Irregular Spanish Gerunds: 'y', 'i', and 'u' Forms (leyendo, pidiendo, durmiendo)
Grammar Rule in 30 Seconds
When a verb stem ends in a vowel, the gerund ending '-iendo' changes to '-yendo' to avoid triple vowels.
- Vowel-stem verbs (leer, traer) change -iendo to -yendo: leyendo, trayendo.
- Stem-changing -ir verbs (pedir, dormir) change the stem vowel: pidiendo, durmiendo.
- If the stem ends in a consonant, use standard -ando or -iendo.
Overview
Spanish gerunds, equivalent to English -ing forms, describe actions in progress. While most verbs form their gerunds predictably (-ando for -ar verbs, -iendo for -er/-ir verbs), a significant group of -er and -ir verbs exhibit irregularities. These irregular gerunds are crucial for conveying nuanced meaning, particularly when forming the present progressive tense.
Understanding their formation is essential for clear communication, as incorrect forms can sound unnatural or impede comprehension. This section explains the three primary types of irregular gerunds: those ending in -yendo, those with an e to i stem change, and those with an o to u stem change. These irregularities stem primarily from phonological rules governing vowel sequences and historical verb conjugations, aiming for a more fluid pronunciation in spoken Spanish.
Mastery of these forms is a hallmark of an A2 level learner progressing towards greater fluency.
How This Grammar Works
-yendo ending, occurs when the stem of an -er or -ir verb ends in a vowel. In Spanish, it is generally phonologically awkward to have three vowels in sequence, specifically an i between two other vowels.leer (to read) would theoretically form le-iendo. To resolve this vowel clash, the i of -iendo transforms into a y, resulting in leyendo. This y acts as a semivowel, smoothing the transition between the adjacent vowels and making pronunciation more natural.-er and -ir verbs where the stem ends in a vowel, such as oír becoming oyendo (o-iendo avoided).-ir verbs. Many -ir verbs undergo stem changes in their present tense conjugations (e.g., dormir → duermo). These stem changes often carry over into the gerund form, though sometimes in a reduced or altered manner.e to ie or e to i stem change in the present tense often simplify to an e to i change in the gerund. For example, pedir (to ask/order), which becomes pido (e>i) in the present tense, forms pidiendo in the gerund. Similarly, verbs with an o to ue stem change in the present tense (dormir → duermo) often transform the o to u in the gerund, leading to durmiendo.ie, ue) to single vowels (i, u) in the gerund maintains the stem-changing characteristic while streamlining pronunciation. These specific changes are rooted in the historical evolution of Latin verbs into Spanish and are consistent patterns within the language's morphology. The verb ir (to go) is an anomaly, directly forming yendo due to its extremely short stem and high-frequency usage.Formation Pattern
y Rule (Vowel Stems):
-er and -ir verbs where, after removing the infinitive ending, the stem concludes with a vowel. In these cases, the i of the standard -iendo ending changes to a y to avoid a three-vowel sequence.
leer | le- | le-iendo | leyendo | reading |
creer | cre- | cre-iendo | creyendo | believing |
oír | o- | o-iendo | oyendo | hearing |
traer | tra- | tra-iendo | trayendo | bringing |
Ella está leyendo un libro en el parque. (She is reading a book in the park.)
¿Están ustedes oyendo esa música? (Are you all hearing that music?)
i Rule (Stem-changing -ir verbs: e → ie or e → i):
-ir verbs that exhibit an e to ie or e to i stem change in their present tense conjugations. In the gerund form, this change consistently simplifies to an e to i transformation in the stem.
pedir | e → i (pido) | pidiendo | asking/ordering|
servir | e → i (sirvo) | sirviendo | serving |
decir | e → i (digo) | diciendo | saying/telling |
sentir | e → ie (siento) | sintiendo | feeling |
preferir | e → ie (prefiero) | prefiriendo | preferring |
Él está pidiendo café con leche. (He is ordering coffee with milk.)
Estamos sintiendo el frío de la noche. (We are feeling the cold of the night.)
u Rule (Stem-changing -ir verbs: o → ue):
-ir verbs that undergo an o to ue stem change in their present tense conjugations. For the gerund, this change simplifies to an o to u transformation in the stem.
dormir | o → ue (duermo) | durmiendo | sleeping |
morir | o → ue (muero) | muriendo | dying |
Los niños están durmiendo profundamente. (The children are sleeping soundly.)
