French has a beautiful symmetry that English mostly lacks. Many connectors — avant, après, pour, sans, à condition, à moins — come in two coordinated forms: a preposition that takes a noun or infinitive, and a conjunction that takes a full clause introduced by que. The choice between them is mechanical and predictable, but learners trip on it constantly because English doesn't make you choose. Before going and before you go are both fine in English. In French, you have to know whether the action belongs to the same subject or a different one — and pick the right form accordingly.
This is one of the highest-leverage rules in B1 French. Once you internalize it, dozens of constructions become automatic.
The core rule
For each connector, ask yourself: does the action after the connector have the same subject as the main verb?
- Same subject → use the prepositional form (avant de, après, pour, sans, à condition de, à moins de) + infinitive (or infinitif passé for après).
- Different subject → use the conjunctional form (avant que, après que, pour que, sans que, à condition que, à moins que) + finite clause (subjunctive in most cases).
The two-line summary:
| Connector | Same subject (prep + inf) | Different subjects (conj + que + clause) |
|---|---|---|
| before | avant de + inf | avant que + subjunctive |
| after | après + inf passé | après que + indicative |
| in order to | pour + inf | pour que + subjunctive |
| without | sans + inf | sans que + subjunctive |
| provided that | à condition de + inf | à condition que + subjunctive |
| unless | à moins de + inf | à moins que + subjunctive |
Notice that après que is the lone exception that takes the indicative, not the subjunctive. (More on this later.)
Avant: before
The most common pair. Your subject decides whether you say avant de partir or avant que tu partes.
Je veux te parler avant de partir.
I want to talk to you before I leave.
Here the speaker is doing both verbs — je talks, je leaves. Same subject → avant de + infinitive.
Je veux te parler avant que tu partes.
I want to talk to you before you leave.
Now the subjects differ — je talks, tu leaves. Different subjects → avant que + subjunctive.
On a fini le repas avant que les invités n'arrivent.
We finished the meal before the guests arrived.
Note the optional ne (called ne explétif) after avant que. It's a stylistic remnant of older French — common in formal writing, optional in everyday speech, and never negative. Ne...partes still means leave, not not leave.
Avant de répondre, prends le temps de réfléchir.
Before answering, take time to think.
When the imperative addresses tu and the avant de clause shares that subject, infinitive again.
Après: after
Après is unusual in two ways. First, the same-subject form uses the past infinitive (infinitif passé: avoir / être + past participle), not the bare infinitive. Second, the different-subject form après que takes the indicative, not the subjunctive.
Après avoir mangé, on est allés au cinéma.
After eating, we went to the cinema.
Here avoir mangé is the past infinitive — same subject as on est allés. The past form is required because after implies the eating happened first.
Après être rentrée, elle s'est endormie tout de suite.
After getting home, she fell asleep right away.
Être rentrée with feminine agreement because it's elle. Past infinitive of rentrer uses être.
Après que tu es parti, on a tout rangé.
After you left, we tidied everything up.
Après que takes the indicative. Why the asymmetry with avant que + subjunctive? Logically, avant que introduces an event that hasn't happened yet from the perspective of the main clause — uncertainty, virtual reality — which fits the subjunctive. Après que introduces a completed, factual event — the indicative is appropriate. In practice, many native speakers do say après qu'il soit parti (subjunctive) by analogy with avant que; this is widespread but technically prescribed against. Both forms are heard.
Pour: in order to / so that
Je travaille beaucoup pour réussir.
I work a lot to succeed.
Same subject (je works, je succeeds) → pour + infinitive.
Je t'envoie ce message pour que tu sois au courant.
I'm sending you this message so that you know.
Different subjects (je sends, tu know) → pour que + subjunctive.
Mes parents font des sacrifices pour que nous puissions étudier.
My parents make sacrifices so that we can study.
This is one of the classic subjunctive triggers. Pour que always demands the subjunctive, no exceptions.
Sans: without
Elle est partie sans dire un mot.
She left without saying a word.
Elle leaves and elle would have said the word — same subject → sans + infinitive.
Elle est partie sans que je m'en aperçoive.
She left without my noticing.
Elle leaves and je notice — different subjects → sans que + subjunctive. Note the optional ne explétif here too: sans que je ne m'en aperçoive.
On a réussi sans aucune difficulté et sans qu'il faille faire d'effort.
We succeeded without any difficulty and without having to make any effort.
This sentence shows both — sans + noun (aucune difficulté) and sans que + subjunctive (il faille).
À condition de / à condition que: provided that
Tu peux sortir à condition de rentrer avant minuit.
You can go out provided you come home before midnight.
Same subject (tu go out, tu come back) → à condition de + infinitive.
Tu peux sortir à condition que tes parents soient d'accord.
You can go out provided your parents agree.
Different subjects → à condition que + subjunctive.
À moins de / à moins que: unless
Je viendrai te chercher à moins d'avoir un empêchement.
I'll come pick you up unless I have something get in the way.
Same subject → à moins de + infinitive.
Je viendrai te chercher à moins que tu ne préfères y aller seul.
I'll come pick you up unless you'd rather go alone.
Different subjects → à moins que + subjunctive. The ne explétif is especially common with à moins que.
Conjunctions without a prepositional twin
Some conjunctions only have the que form — there's no preposition + infinitive shortcut, even when subjects match.
Bien que: although
Bien qu'il soit fatigué, il continue à travailler.
Although he's tired, he keeps working.
Bien que je sache la réponse, je préfère me taire.
Although I know the answer, I'd rather keep quiet.
