Primitive 2, first pass: the forms. Aspect is 06, mood is 07. This document is the engine block; the next two are what it drives.
1The architecture
A conventional grammar presents Spanish as having fourteen-plus tenses and roughly two hundred irregular verbs. Both figures are artifacts of bad organization.
The real structure:
Five simple TAM settings × two moods, plus one compound rule, plus five families of irregularity.
Every finite Spanish verb parses as:
- Root — carries the meaning
- Theme vowel — declares conjugation class: -a- (hablar), -e- (comer), -i- (vivir)
- TAM — tense/aspect/mood
- Person/number — who
The theme vowel is only a class declaration — it carries no meaning. "Three conjugations" means "three declension patterns," nothing more. And the endings fuse TAM with person inseparably (Vol 00 §6): -áramos is imperfect-subjunctive-first-plural as one indivisible unit. You cannot decompose it further, which is what makes Spanish fusional rather than agglutinative like Turkish.
2The five simple settings frequency 3 of 3, daily
Indicative, using hablar / comer / vivir and the rioplatense person set:
| Present | Preterite | Imperfect | Future | Conditional | |
|---|---|---|---|---|---|
| yo | hablo | hablé | hablaba | hablaré | hablaría |
| vos | hablás | hablaste | hablabas | hablarás | hablarías |
| él/ella | habla | habló | hablaba | hablará | hablaría |
| nosotros | hablamos | hablamos | hablábamos | hablaremos | hablaríamos |
| ustedes/ellos | hablan | hablaron | hablaban | hablarán | hablarían |
| Present | Preterite | Imperfect | |
|---|---|---|---|
| yo | como / vivo | comí / viví | comía / vivía |
| vos | comés / vivís | comiste / viviste | comías / vivías |
| él/ella | come / vive | comió / vivió | comía / vivía |
| nosotros | comemos / vivimos | comimos / vivimos | comíamos / vivíamos |
| ustedes/ellos | comen / viven | comieron / vivieron | comían / vivían |
Three structural observations worth more than the tables:
The accent is load-bearing frequency 3 of 3, daily. Hablo (I speak) vs habló (he spoke). Hable (subjunctive) vs hablé (preterite). One written accent flips person and tense and mood. This is not decoration — it is the morphology. Mis-stress a verb and you have said a different word, not the same word badly.
-er and -ir merge almost completely frequency 2 of 3, secondary. Compare the columns: comer and vivir differ only in the present-tense nosotros (comemos/vivimos) and vos (comés/vivís). Everywhere else they're identical. So the real count is closer to two and a half conjugations, not three.
Future and conditional are built on the infinitive frequency 3 of 3, daily. Not on the root — on the whole infinitive: hablar + é, comer + ía, vivir + ás. ⟹ Because they're historical fusions of infinitive + haber: medieval hablar he ("I have to speak") became hablaré. That's why their endings look like haber conjugated (he, has, ha → -é, -ás, -á) and why the irregular stems in §4.5 are contractions of the infinitive, not of the root. Vol 00 §13's grammaticalization story, visible inside a paradigm.
3The compound rule — one rule, seven "tenses" frequency 3 of 3, daily
haber conjugated in any setting + invariable past participle.
| haber setting | Compound | Example |
|---|---|---|
| present (he, has, ha, hemos, han) | pretérito perfecto | he hablado |
| imperfect (había…) | pluscuamperfecto | había hablado |
| preterite (hube…) | frequency 1 of 3, rare pretérito anterior — nearly extinct | hube hablado |
| future (habré…) | futuro perfecto | habré hablado |
| conditional (habría…) | condicional perfecto | habría hablado |
| present subjunctive (haya…) | perfecto de subjuntivo | haya hablado |
| imperfect subjunctive (hubiera…) | pluscuamperfecto de subjuntivo | hubiera hablado |
Participle formation: -ar → -ado, -er/-ir → -ido. Irregulars in 10 §4.
Rioplatense frequency note frequency 3 of 3, daily. Buenos Aires uses he hablado far less than Spain does. Hoy comí is normal where Madrid says hoy he comido. But había hablado (pluperfect) is fully alive and frequent. So: learn the compound rule, use había freely, and let the present perfect stay rare. Details in 06 §5.
4Irregularity as five families frequency 3 of 3, daily
This is where conventional grammars lose people — they print a list of two hundred verbs. Almost all of it resolves into five patterns.
