Futur simple vs futur proche (aller + infinitive)

Summary

The futur proche (aller + infinitive) frames the future as near, planned or connected to now and dominates speech; the one-word futur simple is for distant, formal or written future, predictions and promises, and is required after quand/dès que/lorsque when the main clause is future.

Explanation

French has two everyday ways to talk about the future. The futur proche is built with the present tense of aller plus an infinitive: je vais partir, nous allons manger, il va pleuvoir. The futur simple is a single conjugated form built on the infinitive plus endings: je partirai, nous mangerons, il pleuvra. Both can translate English "will / be going to," so the choice is about nuance and register, not about whether the event is grammatically future.

The futur proche frames the action as near, already decided, or anchored in the present moment, which is why it dominates spoken French. Use it for plans, intentions and things visibly about to happen: je vais appeler le médecin tout de suite, on va déménager le mois prochain, attention, tu vas tomber ! In conversation it is the natural, safe default, and over-using the futur simple in casual speech can sound stiff.

The futur simple frames the action as more distant, abstract, or detached from the present. It is the tense of predictions, general truths about the future, promises, resolutions and timetables, and it is far more frequent in writing — news, literature, formal letters: un jour, nous habiterons au bord de la mer; je vous répondrai dès que possible; en 2050, les villes seront différentes. It can also carry a slightly more solemn or committed tone than the futur proche.

There is one place where the futur simple is grammatically required, not just stylistically preferred: after the time conjunctions quand, lorsque, dès que and aussitôt que, when the main clause refers to the future, French puts the subordinate verb in the future too. So you say quand il arrivera, nous mangerons (literally "when he will arrive, we will eat") — unlike English, which uses the present after "when." Using the present here (quand il arrive) changes the meaning to a habit.

The decision rule: if you are speaking and the event is near, planned, or you can point to it starting, use aller + infinitive (futur proche). If the event is distant, hypothetical, a prediction or promise, or you are writing in a formal register — or if the clause begins with quand/dès que/lorsque about the future — use the futur simple. When in doubt in conversation, the futur proche is rarely wrong.

A few practical notes. The negation wraps the conjugated verb, so in the futur proche it surrounds aller: je ne vais pas partir, while in the futur simple it surrounds the single form: je ne partirai pas. The futur proche keeps a sense of intention even for fairly distant plans (on va se marier l'an prochain), and many irregular futur-simple stems (irai, ferai, viendrai, serai, aurai) must be learnt separately — see the futur simple conjugation rule.

Examples

Je vais appeler le médecin tout de suite. — I'm going to call the doctor right away. (Futur proche: immediate, decided action, typical of speech.)

Un jour, nous habiterons au bord de la mer. — One day, we will live by the sea. (Futur simple: distant, more abstract future.)

Quand il arrivera, nous mangerons. — When he arrives, we will eat. (After quand about the future, French requires the futur simple in both clauses (unlike English).)

Attention, tu vas tomber ! — Careful, you're going to fall! (Futur proche for something visibly about to happen; the futur simple would be unnatural here.)

Je vous répondrai dès que possible. — I will reply to you as soon as possible. (Futur simple in a formal written promise.)

Common mistakes

Prerequisites

• Futur simple

Related rules

• Futur simple
• Present indicative
• Passé composé vs imparfait