Expressing purpose in French : complete course

What Does ‘Expressing Purpose’ Mean in French?

In French, l’expression du but refers to the way we express a goal, an intention, or a purpose. Simply put, it answers the question: Why are you doing something? or What is the aim of this action?

For example, when you say ‘I am studying French in order to travel to Paris’, the highlighted part expresses your purpose. French has several specific words and structures to express this idea, and learning them will make your French much more natural and precise.

Simple Examples to Get Started

• Je travaille dur pour réussir. — I work hard to succeed.
• Elle parle lentement pour que tu comprennes. — She speaks slowly so that you understand.
• Il est parti tôt afin d’éviter les embouteillages. — He left early in order to avoid traffic jams.

As you can see, the structure changes depending on whether the subject of the main clause and the purpose clause is the same person or not. Don’t worry — we will explain this clearly below.

The Key Elements of L’Expression du But in French

There are several connectors and structures used to express purpose in French. The main ones can be grouped into two categories: those followed by an infinitive, and those followed by the subjunctive.

1. Connectors Followed by the Infinitive

When the subject of both clauses is the same person, use an infinitive after the connector.

• Je prends le bus pour aller au travail. — I take the bus to go to work.
• Nous partons tôt afin d’arriver à l’heure. — We leave early in order to arrive on time.

2. Connectors Followed by the Subjunctive

When the subject of the two clauses is different, use the subjunctive mood after the connector.

• Je t’envoie un message pour que tu n’oublies pas. — I send you a message so that you don’t forget.
• Il ferme la porte afin que les enfants dorment. — He closes the door so that the children sleep.

3. A Common Mistake to Avoid

Many learners use pour que with an infinitive, or pour with the subjunctive. This is incorrect. Remember the rule:

• Same subject → pour + infinitive
• Different subjects → pour que + subjunctive

Why Expressing Purpose Matters in French

Being able to express your goals and intentions is essential for everyday communication. Whether you are explaining why you are learning French, why you are going somewhere, or why someone is doing something, this structure comes up constantly.

Without these expressions, your sentences can sound flat or incomplete. Compare:

• Without purpose: Je fais du sport. — I exercise.
• With purpose: Je fais du sport pour rester en bonne santé. — I exercise to stay healthy.

The second sentence is much more informative and natural. Mastering these structures will also help you write better essays and have more fluent conversations.

Comparison With Other Languages

If you already speak English or Spanish, you might find some similarities — but also some important differences.

As you can see, Spanish is very close to French in this case — both use the subjunctive when the subjects differ. English, however, uses the indicative (‘so that he understands’), which feels more natural to English speakers but does not apply in French.

A Full Example in Context

Here is a short paragraph using different purpose expressions. Notice how they connect ideas naturally:

Marie apprend le français pour travailler en France. Elle suit des cours tous les jours afin de progresser rapidement. Son professeur parle lentement pour qu’elle comprenne bien. Il lui donne aussi des exercices de peur qu’elle oublie les règles.

Translation: Marie is learning French to work in France. She takes classes every day in order to progress quickly. Her teacher speaks slowly so that she understands well. He also gives her exercises for fear that she forgets the rules.

Key Takeaways

• L’expression du but is used to express goals, intentions, and purposes in French.
• Use pour or afin de + infinitive when both clauses have the same subject.
• Use pour que or afin que + subjunctive when the subjects are different.
• English speakers: don’t translate ‘so that’ directly — remember the subjunctive rule in French!
• Spanish speakers: the logic is very similar — use this to your advantage.
• Practice with simple, real-life sentences to build confidence.

Sources

• Grévisse, M. & Goosse, A. (2011). Le Bon Usage (15th ed.). De Boeck & Larcier. — A comprehensive reference grammar of the French language.
• Riegel, M., Pellat, J.-C., & Rioul, R. (2009). Grammaire méthodique du français. Presses Universitaires de France. — A detailed and accessible grammar book widely used in French language teaching.
• Council of Europe (2001). Common European Framework of Reference for Languages (CEFR). Cambridge University Press. — The international standard for describing language ability and learning objectives.