4.1Family 1 — stem-changing (the "boot") frequency 3 of 3, daily
The stressed stem vowel diphthongizes. Three patterns:
| Change | Verbs | Present forms |
|---|---|---|
| e → ie | pensar, querer, empezar, entender, sentir, preferir, cerrar | pienso, pensás, piensa, pensamos, piensan |
| o → ue | poder, dormir, volver, contar, encontrar, recordar, costar | puedo, podés, puede, podemos, pueden |
| e → i | pedir, decir, servir, seguir, repetir, vestir | pido, pedís, pide, pedimos, piden |
| u → ue | jugar (only) | juego, jugás, juega, jugamos, juegan |
| tú (general) | vos (RP) |
|---|---|
| tú piensas | vos pensás |
| tú puedes | vos podés |
| tú quieres | vos querés |
| tú duermes | vos dormís |
| tú pides | vos pedís |
4.2Family 2 — irregular yo only frequency 3 of 3, daily
2 known defectsdata error — caber→**cabo**→**cabo**⊘ *(cabo)* Actually: The irregular yo of caber is QUEPO. The cell is corrupt and repeats the wrong form three times.. Probably: Load-bearing: §6 derives the entire present subjunctive from the yo form, so this cell would generate *caba instead of quepa..diagram defect — Family 2 — irregular yo only Actually: The misc row's caber entry is garbled and duplicated — 'caber→**cabo**→**cabo**⊘ *(cabo)*' repeats the same form three times, and the form itself is wrong: the irregular yo of caber is quepo, which is also why caber belongs in this -zco-like list at all.. (not re-checked against the source file)The first-person singular is irregular; everything else is regular.
| Pattern | Verbs |
|---|---|
| -go | tener→tengo, poner→pongo, salir→salgo, venir→vengo, hacer→hago, decir→digo, traer→traigo, caer→caigo, oír→oigo, valer→valgo |
| -zco | conocer→conozco, parecer→parezco, producir→produzco, traducir→traduzco, conducir→conduzco |
| -oy | dar→doy, estar→estoy, ir→voy, ser→soy |
| misc | saber→sé, ver→veo, caber→quepo, haber→he |
Several of these also stem-change on top (tener: tengo, tenés, tiene — irregular yo and e→ie).
4.3Family 3 — orthographic adjustments frequency 2 of 3, secondary
Not irregular at all: the sound stays constant and the spelling must change to preserve it. Spanish orthography forbids certain letter-vowel combinations.
| Change | Before | Example |
|---|---|---|
| c → qu | e, i | buscar → busqué |
| g → gu | e, i | llegar → llegué, pagar → pagué |
| z → c | e, i | empezar → empecé, comenzar → comencé |
| gu → gü | e, i | averiguar → averigüé |
| g → j | a, o | escoger → escojo, dirigir → dirijo |
| c → z | a, o | vencer → venzo, convencer → convenzo |
| i → y | between vowels | leer → leyó, creer → creyó, caer → cayó, oír → oyó |
| i absorbed | after ñ, ll | bullir → bulló, gruñir → gruñó |
4.4Family 4 — strong preterites frequency 3 of 3, daily
known defectdiagram defect — Family 4 — strong preterites Actually: The 'vos/él' column packs two person cells into one string, and for decir, traer and conducir the second slot holds the third-person-PLURAL form (dijeron, trajeron, condujeron) instead of the él form the header promises (dijo, trajo, condujo); a reader following the column header would take dijeron as the singular.. (not re-checked against the source file)About twenty high-frequency verbs have a completely different preterite stem — and, uniquely, unstressed endings.
| Verb | Stem | yo | vos/él |
|---|---|---|---|
| estar | estuv- | estuve | estuviste / estuvo |
| tener | tuv- | tuve | tuviste / tuvo |
| andar | anduv- | anduve | anduviste / anduvo |
| poder | pud- | pude | pudiste / pudo |
| poner | pus- | puse | pusiste / puso |
| saber | sup- | supe | supiste / supo |
| querer | quis- | quise | quisiste / quiso |
| hacer | hic- | hice | hiciste / hizo ⚠ |
| venir | vin- | vine | viniste / vino |
| decir | dij- | dije | dijiste / dijeron ⚠ |
| traer | traj- | traje | trajiste / trajeron ⚠ |
| conducir | conduj- | conduje | condujiste / condujeron |
| caber | cup- | cupe | cupiste / cupo |
| haber | hub- | hube | hubiste / hubo |
And the two fully irregular ones frequency 3 of 3, daily:
| ser / ir (identical!) | dar | ver | |
|---|---|---|---|
| yo | fui | di | vi |
| vos | fuiste | diste | viste |
| él | fue | dio | vio |
| nosotros | fuimos | dimos | vimos |
| ellos | fueron | dieron | vieron |
4.5Family 5 — contracted future/conditional stems frequency 2 of 3, secondary
Twelve verbs contract the infinitive before adding future/conditional endings. Same stem serves both.
| Verb | Stem | Future | Conditional |
|---|---|---|---|
| tener | tendr- | tendré | tendría |
| poner | pondr- | pondré | pondría |
| venir | vendr- | vendré | vendría |
| salir | saldr- | saldré | saldría |
| poder | podr- | podré | podría |
| saber | sabr- | sabré | sabría |
| haber | habr- | habré | habría |
| caber | cabr- | cabré | cabría |
| querer | querr- | querré | querría |
| hacer | har- | haré | haría |
| decir | dir- | diré | diría |
| valer | valdr- | valdré | valdría |
4.6The -ir vowel raise frequency 1 of 3, rare
Third-conjugation stem-changers raise the vowel in third-person preterite and in the gerundio:
dormir → *durmió, durmieron, durmiendo pedir → *pidió, pidieron, pidiendo sentir → *sintió, sintieron, sintiendo***
Also affects the imperfect subjunctive (built from third-plural preterite, 07 §2): durmiera, pidiera, sintiera.