There is no bien de + infinitive. Bien que always takes a clause + subjunctive, even when the subjects match. The closest "shortcut" is to rephrase with malgré + noun or tout en + present participle: Tout en sachant la réponse, je préfère me taire.
Quoique: although (formal)
Same behavior as bien que — no prepositional twin, takes the subjunctive.
Quoique ce soit difficile, je vais essayer.
Although it's difficult, I'm going to try.
Pourvu que: provided that, as long as
Tu peux faire ce que tu veux, pourvu que tu sois rentré à minuit.
You can do what you want, as long as you're home by midnight.
No prep form. Always pourvu que + subjunctive.
Jusqu'à ce que: until
Reste ici jusqu'à ce que je revienne.
Stay here until I come back.
The prep version jusqu'à + noun (jusqu'à demain) doesn't extend to verbs without que. With a verb, you need jusqu'à ce que + subjunctive.
A worked walkthrough
Let's run through the same idea — I'll call you before X happens — to drill the choice.
Same subject (I'll call you before I leave):
Je t'appellerai avant de partir.
I'll call you before I leave.
Different subjects (I'll call you before you leave):
Je t'appellerai avant que tu partes.
I'll call you before you leave.
With après (same subject — past infinitive):
Je t'appellerai après être rentré.
I'll call you after I get home.
With après que (different subjects — indicative):
Je t'appellerai après que tu seras rentré.
I'll call you after you get home.
With pour (same subject):
Je t'appelle pour te demander un service.
I'm calling to ask you for a favor.
With pour que (different subjects):
Je t'appelle pour que tu saches la nouvelle.
I'm calling so that you know the news.
The pattern is mechanical. Once you flip into the habit of asking same subject? different subject?, the right form becomes automatic.
Why the subjunctive?
The connectors that switch to que + subjunctive (avant que, pour que, sans que, à condition que, à moins que) all share something: they introduce an event that is not yet a fact at the moment of the main clause. Before X happens — X hasn't happened yet. So that Y can do Z — Z is not yet real, it's the desired effect. Without X noticing — the noticing didn't happen. Provided that Y agrees — Y's agreement is hypothetical. The subjunctive is the mood for actions that exist in the realm of intent, hypothesis, and not-yet-real, so it makes deep sense that these conjunctions trigger it.
Après que is the exception precisely because after introduces a completed, factual event — the indicative fits.
Common Mistakes
❌ Je veux te parler avant que tu pars.
Incorrect — avant que requires the subjunctive.
✅ Je veux te parler avant que tu partes.
I want to talk to you before you leave.
Avant que takes the subjunctive. Tu pars is indicative; tu partes is subjunctive.
❌ Je travaille beaucoup pour que je réussisse.
Incorrect — same subject demands pour + infinitive, not pour que + clause.
✅ Je travaille beaucoup pour réussir.
I work a lot to succeed.
When subjects match, the que form is grammatically allowed but stylistically wrong. French strongly prefers the infinitive when it can.
❌ Après manger, on est allés au cinéma.
Incorrect — après with same subject takes the past infinitive, not the bare infinitive.
✅ Après avoir mangé, on est allés au cinéma.
After eating, we went to the cinema.
Après is the connector that requires the infinitif passé. Avoir / être + past participle.
❌ Bien que de comprendre, c'est difficile à expliquer.
Incorrect — bien que has no infinitive shortcut, only the que form.
✅ Bien que je comprenne, c'est difficile à expliquer.
Although I understand, it's hard to explain.
Bien que is one of the conjunctions that has no prepositional twin. Always que + subjunctive.
❌ À moins que tu viens, je reste ici.
Incorrect — à moins que takes the subjunctive.
✅ À moins que tu (ne) viennes, je reste ici.
Unless you come, I'm staying here.
À moins que + subjunctive (viennes, not viens), with optional ne explétif.
Key Takeaways
- For each connector, ask first: same subject or different subjects?
- Same subject → preposition + infinitive (or past infinitive for après).
- Different subjects → conjunction + que
- finite clause (subjunctive, except après que).
- Bien que, quoique, pourvu que, jusqu'à ce que have no prep twin and always take que
- subjunctive.
- Après que is the lone que form that takes the indicative — the event is factual.
- The ne explétif (after avant que, à moins que, sans que) is optional, formal, and never negative.
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Start learning French→Related Topics
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- Subjunctive after Purpose Conjunctions: pour que, afin que, de sorte queB1 — When you do something so that someone else can do something, French strings the two events together with pour que, afin que, or de sorte que — and the verb after the conjunction goes into the subjunctive.
- Subjunctive after Temporal Conjunctions: avant que, jusqu'à ce que, en attendant queB1 — When a clause refers to an event that has not yet happened from the perspective of the main clause — before, until, while waiting for — French uses the subjunctive. The mirror-image conjunction après que takes the indicative, creating one of French's most surprising asymmetries.
- Subjunctive after Conditional Conjunctions: à condition que, à moins que, pourvu queB1 — When a clause sets a condition, an exception, or a hypothetical premise — provided that, unless, supposing that — French uses the subjunctive. These conjunctions diverge sharply from the everyday si, which keeps the indicative.
- Infinitif vs Que + Subjonctif: subjectsB1 — When the subject of an embedded clause matches the subject of the main verb, French collapses the embedded clause to an infinitive — 'je veux partir', not 'je veux que je parte'. When the subjects differ, French uses 'que' followed by either subjunctive or indicative depending on the matrix verb. This same-subject rule is one of the most reliable predictors of French sentence structure.