French Gerunds and Infinitives: Complete Study Guide

The infinitive is the base form of a verb. It never changes based on person or tense. In French, infinitives have three endings: -er, -ir, and -re.

Recognizing Infinitive Forms

The three infinitive types are:

• -er verbs: parler (to speak), manger (to eat), danser (to dance)
• -ir verbs: finir (to finish), partir (to leave), choisir (to choose)
• -re verbs: vendre (to sell), attendre (to wait), entendre (to hear)

Infinitives function as nouns in sentences. They can appear in many grammatical positions throughout your text.

Infinitives After Modal Verbs

Modal and semi-modal verbs require infinitives directly after them with no preposition. These verbs include pouvoir, vouloir, devoir, falloir, and aller.

Here are real examples:

• Je veux aller au cinéma (I want to go to the cinema)
• Elle doit finir ses devoirs (She must finish her homework)
• Nous allons visiter Paris (We are going to visit Paris)

You express ability, desire, obligation, and future plans using these combinations.

Infinitives After Other Verbs

Many verbs also govern infinitives, but some require the preposition à or de before the infinitive. For example:

• Elle commence à comprendre (She is beginning to understand)
• Il a oublié de fermer la porte (He forgot to close the door)

Understanding which verbs require which prepositions is essential. This is why memorizing verb-preposition pairs matters.

Infinitives as Subjects or Objects

The infinitive can stand alone as a subject or object. Consider these sentences:

• Lire est un plaisir (Reading is a pleasure)
• J'aime danser (I like to dance)

Mastering these patterns requires exposure and practice, making flashcards an ideal study tool for memorizing verb-preposition-infinitive combinations.

The French gerund (le gérondif) is a present participle form that always starts with the preposition "en". It functions as an adverbial element modifying the main clause in your sentence.

Forming the French Gerund

To form the gerund, follow these steps:

1. Take the nous form of the present indicative
2. Remove the -ons ending
3. Add -ant
4. Always add "en" before the participle

Here are examples:

• From parlons, you get en parlant (while speaking)
• From finissons, you get en finissant (while finishing)
• From vendons, you get en vendant (while selling)

How Gerunds Express Meaning

The gerund shows three key relationships:

• Simultaneity: En regardant la télévision, j'ai appelé ma mère (While watching TV, I called my mother). Both actions happened at the same time.
• Causality: En étudiant davantage, tu réussiras l'examen (By studying more, you will pass the exam). The gerund shows how success happens.
• Manner: Elle a couru en criant (She ran while shouting). The gerund describes how an action occurs.

Critical Rule: The Subject Must Match

The subject of the gerund must be the same as the subject of the main verb. You would say En arrivant à l'école, j'ai vu mon ami (Upon arriving at school, I saw my friend). Here, "I" is both the subject of arriving and seeing.

One common mistake is forgetting that en is mandatory. You cannot use the present participle alone without it as you might in English.

Irregular Gerunds

Three verbs form gerunds irregularly:

• avoir becomes en ayant
• être becomes en étant
• savoir becomes en sachant

Flashcards help solidify gerund formation and usage by repeatedly presenting base verbs and requiring you to recall both the formation rule and appropriate usage contexts.

Different French verbs pair with infinitives according to specific patterns. Mastering these categories accelerates your learning significantly.

Modal Verbs: No Preposition Required

Modal verbs are followed directly by an infinitive without any preposition. These verbs express ability, desire, obligation, necessity, and daring:

• pouvoir (can, to be able to)
• vouloir (to want)
• devoir (must, to have to)
• falloir (must, to be necessary)
• oser (to dare)

Examples include:

• Je peux venir demain (I can come tomorrow)
• Nous voulons apprendre le français (We want to learn French)
• Tu dois respecter les règles (You must respect the rules)

Verbs of Beginning and Ending: Require "à"

Verbs like commencer, continuer, and finir require the preposition à before the infinitive:

• Il a commencé à écrire un roman (He began writing a novel)
• Elle a fini de préparer le dîner (She finished preparing dinner)
• Nous continuons à apprendre (We continue to learn)

Verbs of Perception: No Preposition

Perception verbs are followed directly by an infinitive without a preposition. These include voir, entendre, regarder, and écouter:

• Je l'ai entendu chanter (I heard him sing)
• Elle regarde les enfants jouer (She watches the children play)
• Nous écoutons les oiseaux chanter (We listen to the birds sing)

Verbs of Preference and Habit: No Preposition

Verbs expressing preference or habit take the infinitive directly. These include aimer, adorer, détester, and préférer:

• Ils adorent voyager en train (They love traveling by train)
• Je déteste attendre (I hate waiting)
• Elle préfère rester à la maison (She prefers to stay at home)

