Spanish rules and examples for idiomatic verbs with infinitives

Introduction

Idiomatic verbs with infinitives are common in Spanish and often confuse learners because the meaning can differ from a literal translation. This article explains how they work, when to use them, and gives clear examples so English-speaking learners can use these constructions confidently.

What are idiomatic verbs with infinitives?

Some Spanish verbs are followed by an infinitive to form a phrase whose meaning is not simply the verb plus the action. These are often called idiomatic constructions. The structure is verb + infinitive, and sometimes includes prepositions like a, de, por, or en. Understanding which verbs require which preposition — or no preposition — is essential.

Key patterns to recognize

There are three main patterns: verb + infinitive with no preposition, verb + a + infinitive, and verb + de + infinitive. Each pattern can change the meaning or indicate different grammatical relationships between actions.

Verb + infinitive (no preposition)

Many verbs are followed directly by an infinitive without any intervening preposition. These often express desire, intention, obligation, or ability. Common verbs in this pattern include poder, querer, deber, saber, and preferir.

Examples:

Yo puedo ir mañana.
She can go tomorrow in English; Spanish uses puedo ir.

Él quiere estudiar medicina.
He wants to study medicine; literal quiere estudiar.

Debes llamar a tu madre.
The sentence uses debes llamar for obligation.

Sé hablar francés.
Use sé hablar to say I know how to speak.

Preferimos salir temprano.
Here preferimos salir indicates preference.

Nuances and tips

With modal verbs like poder and querer, the infinitive does not change, and the subject is usually the same for both verbs. You can use a different subject with a change of structure, often requiring a preposition and a pronoun.

Verb + a + infinitive

Some verbs require the preposition a before the infinitive. This pattern is common after verbs that indicate movement, beginning an action, or a personal indirect object. Frequent verbs include ir a, empezar a, aprender a, ayudar a, and volver a.

Examples:

Voy a comer ahora.
Use voy a comer to express near future, I am going to eat.

Comenzó a nevar por la tarde.
She began to snow uses comenzó a nevar for starting an action.

Estoy aprendiendo a tocar la guitarra.
The construction aprendiendo a tocar indicates learning to do something.

Mi madre me ayuda a estudiar.
Here ayuda a estudiar shows assisting someone in doing something.

Volvieron a cambiar la fecha.
Volvieron a cambiar indicates repetition: they changed the date again.

Special note on ir a + infinitive

The expression ir a + infinitive is the common near-future tense in Spanish. It is equivalent to the English going to + verb, and is used for plans, intentions, or near certainties.

Verb + de + infinitive

The preposition de often follows verbs that express an opinion, a memory, a fear, or a prohibition. Verbs like acabar de, dejar de, olvidar de (though often used without de in Latin America), alegrarse de, and tratar de use de before the infinitive.

Examples:

Acabo de llegar.
The phrase acabo de llegar means I have just arrived.

Dejé de fumar el año pasado.
Dejé de fumar means I stopped smoking.

Trato de estudiar todos los días.
Trato de estudiar means I try to study every day.

Me alegro de verte.
Me alegro de verte expresses I am glad to see you.

Remember regional variation

Some verbs vary by region. For example, many speakers in Spain say olvidarse de, while in parts of Latin America you may hear simply olvidar + direct object. Check usage based on the dialect you are learning.

Verbs that change meaning with different constructions

Some verbs change meaning depending on whether they are followed by an infinitive directly, or by a preposition plus infinitive. Recognizing these differences is critical for correct usage.

Examples of meaning changes:

Dejar

Dejar + infinitive: Ella dejó fumar.
She stopped smoking or she quit smoking when dejó fumar is used in Latin American contexts, though more precisely in Spain dejar de fumar is used to mean stop smoking.

Dejar + a + infinitive is rare; instead, dejar que + subjunctive is used for allow, as in Ella dejó que él saliera.

Volver

Volver + a + infinitive: Volví a intentarlo.
This means I tried again; volver a indicates repetition.

Acabar

Acabar de + infinitive: Acabo de comer.
Means I have just eaten; recent past.

Acabar + infinitive without de is rare with this meaning, so learners should remember the de for recent actions.

Reflexive verbs and infinitives

Reflexive verbs can be used with infinitives in two main ways: attach the reflexive pronoun to the infinitive, or place it before the conjugated verb. Both are correct, and the choice can change emphasis but not meaning.

Examples:

Voy a ducharme ahora. or Me voy a duchar ahora.
Both mean I am going to shower now; ducharme attaches the reflexive pronoun to the infinitive, while me voy a duchar places it before the conjugated verb.

Quiero levantarme temprano. or Me quiero levantar temprano.
Both mean I want to get up early.

Placement tips

In affirmative commands with an infinitive, you must attach the pronoun to the infinitive: Tengo que hacerlo ahora. In negative commands, the pronoun goes before the verb: No me voy a duchar ahora.

Infinitive as a noun and after prepositions

The infinitive can function like a noun in Spanish and is commonly used after prepositions other than the common verb-specific patterns. Prepositions like para, sin, por, and antes de/ después de frequently appear before an infinitive.

Examples:

Es importante estudiar mucho.
Here estudiar acts like a noun: it is important to study a lot.

Trabajo para ganar dinero.
Para ganar expresses purpose: I work to earn money.

Salió sin decir nada.
Sin decir means without saying anything.

Antes de comer, lávate las manos.
Antes de comer gives a sequence: before eating, wash your hands.

Common verbs and their idiomatic patterns (cheat sheet)

Below are practical pairings to memorize; first appearance of each main pattern is bolded earlier, now repeated in context using for clarity.

Verb + infinitive (no preposition):

poder, querer, deber, saber, preferir

Verb + a + infinitive:

ir a, empezar a, aprender a, ayudar a, volver a

Verb + de + infinitive:

acabar de, dejar de, tratar de, alegrarse de, olvidarse de

Cultural notes on usage and politeness

Spanish speakers often use polite or indirect constructions that influence verb+infinitive choices. For requests, verbs like poder or poder in conditional form are common: ¿Podrías ayudarme a mover esto? Using podrías ayudarme a sounds softer than a direct imperative like Ayúdame.

In spoken Spanish, contractions and dropping prepositions occur regionally. For example, the near-future voy a often sounds like ‘voy a’ contracted in rapid speech, and some speakers shorten para to pa in informal contexts: Voy pa casa. Be careful with these colloquialisms until you are comfortable with the standard forms.

Conclusion

Mastering idiomatic verbs with infinitives means learning patterns: verb + infinitive, verb + a + infinitive, and verb + de + infinitive, plus exceptions and meaning shifts. Pay attention to reflexive pronoun placement and regional variations. With practice and exposure to natural sentences, these constructions will become intuitive and greatly expand your ability to express nuanced ideas in Spanish.