5ser, estar, ir, haber — the four you can't derive frequency 3 of 3, daily
Genuinely irregular throughout. Worth a table because they're the highest-frequency verbs in the language.
| ser | estar | ir | haber | |
|---|---|---|---|---|
| Present | ||||
| yo | soy | estoy | voy | he |
| vos | sos | estás | vas | has |
| él | es | está | va | ha / hay |
| nosotros | somos | estamos | vamos | hemos |
| ellos | son | están | van | han |
| Preterite | fui | estuve | fui | hube |
| Imperfect | era | estaba | iba | había |
| Future | seré | estaré | iré | habré |
| Pres. subj. | sea | esté | vaya | haya |
| Imp. subj. | fuera | estuviera | fuera | hubiera |
| Imperative (vos) | sé | está | andá ⚠ | — |
6The subjunctive forms frequency 3 of 3, daily
Full syntax in 07. Morphology here.
Present subjunctive: take the yo form, drop the -o, apply the opposite theme vowel.
| Verb | yo | Subjunctive |
|---|---|---|
| hablar | hablo | hable, hables, hable, hablemos, hablen |
| comer | como | coma, comas, coma, comamos, coman |
| tener | tengo | tenga, tengas, tenga, tengamos, tengan |
| conocer | conozco | conozca… |
| decir | digo | diga… |
| salir | salgo | salga… |
Imperfect subjunctive: take third-person-plural preterite, drop -ron, add -ra (or -se).
| Verb | 3pl preterite | Imperfect subjunctive |
|---|---|---|
| hablar | hablaron | hablara / hablase |
| tener | tuvieron | tuviera / tuviese |
| ser/ir | fueron | fuera / fuese |
| poder | pudieron | pudiera / pudiese |
| decir | dijeron | dijera / dijese |
The -ra / -se pair: fully interchangeable in meaning. -ra dominates in Latin America; -se sounds more Peninsular or literary. Use -ra.
Future subjunctive frequency 1 of 3, rare — extinct. Survives only in legal formulae (sea lo que fuere) and proverbs. Portuguese kept it alive (Vol 02 §4.1); Spanish buried it. Recognize, never produce.
7Voseo morphology — complete frequency 3 of 3, daily
The full specification, because this is your dialect and most references treat it as a footnote.
7.1Where vos has its own forms — only two places
Present indicative. Drop the -r from the infinitive, add an accented ending:
| Infinitive | vos form | Rule |
|---|---|---|
| hablar | hablás | -ar → -ás |
| comer | comés | -er → -és |
| vivir | vivís | -ir → -ís |
| tener | tenés | no diphthong |
| poder | podés | no diphthong |
| querer | querés | no diphthong |
| decir | decís | no vowel raise |
| ser | sos | ⊘ the one irregular |
Affirmative imperative. Drop the -r, accent the final vowel:
| Infinitive | vos imperative |
|---|---|
| hablar | hablá |
| comer | comé |
| venir | vení |
| decir | decí |
| tener | tené |
| poner | poné |
| salir | salí |
| hacer | hacé |
| mirar | mirá |
| dar | dá |
| ir | andá ⚠ (from andar) |
| ser | sé |
7.2Where vos borrows the tú forms — everywhere else
| Tense | vos form | Note |
|---|---|---|
| Preterite | vos hablaste | Standard. hablastes is heard but stigmatized |
| Imperfect | vos hablabas | |
| Future | vos hablarás | |
| Conditional | vos hablarías | |
| Present subjunctive | que vos hables | See below ⚠ |
| Imperfect subjunctive | que vos hablaras | |
| Compound | vos has hablado |
| Form | Status |
|---|---|
| No hables. | The educated/written norm in Argentina |
| No hablés. | Very common in speech, final-stressed, fully Argentine |
Both are heard constantly in Buenos Aires. No hables is safer in writing and formal speech; no hablés is authentically porteño in conversation. Neither will cause a problem. Same for subjunctive after que: que vengas (norm) / que vengás (colloquial).
7.3What vos does not have
- No possessive of its own — uses tu/tus (02 §6.1)
- No object pronoun of its own — uses te
- No fused prepositional forms — con vos, para vos, never contigo/ti (03 §6)
8Traps
9Cross-references
- What the preterite/imperfect contrast means06 §1
- When each mood is required**07**
- The imperative system in full, including usted and nosotros07 §8
- Participles and gerundios as forms**10**
- Voseo's social meaning12 §2