Verbs Requiring "de"

Some verbs require the preposition de, including essayer, oublier, refuser, and éviter:

• J'ai oublié de payer la facture (I forgot to pay the bill)
• Elle a refusé de participer (She refused to participate)
• Ils ont essayé de résoudre le problème (They tried to solve the problem)

Verbs Requiring "à"

Still others require à before the infinitive, such as apprendre, enseigner, and inviter:

• Elle m'a appris à cuisiner (She taught me to cook)
• Je vous invite à dîner (I invite you to dine)
• Ils m'ont enseigné à écrire (They taught me to write)

Creating flashcards organized by these verb categories helps you internalize patterns and recognize which preposition, if any, is required in different contexts. Regular review strengthens your ability to choose the correct construction automatically.

The choice between infinitive and gerund depends on the grammatical structure and the meaning you want to convey. You cannot substitute one for the other without changing or losing meaning.

When to Use the Infinitive

After most verbs, you must use an infinitive, never a gerund. You say Je commence à travailler (I begin to work), not Je commence en travaillant, which would be incorrect.

Infinitives appear after:

• Modal verbs (pouvoir, vouloir, devoir)
• Verbs of perception (voir, entendre)
• Verbs requiring à or de
• Prepositions like avant (before), après (after), sans (without)

When to Use the Gerund

When expressing actions that occur simultaneously with the main action or that modify the main verb's manner, you need the gerund with en. You say En travaillant dur, j'ai réussi (By working hard, I succeeded), where the gerund explains how success was achieved.

Both Structures in One Sentence

Sometimes both forms appear in the same sentence but serve different functions. For example, J'aime parler en marchant means I like to speak while walking. Here, aimer takes the infinitive parler and the gerund en marchant modifies how the speaking occurs.

Aspect and Temporal Meaning

The infinitive is generally neutral regarding tense. It focuses on the action itself without temporal reference.

The gerund, because it uses a participle form, emphasizes the ongoing or continuous nature of an action. It creates a specific temporal relationship with the main clause.

Consider this contrast:

• Je regarde les enfants jouer dehors (I watch the children play outside). This simply describes observation.
• Je regarde les enfants en jouant dehors (I watch the children while playing outside myself). This suggests the observer is also playing.

Understanding these nuanced differences requires contextual exposure and practice. Flashcards that present complete example sentences, rather than isolated words, help you recognize how these structures function in real communication and build intuition about when to select each form.

Flashcards are particularly effective for mastering gerunds and infinitives because they allow spaced repetition of patterns that require automaticity during conversation.

Organize Cards by Verb Category

Create cards organized by verb category, with the French verb on the front and the correct infinitive or gerund construction on the back. Include an example sentence showing usage.

For example, a card might display:

• Front: commencer
• Back: à + infinitive, with example Elle commence à danser (She is beginning to dance)

Fill-in-the-Blank Cards

Create cards presenting incomplete sentences that require you to fill in the gerund or infinitive form. The front might show En ___ (parler/parlant), j'ai appris beaucoup de choses. The back reveals the correct answer: en parlant, plus explanation of why this form works.

Deck Organization Strategy

Make separate decks for different verb categories to target specific patterns systematically:

• Deck 1: Modal verbs (pouvoir, vouloir, devoir, falloir)
• Deck 2: Beginning/ending verbs (commencer, finir, continuer)
• Deck 3: Perception verbs (voir, entendre, regarder)
• Deck 4: Gerund formation and usage
• Deck 5: Minimal pairs contrasting both forms

Progressive Learning Approach

Start by drilling verb-preposition combinations in isolation. Then progress to example-sentence cards that contextualize usage. This builds foundation first, then applies knowledge.

Leverage Spaced Repetition Features

Review consistently using the spaced repetition feature available in most flashcard apps. This automatically increases intervals between cards you've mastered and brings struggling cards to your attention more frequently.

Minimal Pairs for Contrast

Create cards that present minimal pairs contrasting infinitive and gerund usage. Examples include:

• Avant de partir (before leaving) versus En partant (while leaving)
• Sans oublier (without forgetting) versus En oubliant (while forgetting)

This strengthens your ability to distinguish between them.

Include Irregular Forms

Include irregular gerunds on separate cards, since ayant, étant, and sachant differ from the regular pattern. Give these forms extra attention during your study sessions.

Bidirectional Practice

Study actively by testing yourself in both directions. Recognize the correct construction from the English translation. Also produce it from memory when presented with the French base verb. This bidirectional practice ensures you can both understand these structures when reading or listening and generate them accurately when speaking or writing.