La planta se está muriendo sin agua. (The plant is dying without water.)
ir:
ir (to go) is a unique and highly irregular case. Its gerund form is yendo.
Estamos yendo a la playa. (We are going to the beach.)
Conjugation Table
| Infinitive | Stem Characteristic / Rule | Irregular Gerund | English Translation | ||
|---|---|---|---|---|---|
| :------------- | :--------------------------- | :----------------- | :-------------------- | ||
leer |
Vowel Stem (e) / y Rule |
leyendo |
reading | ||
creer |
Vowel Stem (e) / y Rule |
creyendo |
believing | ||
oír |
Vowel Stem (o) / y Rule |
oyendo |
hearing | ||
traer |
Vowel Stem (a) / y Rule |
trayendo |
bringing | ||
destruir |
Vowel Stem (u) / y Rule |
destruyendo |
destroying | ||
incluir |
Vowel Stem (u) / y Rule |
incluyendo |
including | ||
ir |
Unique Irregular | yendo |
going | ||
pedir |
e → i stem-change |
pidiendo |
asking/ordering | ||
servir |
e → i stem-change |
sirviendo |
serving | ||
decir |
e → i stem-change |
diciendo |
saying/telling | ||
sentir |
e → i stem-change |
sintiendo |
feeling | ||
mentir |
e → i stem-change |
mintiendo |
lying | ||
preferir |
e → i stem-change |
prefiriendo |
preferring | ||
seguir |
e → i stem-change |
siguiendo |
following/continuing | ||
conseguir |
e → i stem-change |
consiguiendo |
getting/achieving | ||
vestir |
e → i stem-change |
vistiendo |
dressing | ||
corregir |
e → i stem-change |
corrigiendo |
correcting | ||
dormir |
o → u stem-change |
durmiendo |
sleeping | ||
morir |
o → u stem-change |
muriendo |
dying | ||
poder |
o → u stem-change (-er exception) |
pudiendo |
being able to |
When To Use It
estar (to be) + gerund.- To describe an action happening right now: This is the most direct use.
Estoy oyendo una canción nueva.(I am hearing a new song right now.)¿Qué estás haciendo?(What are you doing?) The emphasis is on the immediacy and continuity of the action.
- With
seguirorcontinuarto indicate an ongoing action: When combined withseguir(to continue) orcontinuar(to continue), the gerund emphasizes the persistence of an action.Aunque es difícil, sigo creyendo en su potencial.(Although it's difficult, I keep believing in his potential.)Ellos continúan pidiendo más detalles.(They continue asking for more details.) This structure implies an action that began in the past and is still ongoing.
- With
irto express gradual progression: The combination ofir(to go, usually conjugated in the present tense) + gerund denotes an action that is happening little by little, or progressively over time.Poco a poco, voy entendiendo el concepto.(Little by little, I am understanding the concept.) This construction highlights a steady advancement rather than an immediate, singular event. It suggests development or learning.
- With
venirto describe an action that has been happening up to the present: The structurevenir(to come, conjugated) + gerund signifies an action that has been occurring for a period leading up to the current moment.He estado viendo este programa desde hace meses.(I have been watching this show for months.) More colloquially,Vengo diciéndote esto desde el principio.(I've been telling you this from the beginning.) This use is less common with irregular gerunds at the A2 level but important for understanding ongoing actions.
When Not To Use It
-ing forms. Incorrect usage is a common error for English speakers. Avoid using gerunds in the following contexts:- As a noun (subject or object): Unlike English, where
-ingforms can function as nouns (e.g., "Reading is fun"), Spanish gerunds cannot. For this, you must use the infinitive form of the verb.Leer es divertido.(Reading is fun.)No me gusta dormir mucho.(I don't like sleeping much.) UsingLeyendo es divertidoorNo me gusta durmiendois grammatically incorrect and will sound jarring to native speakers.
- As an adjective: Spanish gerunds cannot directly modify nouns. English uses participles like "the sleeping child" or "a burning house." In Spanish, you would use a relative clause, an adjective, or a different construction. For "the sleeping child," you would say
el niño que está durmiendoorel niño dormido(the sleeping child, using a past participle as an adjective).No es una casa ardiendo, butuna casa que está ardiendo(a burning house).
