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4.3 Essential Irregular & Stem-Changing Verbs

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DELE A1 Study Guide Exam

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1 Introduction, Exam Architecture & Scoring

1.1 About the DELE A1 Exam: Purpose, CEFR Level & Registration 1.2 Exam Architecture: Four Pruebas & Two-Group Scoring System 1.3 Strategic Preparation: Study Schedule, Time Management & Exam Traps

2 Prueba 1: Comprensión de Lectura (Reading Comprehension)

2.1 Reading Tarea 1: One Personal Email or Postcard (5 Questions) 2.2 Reading Tarea 2: Notes, Signs & Short Notices (Match 6 Sentences to 9 Texts) 2.3 Reading Tarea 3: Matching People's Needs to Short Ads (6 of 9) 2.4 Reading Tarea 4: Extracting Details from One Informational Text (8 Questions)

3 Prueba 2: Comprensión Auditiva (Listening Comprehension)

3.1 Listening Tarea 1: Short Interpersonal Dialogues & Graphic Selection 3.2 Listening Tarea 2: Short Messages & Announcements Matched to Pictures 3.3 Listening Tarea 3: Eight Statements from One Monologue (Matching Beginnings and Endings) 3.4 Listening Tarea 4: One Conversation, Seven Sentences to Complete

4 Core Grammar I: Essential Verbs & Foundations

4.1 Subject Pronouns & Regular Present Tense (-ar, -er, -ir) 4.2 Ser vs. Estar: Permanent Identity vs. Temporary States & Locations 4.3 Essential Irregular & Stem-Changing Verbs 4.4 Reflexive Verbs, Daily Routines & Time Sequencing

5 Core Grammar II: Nouns, Modifiers & Structures

5.1 Gender, Number, Articles & Noun-Adjective Agreement 5.2 Expressing Likes & Preferences: Gustar, Encantar, Interesar & Parecer 5.3 Question Words, Demonstratives & Possessive Adjectives 5.4 High-Yield Verbal Periphrases: Ir a + Infinitivo, Tener que + Infinitivo, Estar + Gerundio

6 Essential Vocabulary: Numbers, Time & Daily Life

6.1 Cardinal Numbers (0–1,000), Telling Time, Calendar & Weather 6.2 Personal Data, Nationalities, Family Members & Descriptions 6.3 The Home, Furniture, Rooms & Spatial Prepositions

7 Situational Vocabulary: Shopping, Travel, Health, Work & Free Time

7.1 Food, Market Shopping, Restaurant Orders & Asking Prices 7.2 City Navigation, Public Transport & Asking for/Giving Directions 7.3 Physical Well-Being, Body Parts, Doctor Visits & Pharmacy Purchases 7.4 Studies, Work, Free Time & Communication

8 Prueba 3: Expresión e Interacción Escritas (Written Expression & Interaction)

8.1 Writing Tarea 1: Personal Data Form Completion & Questionnaires 8.2 Writing Tarea 2: Short Epistolary Texts (Emails, Postcards, Messages & Ads, 30–40 Words) 8.3 Writing Scales, Essential Connectors & Common Spelling Errors

9 Prueba 4: Expresión e Interacción Orales (Oral Expression & Interaction)

9.1 Oral Tarea 1: Personal Presentation (1–2 Minute Monologue) 9.2 Oral Tarea 2: Exposición de un tema (2–3 Minute Talk on a Topic) 9.3 Oral Tarea 3: Conversation with the Interviewer (and Your Two Questions) 9.4 Oral Scoring Scales, Pronunciation & Communication Repair

4.3 Essential Irregular & Stem-Changing Verbs

Key Takeaways Explain This Topic AI

Stem-changing (diphthongizing) verbs alter their root vowel in all singular persons and third-person plural (yo, tú, él, ellos) where stress falls on the stem, but retain their regular infinitive root in nosotros/as and vosotros/as.

A critical sub-group of everyday verbs ('yo-go' verbs) features an irregular first-person singular ending in -go (hago, pongo, salgo, tengo, vengo) while conjugating predictably in remaining persons.

The verb ir (voy, vas, va, vamos, vais, van) is fully irregular, while dar is irregular only in the yo form (doy) and otherwise follows the -ar pattern (das, da, damos, dais, dan).

The verb tener combines a 'yo-go' first person (tengo) with an e -> ie stem change (tienes, tiene, tienen) and governs essential idiomatic formulas for age, physiological states, and obligations (tener que + inf).

Learners must never apply stem changes to the nosotros and vosotros forms (queremos, podéis), adhering strictly to the visual 'boot rule'.

Last updated: October 2026

4.3 Essential Irregular & Stem-Changing Verbs

While regular verbs provide predictable patterns, everyday spoken and written Spanish relies heavily on irregular verbs ( verbos irregulares ). These verbs appear in almost every basic conversational exchange: expressing desires ( querer ), making plans ( ir ), stating obligations ( tener que ), describing leisure activities ( hacer , salir ), and ordering in restaurants ( pedir ).

