Spanish Gerund Formation: -ando, -iendo, and Irregular Forms

Spanish gerunds are formed by removing the infinitive ending and adding -ando /anˈdando/ to -ar verbs or -iendo /ˈjendo/ to -er and -ir verbs. So hablar /aˈblaɾ/ becomes hablando /aˈblando/, comer /koˈmeɾ/ becomes comiendo /koˈmjendo/, and vivir /biˈbiɾ/ becomes viviendo /biˈbjendo/. You use these forms most often with estar /esˈtaɾ/ to say an action is in progress.

The Spanish gerund, called gerundio /xeˈɾundjo/, looks familiar to English speakers because it often translates as an English verb ending in -ing. But its job is narrower. It is not a general-purpose noun form, and using it where English uses -ing can create a sentence that sounds unnatural or incorrect.

Spanish is used by nearly 600 million potential speakers worldwide, according to Instituto Cervantes data, across 20 sovereign countries where it has official status. That reach makes grammar patterns especially valuable: the basic gerund system is shared across regions, even though everyday preferences for progressive forms can vary. Build this pattern alongside the Spanish present tense, and you will understand a large share of real conversational narration.

The core rule

The gerund has two regular endings:

The stress stays where it naturally falls in the new word. You do not need to add an accent mark to regular gerunds such as trabajando /tɾabaˈxando/ or escribiendo /eskɾiˈbjendo/.

The Real Academia Española, in the Nueva gramática de la lengua española, treats the gerund as a non-finite verb form. That means it does not change for person or number. One form works with every subject:

Only estar /esˈtaɾ/ changes. The gerund hablando /aˈblando/ remains the same.

Regular gerund formation

-ando y -iendo

For -ar verbs, use -ando /anˈdando/. This is the most straightforward pattern.

For -er and -ir verbs, use -iendo /ˈjendo/.

The final example, viven trabajando /ˈbiβen tɾabaˈxando/, does not mean they are working at this exact second. It can suggest an ongoing routine or situation, roughly “they make their living working here.” Context decides whether the activity is happening now or describes a continuing circumstance.

Spelling changes before -iendo

Some verbs need a spelling adjustment because Spanish avoids certain vowel combinations. These are predictable enough to learn as groups.

Leyendo

Verbs ending in -eer, -aer, -oír, and some -uir patterns often use y before -endo. The result is -yendo /ˈʝendo/.

For example, Estoy leyendo /esˈtoj leˈjendo/ means “I am reading,” while Está cayendo /esˈta kaˈjendo/ means “it is falling.” You may hear the latter about rain: Está cayendo mucha lluvia /esˈta kaˈjendo ˈmutʃa ˈʝuβja/, although many speakers would more naturally say Está lloviendo /esˈta ʝoˈβjendo/.

The y /ʝ/ is not decorative. It creates a pronounceable bridge between vowels. John Butt and Carmen Benjamin’s A New Reference Grammar of Modern Spanish highlights these spelling patterns as part of how Spanish maintains clear syllable structure in verb forms.

Stem-changing gerunds

Present-tense stem changes do not always carry into the gerund. The rule depends on the infinitive group.

For -ar and -er stem-changing verbs, the gerund normally keeps the regular stem:

For -ir stem-changing verbs, changes commonly appear in the gerund, but in a reduced form:

• e becomes i
• o becomes u

Notice the contrast:

• Pensando /penˈsando/ is regular, not piensando.
• Pidiendo /piˈðjendo/ changes e to i.
• Durmiendo /duɾˈmjendo/ changes o to u.

This is a frequent learner error because the infinitive can hide the stem-changing pattern. If you know pido /ˈpiðo/ and duermo /ˈdweɾmo/, connect them to pidiendo /piˈðjendo/ and durmiendo /duɾˈmjendo/ as a set.

The most important irregular gerunds

A few high-frequency verbs have forms that must be memorized. The most essential is ir /iɾ/, whose gerund is yendo /ˈʝendo/, not iendo.

