | van |
| tener (to have) | tengo | tienes | tiene | tenemos | tenéis | tienen |
| hacer (to do, make) | hago | haces | hace | hacemos | hacéis | hacen |
| decir (to say) | digo | dices | dice | decimos | decís | dicen |
Irregular preterite stems
The preterite (simple past) of many common verbs uses an irregular stem and a special set of endings with no accent marks: -e, -iste, -o, -imos, -isteis, -ieron.
| Verb | yo | él/ella/usted | ellos/ellas/ustedes |
|---|---|---|---|
| tener | tuve | tuvo | tuvieron |
| estar | estuve | estuvo | estuvieron |
| hacer | hice | hizo | hicieron |
| poder | pude | pudo | pudieron |
| poner | puse | puso | pusieron |
| querer | quise | quiso | quisieron |
| saber | supe | supo | supieron |
| venir | vine | vino | vinieron |
| decir | dije | dijo | dijeron |
Note that decir and other verbs with a j in the stem use -eron rather than -ieron (dijeron, not dijieron). Two verbs are different again: ser and ir share the same preterite forms (fui, fuiste, fue, fuimos, fuisteis, fueron), and dar and ver take the endings of regular -er/-ir verbs without accents (di, diste, dio and vi, viste, vio).
25 common irregular verbs to learn first
There is no single official ranking, and different frequency lists order these verbs slightly differently. The verbs below appear again and again across everyday Spanish, and most learner resources include them. They are grouped by the type of irregularity.
Fully irregular or highly irregular
- ser (to be)
- estar (to be)
- ir (to go)
- haber (to have, auxiliary verb: he, has, ha, hemos, habéis, han)
- dar (to give)
- ver (to see)
Irregular yo forms (with or without other changes)
- tener (to have)
- hacer (to do, make)
- decir (to say, tell)
- venir (to come)
- poner (to put)
- salir (to leave, go out)
- traer (to bring)
- saber (to know a fact, know how to)
- conocer (to know a person or place)
- oír (to hear)
- caer (to fall)
Stem-changing verbs
- poder (to be able to)
- querer (to want)
- pensar (to think)
- volver (to return)
- dormir (to sleep)
- pedir (to ask for, order)
- seguir (to follow, continue)
- encontrar (to find)
Learning the “super 7” and similar short lists
You may see the phrase “super 7 verbs” in teaching materials. It is not a standard grammar term, and different teachers choose different verbs. The lists usually pick a handful of very frequent verbs, often ser, estar, ir, tener and hacer plus a couple of others, and have students master them first. If a course uses the term, follow that course’s list. The idea is sound either way: concentrate on a short set of high-frequency verbs before widening out.
What are the most common verb tenses in Spanish?
Beginners typically meet these tenses first:
- Present (hablo): habits, facts and current actions.
- Preterite (hablé): completed past actions.
- Imperfect (hablaba): ongoing or repeated past actions and descriptions.
- Future (hablaré) and the near future with ir a (voy a hablar).
- Present perfect (he hablado).
- Conditional (hablaría) and the present subjunctive (hable) at the intermediate stage.
Irregular verbs matter in all of them. In the future and conditional, for example, verbs like tener, hacer, poder, decir and poner use irregular stems (tendré, haré, podré, diré, pondré), but the endings stay regular.
How to practise irregular verbs
- Learn by pattern, not alphabetically. Group verbs that behave the same way (all the -go verbs, all the e to ie verbs).
- Start with the present tense of the top 10 verbs, then add the preterite.
- Use full sentences. Tengo hambre (I am hungry) sticks better than the bare form tengo.
- Review little and often. Short daily sessions with flashcards or spaced repetition tend to work better than one long session. See why review matters in learning for how to space your practice.
- Say the forms aloud, especially forms with spelling changes such as pido and pides.
- Practise related skills, such as irregular gerunds and commands, where many of the same verbs behave irregularly again.
Common mistakes with irregular verbs
- Regularising the verb: saying tenir or hacío. Check the irregular form before you speak.
- Mixing up ser and estar: both mean “to be”, but they are used differently. Soy cansado is not what you want to say about being tired right now. Estoy cansado is.
- Forgetting that ser and ir share a preterite: fui can mean “I was” or “I went”. Context tells you which.
- Missing accents: sé (I know) versus se (a pronoun), and dé versus de are different words.
FAQ
Are all stem-changing verbs irregular? Grammar books usually treat them as irregular because the stem changes, but they follow predictable patterns, so they are easier than fully irregular verbs.
Is conocer an irregular verb? Yes, but only in a small way. Its yo form is conozco, and the rest of the present tense is regular (conoces, conoce, conocemos, conocéis, conocen).
Do irregular verbs ever become regular in other tenses? Often, yes. Many verbs with irregular present forms have regular imperfect forms. Only ser, ir and ver are irregular in the imperfect (era, iba, veía).
Should I learn the verb tables or just use the verbs? Both. Tables help you see the pattern, but you will remember the forms better if you use them in sentences and conversation.