- To indicate future actions (without
ir aor specific time context): While English can say "I'm going tomorrow," a direct translation using the gerund in Spanish (Estoy yendo mañana) is incorrect. For future plans, Spanish primarily uses the simple present tense or their a + infinitiveconstruction.Voy a ir mañanaorMañana voy.(I'm going tomorrow.) The gerund, particularly withestar, strongly anchors the action to the present moment. Usingestar + gerundfor future actions is only natural when describing an event in progress that also happens to be in the immediate future, which is rare.
- In commands: Gerunds cannot be used to form commands. For commands, the imperative mood is required. For example, to tell someone to "Keep reading!" you would use
¡Sigue leyendo!(withseguirconjugated in the imperative) not¡Leyendo!
Common Mistakes
leiendo, creiendo): This is perhaps the most common mistake for the y rule. When a verb stem ends in a vowel (e.g., le-, cre-), learners often incorrectly form the gerund by simply adding -iendo, resulting in an awkward e-i-e vowel sequence. The correct form always replaces the i of -iendo with y to avoid this phonetic clash: leyendo (not leiendo), creyendo (not creiendo). This applies universally to all verbs with vowel stems like oíroyendo, traer → trayendo, and construir → construyendo.-er Verbs (Except poder): Stem changes in gerunds (ei, o → u) are almost exclusively a feature of -ir verbs. A common error is to apply these changes to -er verbs. For instance, volver (to return) is an o → ue stem-changing -er verb in the present tense (vuelvo). Learners might incorrectly form vulviendo for its gerund. The correct form is volviendo. The only significant exception to this rule is poder (to be able to), an -er verb whose gerund pudiendo does exhibit the o → u change.- Confusing Gerunds with Infinitives: As noted in "When Not To Use It," a frequent mistake is using a gerund where an infinitive is required, particularly when functioning as a noun. For example,
Comer es necesario para vivir(Eating is necessary for living), notComiendo es necesario.... Always remember that the infinitive acts as the noun form of the verb in Spanish.
ir exception: The gerund of ir is yendo. Learners sometimes overlook this short, irregular form and attempt to create iendo or similar incorrect variations. Memorize `ir- Overgeneralizing
reírandsonreír: The verbsreír(to laugh) andsonreír(to smile) have a specific irregularity: their gerunds areriendoandsonriendo, respectively. Theein the stem changes toi, and theiof-iendois simply absorbed, not turned into aydespite the preceding vowel. This is a common point of confusion that breaks the standardyrule.
Memory Trick
To simplify the recollection of irregular gerunds, focus on these concise principles:
- "Vowel + i = y" Rule: If an -er or -ir verb's stem ends in a vowel, and you would normally add -iendo, the i becomes a y. Think of the y as a linguistic "y-bridge" that connects two vowels smoothly, preventing a crash. Visualize le + bridge + endo = leyendo. This covers leer, creer, oír, traer, construir, etc.
- "-IR Verbs Only Change Their Vowel Song" (for i and u forms): For stem-changing gerunds, remember they primarily occur with -ir verbs. Specifically:
- If the infinitive e in the stem sounds like it wants to change to i in the present tense (e.g., pedir → pido), it will be i in the gerund: pidiendo.
- If the infinitive o in the stem sounds like it wants to change to u in the present tense (e.g., dormir → duermo), it will be u in the gerund: durmiendo.
- The irregular o → u change in the gerund of poder (an -er verb) can be remembered as the "power exception", as poder means "to be able to" or "to have power." This unique case makes it stand out.
- "Ir is y-ing its way out": Just remember that ir (to go) is a unique, short verb, and its gerund is simply yendo. It's the most concise way to say "going."
These simple heuristics can help you quickly identify which type of irregularity applies and form the correct gerund without extensive memorization of each verb.
Real Conversations
Irregular gerunds are fundamental to everyday Spanish communication, appearing frequently in casual speech, social media, and informal writing. Observe how they are used by native speakers:
- Describing current actions (Present Progressive):
- Text message: ¿Qué estás haciendo? Yo estoy leyendo los nuevos mensajes. (What are you doing? I'm reading the new messages.)
- Casual conversation (Spain): Estamos yendo al centro ahora mismo, ¿quieres venir? (We're going downtown right now, do you want to come?)
- Social media caption (Latin America): Sintiendo la vibra de este lugar. (Feeling the vibe of this place.)
- Indicating continuous or persistent actions (seguir/continuar + gerund):
- Work email (informal): Sigo recibiendo tus correos, gracias por el seguimiento. (I'm still receiving your emails, thanks for the follow-up.)
- Friend lamenting: Ya es medianoche y mi vecino sigue oyendo música a todo volumen. (It's already midnight and my neighbor is still listening to loud music.)