Rather than viewing irregular verbs as chaotic exceptions, it helps to organise them into predictable patterns: first-person irregulars ("yo-go" verbs) , stem-changing verbs ("boot verbs") , and two key irregulars, ir and dar .

Note

The Instituto Cervantes Niveles de referencia list only ser , estar , haber and ir as irregular presents at A1 and place the frequent vowel and consonant changes at A2. You will still meet forms such as quiero , puedo , tengo que and vamos a in A1 exam texts (all appear in the Modelo 0), so learn to recognise them and to use the most frequent ones.

The "Yo-Go" Verbs (First-Person Irregulars)

A significant group of high-frequency Spanish verbs features an irregular ending in -go exclusively in the first-person singular ( yo ). Across all other grammatical persons, they follow standard regular endings according to their infinitive class.

1. Pure "Yo-Go" Verbs

These verbs maintain a completely regular stem for tú , él , nosotros , vosotros , and ellos :

  • Hacer (to do / to make) → yo hago , tú haces, él hace, nosotros hacemos, vosotros hacéis, ellos hacen
  • Poner (to put / to place) → yo pongo , tú pones, él pone, nosotros ponemos, vosotros ponéis, ellos ponen
  • Salir (to leave / to go out) → yo salgo , tú sales, él sale, nosotros salimos, vosotros salís, ellos salen
  • Traer (to bring) → yo traigo , tú traes, él trae, nosotros traemos, vosotros traéis, ellos traen
  • Oír (to hear) → yo oigo , tú oyes, él oye, nosotros oímos, vosotros oís, ellos oyen
  • 2. Hybrid "Yo-Go" + Stem-Changing Verbs

Two of the most essential verbs in Spanish combine a -go ending in the yo form with a stem vowel change in the other singular forms and third-person plural:

  • Tener (to have) → yo tengo , tú t ie nes, él t ie ne, nosotros tenemos, vosotros tenéis, ellos t ie nen
  • Venir (to come) → yo vengo , tú v ie nes, él v ie ne, nosotros venimos, vosotros venís, ellos v ie nen
  • Comparative Table: Essential "Yo-Go" Conjugations
  • Person Hacer Poner Salir Tener Venir
  • yo hago pongo salgo tengo vengo
  • tú haces pones sales tienes vienes
  • él / ella / usted hace pone sale tiene viene
  • nosotros / nosotras hacemos ponemos salimos tenemos venimos
  • vosotros / vosotras hacéis ponéis salís tenéis venís
  • ellos / ellas / ustedes hacen ponen salen tienen vienen
  • Practical Communicative Examples
  • Los fines de semana salgo con mis amigos a cenar. (On weekends I go out with my friends for dinner.)
  • Siempre hago los deberes por la tarde. (I always do my homework in the afternoon.)
  • ¿A qué hora vienes a mi casa mañana? (What time are you coming to my house tomorrow?)
  • Stem-Changing Verbs: The "Boot" Rule ( Verbos con Cambio Vocálico )

Stem-changing verbs alter the vowel of their root stem when conjugated. This change is phonetic: when the spoken accent (stress) falls directly upon the stem, the single vowel broadens into a diphthong ( ie or ue ) or raises ( e to i ).

The "Boot" Rule ( La Regla de la Bota )

When you diagram the six persons of a Spanish conjugation table, the forms that undergo the vowel shift resemble a boot:

Inside the Boot (Stem Changes) : yo , tú , él/ella/usted , ellos/ellas/ustedes . The stress falls directly on the stem root.

Outside the Boot (NO Stem Change) : nosotros/as and vosotros/as . The stress shifts forward onto the inflectional ending ( -amos, -emos, -imos ), preserving the original infinitive vowel. Conjugation Matrix: The "Boot"

  • ┌────────────────────────┬────────────────────────┐
  • │ yo: QUIER-O ★ │ nosotros: QUER-EMOS │ <-- (Outside boot: regular stem)
  • │ tú: QUIER-ES ★ │ vosotros: QUER-ÉIS │ <-- (Outside boot: regular stem)
  • │ él: QUIER-E ★ │ │
  • │ ellos: QUIER-EN ★ │ │
  • └────────────────────────┴────────────────────────┘
  • (★ Forms inside the boot undergo vowel shift)
  • Class 1: Stem Change e → ie

Verb Meaning yo tú él/ella/Ud. nosotros/as vosotros/as ellos/as/Uds.

