Catalan present-tense irregularity is not one phenomenon. Some verbs add a velar consonant in the first-person singular, some alternate vowels according to stress, and a few combine stems of different historical origins. These patterns do not eliminate memorization, but they turn a long list of isolated forms into a smaller set of recognizable families.
The stress map behind many alternations
In many present paradigms, jo, tu, ell/ella, and ells/elles have stress on the stem, while nosaltres and vosaltres have stress on the ending. Grammarians call these root-stressed and ending-stressed forms. A vowel can therefore alternate in positions 1, 2, 3, and 6 but return to the infinitive-like shape in positions 4 and 5.
Compare collir:
| Person | Form | Stress pattern |
|---|---|---|
| jo | cullo | stem-stressed |
| tu | culls | stem-stressed |
| ell / ella | cull | stem-stressed |
| nosaltres | collim | ending-stressed |
| vosaltres | colliu | ending-stressed |
| ells / elles | cullen | stem-stressed |
A l'octubre collim les olives i al vespre les portem al molí.
In October we pick the olives and take them to the mill in the evening.
The u/o alternation follows stress here: cull- in root-stressed forms, coll- in ending-stressed collim/colliu. Sortir behaves similarly in the general Central pattern: surto, surts, surt, sortim, sortiu, surten. The pattern explains where an alternation appears, but not which verbs have it; that lexical fact still has to be learned.
The velar first-person family
Many frequent verbs have a first-person singular ending in a velar sound, usually written -c. The rest of the present indicative may lack that consonant entirely:
| Infinitive | jo | tu | nosaltres |
|---|---|---|---|
| tenir | tinc | tens | tenim |
| venir | vinc | vens | venim |
| dir | dic | dius | diem |
| dur | duc | dus | duem |
| poder | puc | pots | podem |
| prendre | prenc | prens | prenem |
| conèixer | conec | coneixes | coneixem |
| beure | bec | beus | bevem |
Tinc les entrades, però no sé on he deixat les claus.
I have the tickets, but I don’t know where I left the keys.
Et dic la veritat: avui no puc quedar.
I’m telling you the truth: I can’t meet today.
Sempre bec aigua abans de sortir a córrer.
I always drink water before going for a run.
These forms are related morphologically, but -c is not a productive ending you may add to any verb. Regular perdre gives perdo, not perc, and regular parlar gives parlo, not parlc. Learn the family membership. The velar stem becomes more visible in other moods—tingui, vingui, digui, pugui—which the velar stems page develops fully.
Other high-frequency first singulars have distinctive written shapes, notably faig, veig, and caic. They belong to the broader set of velar or otherwise special first-person forms, but each complete form must be memorized; replacing one ending mechanically with another does not produce standard forms.
Four high-frequency mixed paradigms
The following verbs combine more than one change, so knowing only the infinitive is not enough:
| Person | poder | voler | dir | veure |
|---|---|---|---|---|
| jo | puc | vull | dic | veig |
| tu | pots | vols | dius | veus |
| ell / ella / vostè | pot | vol | diu | veu |
| nosaltres | podem | volem | diem | veiem |
| vosaltres | podeu | voleu | dieu | veieu |
| ells / elles / vostès | poden | volen | diuen | veuen |
Poder combines velar puc with pot-/pod- alternation. Voler has exceptional vull plus vol-/vole-. Dir and veure use diphthong-bearing forms in several root-stressed positions but longer diem/dieu and veiem/veieu in the plural. There is no honest single formula that derives every cell; these are compact paradigms to memorize.
Pots abaixar una mica la música?
Can you turn the music down a little?
Volem anar-hi, però no podem sortir abans de les sis.
We want to go, but we can’t leave before six.
Què dieu quan algú us pregunta d'on sou?
What do you say when someone asks where you’re from?
Des del balcó veiem tota la plaça.
From the balcony we can see the whole square.
Suppletion: one verb, historically different stems
At the far end of irregularity are suppletive paradigms assembled from historically different stems. Anar has vaig, vas, va, anem, aneu, van, while ser has soc, ets, és, som, sou, són. The highly irregular haver (he, has, ha, hem, heu, han) also offers little help from analogy, but its forms are not normally classified as a suppletive set.
Ara vaig al centre, però demà anem directament a l'aeroport.
I’m going downtown now, but tomorrow we’re going straight to the airport.
Suppletion is genuinely arbitrary from a modern learner’s perspective. Historical explanation tells us why the pieces coexist, but it does not remove the need to memorize them. The payoff is high: these verbs occur constantly.
Families of compounds
Once a genuinely irregular base is learned, many prefixed verbs repeat its present pattern. Mantenir, obtenir, and contenir follow tenir: mantinc/mantens/mantenim, obtinc/obtens/obtenim, continc/contens/contenim. Comprendre follows prendre: comprenc, comprens, comprèn, comprenem.... Predir largely follows dir: predic, predius, prediu, prediem....
No comprenc per què mantenen aquesta norma.
I don’t understand why they keep this rule.
Check the whole compound, however. Similar spelling does not guarantee the same history or paradigm: produir is not a compound of dur and does not conjugate like it.