- Expressing gradual development (ir + gerund):
- Self-reflection: Voy entendiendo mejor cómo funciona esto. (I'm gradually understanding better how this works.)
- Mentoring: Con la práctica, vas corrigiendo tus errores. (With practice, you are correcting your errors little by little.)
- Specific cultural insight: The use of ando/endo as a standalone exclamation (informal, especially in some Latin American regions): While not grammatically a complete sentence, in very casual contexts, you might hear a gerund as a short, emphatic response. For example, if someone asks ¿Qué haces? (What are you doing?), a reply might be ¡Durmiendo! (Sleeping!). This highly informal usage implies
Gerund Formation Patterns
| Infinitive | Stem | Gerund | Type |
|---|---|---|---|
|
Hablar
|
Habl-
|
Hablando
|
Regular -ar
|
|
Comer
|
Com-
|
Comiendo
|
Regular -er
|
|
Leer
|
Le-
|
Leyendo
|
Vowel-stem
|
|
Pedir
|
Pid-
|
Pidiendo
|
Stem-change -ir
|
|
Dormir
|
Durm-
|
Durmiendo
|
Stem-change -ir
|
|
Traer
|
Tra-
|
Trayendo
|
Vowel-stem
|
Meanings
The gerund is used to describe ongoing actions, usually paired with the verb 'estar'.
Progressive Action
Actions happening right now.
“Estoy comiendo.”
“Ella está durmiendo.”
Simultaneous Action
Actions occurring at the same time as the main verb.
“Entró gritando.”
“Salió corriendo.”
Reference Table
| Form | Structure | Example |
|---|---|---|
|
Affirmative
|
Estar + Gerund
|
Estoy leyendo
|
|
Negative
|
No + Estar + Gerund
|
No estoy leyendo
|
|
Question
|
¿Estar + Subject + Gerund?
|
¿Estás leyendo?
|
|
Vowel-stem
|
Stem + yendo
|
Trayendo
|
|
Stem-change
|
Stem-change + iendo
|
Pidiendo
|
|
Continuous
|
Seguir + Gerund
|
Sigo durmiendo
|
Formality Spectrum
Me encuentro leyendo un libro. (Daily activity)
Estoy leyendo un libro. (Daily activity)
Estoy leyendo un libro. (Daily activity)
Ando leyendo un libro. (Daily activity)
Gerund Decision Tree
Regular
- Hablando speaking
- Comiendo eating
Vowel-Stem
- Leyendo reading
- Trayendo bringing
Irregular -ir
- Pidiendo asking
- Durmiendo sleeping
Examples by Level
Estoy comiendo.
I am eating.
Ella está durmiendo.
She is sleeping.
Estoy leyendo.
I am reading.
Estamos hablando.
We are talking.
¿Qué estás pidiendo?
What are you ordering?
El niño está trayendo agua.
The boy is bringing water.
Ellos están sintiendo frío.
They are feeling cold.
No estoy oyendo nada.
I am not hearing anything.
Salió corriendo de la casa.
He left running from the house.
Vino diciendo la verdad.
He came saying the truth.
Están construyendo un edificio.
They are building a building.
Sigue durmiendo hasta tarde.
He keeps sleeping until late.
Se fue riendo de la situación.
He left laughing at the situation.
Están influyendo en la decisión.
They are influencing the decision.
Siguió mintiendo sobre el dinero.
He kept lying about the money.
Está sirviendo la cena ahora.
He is serving dinner now.
Cayendo en la cuenta, me di cuenta del error.
Realizing it, I noticed the error.
Están destruyendo el patrimonio histórico.
They are destroying the historical heritage.
Viene repitiendo lo mismo siempre.
He keeps repeating the same thing always.
Está vistiendo ropa de gala.
He is wearing formal clothes.
Huyendo de la realidad, se refugió en libros.
Fleeing from reality, he took refuge in books.
Está contribuyendo al desarrollo social.
He is contributing to social development.
Sigue divirtiendo a la audiencia.
He continues to amuse the audience.
Está eligiendo el mejor camino.
He is choosing the best path.
Easily Confused
English uses -ing for everything, but Spanish uses the infinitive for nouns.
English uses 'I am reading' for now, but Spanish can use simple present for general facts.
Learners forget the stem change in the gerund.