  • Querer to want / love quiero quieres quiere queremos queréis quieren
  • Preferir to prefer prefiero prefieres prefiere preferimos preferís prefieren
  • Empezar to start / begin empiezo empiezas empieza empezamos empezáis empiezan
  • Entender to understand entiendo entiendes entiende entendemos entendéis entienden
  • Cerrar to close cierro cierras cierra cerramos cerráis cierran
  • ¿ Quieres tomar un café con nosotros? (Do you want to have a coffee with us?)
  • La clase de español empieza a las nueve en punto. (The Spanish class begins at nine o'clock sharp.)
  • Nosotros preferimos viajar en tren porque es más rápido. (We prefer traveling by train because it is faster.)
  • Class 2: Stem Change o → ue (and u → ue)

Verb Meaning yo tú él/ella/Ud. nosotros/as vosotros/as ellos/as/Uds.

  • Poder can / to be able puedo puedes puede podemos podéis pueden
  • Dormir to sleep duermo duermes duerme dormimos dormís duermen
  • Volver to return vuelvo vuelves vuelve volvemos volvéis vuelven
  • Almorzar to eat lunch almuerzo almuerzas almuerza almorzamos almorzáis almuerzan
  • Costar to cost cuesto cuestas cuesta costamos costáis cuestan
  • Jugar ( u → ue ) to play (games/sports) juego juegas juega jugamos jugáis juegan
  • ¿ Puedes repetir la pregunta, por favor? (Can you repeat the question, please? — Essential for DELE Prueba 4!)
  • ¿Cuánto cuestan estas manzanas? (How much do these apples cost?)
  • Los domingos dormimos hasta las diez de la mañana. (On Sundays we sleep until ten in the morning.)
  • Class 3: Stem Change e → i

This vowel-raising pattern occurs exclusively in certain -ir verbs:

Verb Meaning yo tú él/ella/Ud. nosotros/as vosotros/as ellos/as/Uds.

  • Pedir to ask for / order pido pides pide pedimos pedís piden
  • Servir to serve sirvo sirves sirve servimos servís sirven
  • Vestir to dress visto vistes viste vestimos vestís visten
  • Repetir to repeat repito repites repite repetimos repetís repiten

En el restaurante siempre pido pescado blanco y ensalada. (In the restaurant I always order white fish and salad.)

  • El camarero sirve la comida con amabilidad. (The waiter serves the food kindly.)
  • Two More Essential Irregulars: IR and DAR

These two verbs do not follow the stem-change patterns above. Ir must be memorised as a complete set; dar is irregular only in the yo form.

1. The Verb IR (To Go)

The verb ir is fully irregular: its present forms look nothing like the infinitive.

  • voy , vas , va , vamos , vais , van
  • Crucial Structures with IR

Physical Movement : Ir a + destination . When followed by the masculine article el , the preposition and article contract into al ( a + el = al ):

  • Voy al supermercado. (I am going to the supermarket.)
  • Vamos a la playa. (We are going to the beach.)

The Periphrastic Future (Immediate Plans) : Ir a + infinitivo :

  • Mañana voy a estudiar para el DELE. (Tomorrow I am going to study for the DELE.)
  • ¿Qué vas a hacer este fin de semana? (What are you going to do this weekend?)
  • 2. The Verb DAR (To Give)
  • doy , das , da , damos , dais , dan

Only doy is irregular; note also that dais has no written accent because it has a single syllable.

  • Te doy mi número de teléfono. (I give you my telephone number.)
  • Los profesores dan explicaciones claras. (The teachers give clear explanations.)

Common Idiom: Dar un paseo → Por las tardes doy un paseo por el parque. (In the afternoons I take a walk in the park.)

Fixed Idiomatic Expressions with TENER

In Spanish, many physical conditions, physiological sensations, and obligations that English expresses with the verb "to be" are expressed using tener + noun :

  • Spanish Formula with TENER English Equivalent Example Sentence
  • Tener ... años To be ... years old Tengo veinticinco años. (Never Soy 25 años !)

Tener hambre To be hungry Tengo mucha hambre; quiero almorzar.

Tener sed To be thirsty ¿Tienes sed? Hay agua en la nevera.

Tener calor To be hot / feel warm En verano tenemos mucho calor en Sevilla.

Tener frío To be cold / feel chilly Tengo frío; por favor, cierra la ventana.

Tener sueño To be sleepy / tired Los niños tienen mucho sueño por la noche.

Tener miedo (de / a) To be afraid of Mi hija pequeña tiene miedo a la oscuridad.

Tener prisa To be in a hurry Lo siento, no puedo hablar; tengo prisa.

Tener razón To be right / correct Usted tiene razón en su comentario.

Tip

Because the sensations following tener are nouns ( hambre, sed, calor, frío ), they are modified by the adjective mucho / mucha , never the adverb muy : say Tengo mucho calor or Tengo mucha hambre (not Tengo muy calor ).

Expressing Obligation: Tener que + Infinitivo

The formula tener que + infinitivo is the most common way to express duty or necessity at Level A1:

  • Tengo que estudiar para el examen de mañana. (I have to study for tomorrow's exam.)
  • ¿ Tienes que trabajar el sábado? (Do you have to work on Saturday?)