Spanish rules and examples for verbs followed by “A” plus infinitive

Introduction

Many Spanish verbs are followed by the preposition a plus an infinitive. This pattern can be confusing for English speakers because the equivalent English verb often uses a different structure. This article explains when and why Spanish uses a + infinitive, with clear rules, examples, and tips for natural usage.

What does a + infinitive mean?

The structure a + infinitive links a main verb to another action expressed by an infinitive. It often marks direction toward doing something, intention, start of an action, or introduces the object of perception. The meaning in English varies: sometimes it corresponds to to + verb, sometimes to the gerund or simple infinitive without a preposition.

Basic pattern

Form: main verb + a + infinitive.
Example: Voy a estudiar mañana.

Common verbs that require a + infinitive

Some verbs almost always take a when followed by another verb. Learn these as a group because they behave predictably.

1. Ir a + infinitive (near future)

Use ir a + infinitive to express near future plans or intentions. This is equivalent to English going to + verb.

Voy a comer ahora.
Vamos a salir esta tarde.

2. Empezar/Comenzar a + infinitive (to start to)

Use empezar a or comenzar a to indicate the beginning of an action. Both verbs typically require a.

Empecé a estudiar español.
Comenzaron a llover las noticias.

3. Aprender a + infinitive (to learn to)

Use aprender a when describing learning a new skill or habit.

Aprendí a nadar el año pasado.
Ella está aprendiendo a tocar la guitarra.

4. Enseñar a + infinitive (to teach to)

Enseñar a shows who is taught to do something.

Mi abuela me enseñó a cocinar paella.
El profesor enseña a los estudiantes a escribir mejor.

5. Volver a + infinitive (to do again)

When you repeat an action, use volver a + infinitive. It implies doing something again.

Volvieron a discutir el mismo tema.
No quiero volver a cometer ese error.

6. Ayudar a + infinitive (to help to)

Spanish typically requires a after ayudar when followed by an infinitive, though in casual speech you might sometimes hear it omitted. For learners, include a.

Mi amigo me ayudó a mudarme.
¿Puedes ayudarme a entender esto?

7. Invitar a + infinitive (to invite to)

Use invitar a when inviting someone to perform an action.

Me invitaron a cantar en la fiesta.
Te invito a venir conmigo.

Verbs of perception and movement

Some verbs related to perception and movement also take a + infinitive, but the meaning can change depending on whether you use the infinitive or a finite clause.

1. Ver, oír, escuchar + infinitive

When perception verbs are followed directly by an infinitive, they usually emphasize the action as a whole or the moment it occurred. Use the infinitive when you describe seeing or hearing someone do something.

Lo vi a salir de la casa. (less common; more natural: Lo vi salir de la casa)
Lo vi salir is more common without a in many dialects, but some regions use a for emphasis. If you use a full clause, use que: Lo vi que salía.

2. Ir a + infinitive with movement verbs

Movement verbs like entrar, salir, subir, bajar often are followed by an infinitive without a: entrar a + infinitive can exist but depends on meaning. For movement that leads to another action, speakers vary regionally.

Entró a hablar con el director. vs Entró a hablar… both appear in real speech. Pay attention to native usage in your target dialect.

When not to use a + infinitive

Not all verbs require a before an infinitive. Some common patterns do not use the preposition.

1. Querer, poder, deber, preferir, saber

Modal verbs in Spanish usually take a bare infinitive without a. Think of them like English modal verbs that directly link to the next verb.

Quiero comer ahora.
Puedo ayudar mañana.
Debes estudiar más.

2. Verbs followed by direct object infinitive without preposition

Verbs like dejar, hacer, sentir often link directly to an infinitive without a.

Me dejó entrar sin hablar. (dejar + infinitive)
La película me hizo llorar. (hacer + infinitive)

3. After prepositions other than a

If the verb is governed by a different preposition, do not use a. For example, after para, por, sin, con, en, use the corresponding preposition then the infinitive.

Estudia para aprobar el examen.
Lo hizo sin pensarlo.

Differences between personal a and a + infinitive

Do not confuse the personal a (used before a direct object that is a person) with the preposition a used before an infinitive. They are the same word but serve different grammatical functions.