Common Mistakes
leiendo
leyendo
pediendo
pidiendo
durmiendo
durmiendo
traiendo
trayendo
dormiendo
durmiendo
sintiendo
sintiendo
creiendo
creyendo
decirando
diciendo
serviendo
sirviendo
repietendo
repitiendo
construiendo
construyendo
destruiendo
destruyendo
influendo
influyendo
Sentence Patterns
Estoy ___ un libro.
Él está ___ ayuda.
Ellos están ___ en casa.
Estoy ___ agua para todos.
Real World Usage
¿Qué estás haciendo?
Estamos pidiendo la cuenta.
Estoy durmiendo en un hostal.
Estamos construyendo el plan.
Leyendo un buen libro.
Estoy pidiendo pizza.
The 'y' Rule
No Nouns
Stem Changes
Regional Use
Smart Tips
Immediately think of adding a 'y'.
Keep the change in the gerund.
Stop! Use the infinitive.
Use the gerund without 'estar'.
Pronunciation
The 'y' sound
The 'y' in 'leyendo' sounds like a soft 'j' or 'y' in 'yes'.
Question intonation
¿Estás leyendo? ↑
Rising pitch at the end for questions.
Memorize It
Mnemonic
Vowels need 'y' to stay strong, -ir verbs keep their change all day long.
Visual Association
Imagine a 'y' acting as a bridge between two vowels that are fighting. For -ir verbs, imagine the 'e' or 'o' wearing a special hat (the stem change) that they refuse to take off even when they become gerunds.
Rhyme
If the stem ends in a vowel, use a Y, don't be foul! For -ir verbs that change their tone, keep the change when you're alone.
Story
Juan is reading (leyendo) a book. He is sleeping (durmiendo) on the couch. Suddenly, he is asking (pidiendo) for help because he is bringing (trayendo) a giant cake.
Word Web
Challenge
Write 5 sentences describing what 5 people in your house are doing right now using these irregular forms.
Cultural Notes
The use of 'ando' + gerund is very common to express ongoing states.
Progressives are used, but often the simple present is preferred for immediate future.
The 'y' sound is often pronounced with a 'sh' sound (sheísmo).
The Spanish gerund comes from the Latin gerundive and present participle.
Conversation Starters
¿Qué estás leyendo últimamente?
¿Estás durmiendo bien estos días?
¿Qué estás pidiendo en los restaurantes?
¿Estás trayendo algo para la fiesta?
Journal Prompts
Common Mistakes
Test Yourself
Estoy ___ (leer) un libro.
Ellos están ___ (pedir) ayuda.
Find and fix the mistake:
Dormiendo es bueno.
Él duerme. -> Él está ___.
Estoy trayendo comida.
A: ¿Qué haces? B: Estoy ___ (oír) música.
están / ellos / pidiendo / ayuda
Match each item on the left with its pair on the right:
Score: /8
Practice Exercises
8 exercisesEstoy ___ (leer) un libro.
Ellos están ___ (pedir) ayuda.
Find and fix the mistake:
Dormiendo es bueno.
Él duerme. -> Él está ___.
Estoy trayendo comida.
A: ¿Qué haces? B: Estoy ___ (oír) música.
están / ellos / pidiendo / ayuda
Leer, Pedir, Dormir, Traer
Score: /8
Practice Bank
10 exercisesEstamos ___ sushi para la cena.
El perro está oiendo un ruido extraño.
está / trayendo / el / camarero / la / cuenta
She is saying the truth.
Select the irregular gerund from the list:
Match the pairs:
No te estoy ___ nada de lo que dices.
Mi abuelo se está moriendo de sueño.
I am preferring the red one.
¿Quién está ___ la mesa?
Score: /10
FAQ (8)
Spanish avoids three vowels in a row. The 'y' breaks the sequence.
No, use the infinitive (e.g., 'Nadar es divertido').
Only those that have a stem change in the present tense.
No, use the simple present or 'ir a'.
It's a vowel stem, so it becomes 'trayendo'.
Yes, it keeps the o-u change.
Yes, as an adverbial modifier (e.g., 'Salió corriendo').
Similar in form, but different in usage and noun capability.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Present Continuous
English gerunds can be nouns; Spanish gerunds cannot.
Gérondif (en + participe présent)
French requires 'en'.
Present tense
German uses simple present for everything.
-te iru form
Japanese uses a particle-based system.
Active participle
Arabic is non-conjugational in this sense.
正在 (zhèngzài)
Chinese has no verb conjugation.
Learning Path
Prerequisites
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