The construction voy yendo /boj ˈʝendo/ is colloquial and context-sensitive. It can mean “I’m heading there” or “I’m getting going,” often when someone has been delayed. It is not simply a literal progressive equivalent of “I am going.”

Spanish dialogue makes these forms memorable because they appear in emotional scenes: someone está diciendo /esˈta diˈsjendo/ something important, se está riendo /se esˈta ˈrjendo/, or está viniendo /esˈta biˈnjendo/ to meet another character. Listening for those short bursts in films is more useful than drilling an isolated list. For a practical routine, see how to learn Spanish with movies.

Estar plus gerund

The most familiar use of the Spanish gerund is the progressive construction:

estar /esˈtaɾ/ + gerund

The verb hacer /aˈseɾ/ becomes haciendo /aˈsjendo/. That form is common enough to learn early, especially for the question ¿Qué estás haciendo? /ke esˈtas aˈsjendo/.

However, Spanish uses the simple present more often than English uses “am doing.” If a friend calls and asks ¿Qué haces? /ke ˈases/, they may simply mean “What are you doing?” right now. Both ¿Qué haces? and ¿Qué estás haciendo? are natural, but the progressive more strongly spotlights the action in progress.

Other verbs used with gerunds

Estar /esˈtaɾ/ is not the only verb that can accompany a gerund. Several verbs add a specific perspective on the action.

These are called verbal periphrases, combinations where two verbs work together as one verbal idea. The RAE’s Diccionario panhispánico de dudas advises learners to pay attention to the meaning of the first verb because it changes the nuance of the gerund.

For instance, sigo estudiando /ˈsiɣo estuˈðjando/ means “I am still studying,” while llevo estudiando dos horas /ˈʝeβo estuˈðjando ðos ˈoɾas/ means “I have been studying for two hours.” The action is similar, but the viewpoint is different.

When not to use the gerund

The biggest mistake is treating the Spanish gerund as identical to every English -ing form.

Use an infinitive for activities as nouns

English: “Reading is useful.”
Spanish: Leer es útil. /leˈeɾ es uˈtil/

Do not say Leyendo es útil /leˈjendo es uˈtil/ for this meaning. Spanish uses the infinitive leer /leˈeɾ/ as the subject of the sentence.

More examples:

Avoid a gerund for a later action

A gerund should normally be simultaneous with the main action, or explain the way it happens. This is why a sentence such as Entró en la sala, sentándose /enˈtɾo en la ˈsala senˈtandose/ can sound wrong if the sitting happened after entering.

A clearer option is:

Entró en la sala y se sentó. /enˈtɾo en la ˈsala i se senˈto/

FundéuRAE guidance regularly stresses this timing issue in editorial Spanish. The gerund works best when the actions overlap: Entró sonriendo /enˈtɾo sonˈrjendo/, “She entered smiling.” The smile accompanies the entrance.

A practical way to master Spanish gerunds

Start with ten verbs you actually use. Make three groups: regular -ando /anˈdando/ verbs, regular -iendo /ˈjendo/ verbs, and irregular or stem-changing forms.

Then create short, personal sentences:

• Estoy aprendiendo español. /esˈtoj apɾenˈdjendo espaˈɲol/
• Estoy viendo una serie. /esˈtoj ˈbjendo ˈuna ˈseɾje/
• Sigo practicando. /ˈsiɣo pɾaktiˈkando/
• Estoy diciendo la verdad. /esˈtoj diˈsjendo la beɾˈðað/

Use the forms in context, especially when reacting to a scene. If someone says hello, you can connect your core grammar with phrases from how to say hello in Spanish. If a scene ends with someone leaving, notice whether the dialogue uses a simple verb or a progressive construction, then compare it with Spanish goodbye phrases.

The goal is not to force estar /esˈtaɾ/ plus a gerund into every sentence. It is to recognize when Spanish speakers want to zoom in on an action as it unfolds. Once hablando /aˈblando/, comiendo /koˈmjendo/, durmiendo /duɾˈmjendo/, and yendo /ˈʝendo/ feel automatic, you can follow spoken Spanish with far less mental translation.