Veo a María. (personal a before a person)
Veo a estudiar no es correcto; instead use Veo estudiar or Lo veo estudiar in some contexts.

Use with reflexive verbs and pronouns

When the infinitive is reflexive, the reflexive pronoun can attach to the infinitive or appear before the conjugated verb. Both options are acceptable and common.

Voy a lavarme las manos. = Me voy a lavar las manos.
Empieza a ducharte. = Te empieza a duchar is less natural; prefer Empieza a ducharte or Te estás empezando a duchar.

Placement of object pronouns

If you attach the pronoun to the infinitive, keep the accent rules in mind with certain tenses. For simple a + infinitive constructions, attach normally.

Quiero verlo. vs Lo quiero ver. Both are correct; style differs by emphasis.

Meaning changes depending on the verb

Adding a can change the nuance of the main verb. Pay attention to subtle differences in meaning.

1. Volver a vs volver + infinitive

Volver a indicates repetition: Volver a intentar means to try again. Without a the phrase might not convey repetition, and some constructions are ungrammatical without it.

Vuelvo a intentarlo. means I try again.
No se dice Vuelvo intentarlo with the same meaning.

2. Dejar de vs dejar + infinitive

Dejar de + infinitive means to stop doing something. Dejar + infinitive often means to allow or let someone do something when used transitively with an object.

Dejé de fumar. (I stopped smoking)
Me dejó salir temprano. (He let me leave early)

Cultural and regional notes

Usage of a + infinitive can vary across Spanish-speaking regions. In many Latin American dialects, speakers may omit a in contexts where Peninsular Spanish uses it, or add it for emphasis. Listening to native speakers from your target region helps internalize preferences.

Colloquial contractions and spoken Spanish

In fast speech, native speakers sometimes collapse sounds: Voy a estudiar becomes Voy a estudiar or even Voy a estudiar with reduced a. However, when writing or learning, keep the full form until you are comfortable with spoken patterns.

Practical tips for learners

1. Memorize common verb + a pairs. Start with ir a, empezar a, aprender a, enseñar a, ayudar a, invitar a, volver a.
2. Remember modal verbs do not take a: querer, poder, deber, saber, preferir.
3. Pay attention to verbs that change meaning depending on a, like volver a and dejar de.
4. Practice listening to native speech in your target region to notice preferred patterns.
5. When in doubt, check a good grammar reference or a reliable corpus to see natural usage.

Examples with translations

Voy a llamar a María mañana.
I am going to call María tomorrow.

Empezó a trabajar a las ocho.
He started to work at eight.

Aprendimos a cocinar comida mexicana en la clase.
We learned to cook Mexican food in class.

Me ayudó a encontrar un piso barato.
He helped me find a cheap apartment.

Volvieron a ver la película porque les gustó mucho.
They watched the movie again because they liked it a lot.

Te invito a acompañarme al concierto.
I invite you to join me at the concert.

Quiero dormir ahora. (no a with querer)
I want to sleep now.

La maestra enseña a leer a los niños.
The teacher teaches the children to read.

Common mistakes to avoid

1. Using a with modal verbs: incorrect: Puedo a ir. Correct: Puedo ir.
2. Omitting a after verbs that require it: incorrect: Empecé estudiar. Correct: Empecé a estudiar.
3. Confusing personal a with preposition a: incorrect: Veo a estudiar. Correct: Lo veo estudiar or Veo estudiar is context-dependent.

Advanced note: subjunctive and a + infinitive

When the second action depends on mood (desire, doubt, emotion), Spanish often uses the subjunctive in a subordinate clause introduced by que rather than a + infinitive. Use a + infinitive for neutral factual actions, not for subordinate clauses requiring subjunctive.

Quiero que vengas mañana. (subjunctive) vs Quiero venir mañana is about me wanting to come.

Conclusion

Mastering verbs followed by a + infinitive helps you speak more naturally and accurately in Spanish. Focus on common verb patterns, remember which verbs do not take a, and learn regional preferences through listening. With practice, the use of a + infinitive will become intuitive and add fluency to your Spanish.