Weak pronouns do not change the stem
Finite weak pronouns precede these present forms, and the verb keeps exactly the same person and stem:
No ho veig clar, però t'ho dic demà.
I’m not sure about it, but I’ll tell you tomorrow.
De galetes, en vull dues; la resta te les pots quedar.
As for cookies, I want two; you can keep the rest.
The apostrophes and pronoun order may make the cluster look complex, but they do not create a new conjugation. Identify the finite verb first: veig, dic, vull, pots.
Form does not choose viewpoint or mood
An irregular stem tells you which form a verb has; it does not decide why the speaker uses that tense or mood. The simple present is neutral for habits, states, plans, and many current events. A progressive is reserved for an unfolding viewpoint:
Ara mateix estic veient com descarreguen el camió.
Right now I’m watching them unload the truck.
By contrast, Veig les muntanyes des de la finestra describes a current perceptual state naturally in the simple present. English aspect cannot be transferred mechanically.
Likewise, que does not mechanically trigger the subjunctive:
Sé que pot venir demà.
I know that she can come tomorrow.
Dubto que pugui venir demà.
I doubt that she can come tomorrow.
The first clause asserts ability and uses indicative pot; the second withholds commitment and uses subjunctive pugui. Read the asserted meaning, not just the conjunction.
Finally, distinguish morphology from the periphrastic past: vaig veure means “I saw,” while vaig a veure la mare can describe literal movement to see one’s mother. The preposition and construction determine the reading; the irregular form vaig alone does not.
Regional notes
The paradigms above use general forms with Central Catalan as the pronunciation baseline. Some restricted standard forms preserve different stems: tenc occurs (regional: Balearic and Alguerese) beside general tinc; faç occurs (regional: Balearic and Alguerese) beside faig, and feim/feis are (regional: Balearic) beside fem/feu. These are systematic regional forms, not mistakes. Keep one coherent regional paradigm in your own production and learn the others for recognition.
Mini-dialogue
—Pots venir demà al matí? —No ho sé; tinc hora al metge.
—Can you come tomorrow morning? —I don’t know; I have a doctor’s appointment.
—D'acord. Em dius alguna cosa al vespre? —Sí, quan arribi a casa i vegi l'agenda, t'ho dic.
—All right. Will you let me know this evening? —Yes, when I get home and see my calendar, I’ll tell you.
The dialogue moves among indicative pots, tinc, dius, and dic and subjunctive vegi. The stems are morphological facts; the clause’s time and assertion structure choose the tense and mood.
Common Mistakes
1. Regularizing a velar first singular.
❌ No podo obrir aquest pot.
Incorrect — the first-person singular of poder is puc.
✅ No puc obrir aquest pot.
I can’t open this jar.
2. Extending the first-person stem into nosaltres.
❌ No puguem entrar sense entrada.
Incorrect as a statement — puguem is subjunctive, while present indicative is podem.
✅ No podem entrar sense entrada.
We can’t enter without a ticket.
3. Inventing a regular first singular for dir.
❌ Sempre dico el que penso.
Incorrect — present indicative is dic.
✅ Sempre dic el que penso.
I always say what I think.
4. Missing the vowel alternation in voler.
❌ Nosaltres vullem una taula a fora.
Incorrect — the ending-stressed first-person plural is volem.
✅ Nosaltres volem una taula a fora.
We want a table outside.
5. Keeping indicative only because a familiar verb form comes to mind first.
❌ No crec que pot acabar-ho avui.
Incorrect — the ability is not asserted, so the embedded verb is subjunctive.
✅ No crec que pugui acabar-ho avui.
I don’t think she can finish it today.
Key Takeaways
- Stress often divides present paradigms into root-stressed persons 1, 2, 3, and 6 versus ending-stressed persons 4 and 5.
- Memorize the velar first-person family, but do not add -c to verbs freely.
- Learn high-frequency mixed paradigms such as puc/podem, vull/volem, dic/diem, and veig/veiem as compact sets.
- Irregular morphology supplies a form; viewpoint, discourse time, and assertion status determine how that form is used.
Now practice Catalan
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Start learning Catalan →Related Topics
- Velar Stems in the PresentA2 — Learn the Catalan verb family whose first-person present ends in a velar consonant, as in bec, dic, duc, tinc, and vinc.
- Present-Tense Vowel AlternationsA2 — Recognize the stress-conditioned and lexical vowel alternations in Catalan presents such as surto/sortim, cullo/collim, and treu/traiem.
- Present-Tense Spelling ChangesA2 — Keep a Catalan verb stem's consonant or vowel sequence stable by alternating c/qu, g/gu, ç/c, j/g, and diaeresis spellings.
- Present of TenirA1 — Conjugate present-tense tenir and use it naturally for possession, age, sensations, obligations, and common everyday expressions.
- Present of AnarA1 — Conjugate present-tense anar for movement and plans, and distinguish the same-looking forms used to build the periphrastic past.
- The Catalan Verb System: A First MapA1 — Understand Catalan person endings, conjugations, moods, tenses, nonfinite forms, auxiliaries, and pronoun placement as one system.