Subjunctive after Temporal Conjunctions: avant que, jusqu'à ce que, en attendant que

Some temporal conjunctions point at events that have already happened — after he left, as soon as the train arrived, once we had finished. Others point at events that have not yet happened from the standpoint of the main clause — before he leaves, until she arrives, while we wait for him to come. French treats these two groups completely differently: the anteriority conjunctions (those pointing at unrealized events) require the subjunctive, while the posteriority conjunctions (those pointing at realized events) require the indicative.

This split produces one of the most counter-intuitive asymmetries in French grammar — the avant que / après que pair. Avant qu'il parte (before he leaves) takes the subjunctive; après qu'il est parti (after he left) takes the indicative. Same speaker, same event, same time-frame — but the mood flips depending on which side of the event you are standing on. This page works through the three main subjunctive-triggering temporal conjunctions, contrasts them with their indicative counterparts, and explains the underlying logic that makes the asymmetry feel less arbitrary than it first looks.

The core logic: not yet realized at the moment of reference

The principle behind the temporal subjunctive is one we have seen elsewhere: French uses the subjunctive for actions that are not yet asserted as real at the moment the speaker is considering them. With avant que, the embedded action has not yet occurred at the time of the main clause; with jusqu'à ce que, the embedded action is anticipated but not realized; with en attendant que, the embedded action is what we are waiting for, by definition not yet here.

By contrast, après que points at an action that is realized — by the time the main clause unfolds, the embedded event has already happened. That is asserted, established reality, and so it takes the indicative. The mood difference reflects a temporal logic, not a grammatical accident.

Avant que: the everyday before-conjunction

Avant que is the most common subjunctive-triggering temporal conjunction in French. It corresponds to English "before" when "before" introduces a clause with its own subject. It is neutral in register and used everywhere, from casual speech to formal writing.

The structure is fixed: avant que + subject + verb in subjunctive. There is no version with the indicative — avant qu'il part is ungrammatical.

The optional ne explétif

You will encounter avant que with a peculiar little ne inserted before the verb: avant qu'il *ne parte. This is the *ne explétif — a ne that has no negative force whatsoever. It does not negate the verb; it does not change the meaning; it is purely a stylistic ornament.

The ne explétif with avant que is optional. In casual conversation, native speakers usually drop it: avant qu'il parte. In formal writing, journalism, and careful prose, you will see it more often: avant qu'il ne parte. Both are correct; the choice is purely a register dial. If you want to play it safe, leave the ne out — modern French permits it everywhere.

The same optional ne explétif appears with several other subjunctive-triggering conjunctions, notably à moins que, sans que, de peur que, and de crainte que. We will not work through them all here — they all behave the same way, and the ne is always optional and always semantically empty.

Same-subject reduction: avant de + infinitive

When the subjects of the main clause and the avant que clause are the same person, French abandons the que-clause entirely and uses avant de + infinitive instead.

This is the same economy principle we saw with pour / pour que: same subject collapses to an infinitive, different subjects expand to que + subjunctive. Avant que je parte is wrong if the speaker themselves is doing both actions — it should be avant de partir.

Jusqu'à ce que: until

Jusqu'à ce que is the standard French way to say "until" when "until" introduces a clause. It is built compositionally from jusqu'à ("up to," "as far as") + ce que (a relative-clause complementizer); the whole expression has frozen into a single conjunction in modern French.

The mood is always subjunctive because "until" by definition points at an event that is not yet realized at the time of the main clause — you wait, then it happens. The unrealized status is what licenses the subjunctive.

A nuance: jusqu'à ce que takes the subjunctive even when describing past events that did happen. J'ai marché jusqu'à ce que je n'en puisse plus — at the moment of walking, the exhaustion was not yet realized. The subjunctive marks the perspective of the walker at the time of the action, not the perspective of the speaker recounting the story. This is consistent with the general principle: the mood reflects the status of the action at the relevant reference point, not its current truth-value in the speaker's world.

En attendant que: while waiting for

En attendant que literally means "while waiting that" and corresponds to English "while waiting for [someone] to do something" or "until [someone] does something." It overlaps semantically with jusqu'à ce que but emphasizes the activity of waiting itself.

The same-subject version uses en attendant de + infinitive:

In modern conversational French, en attendant que and jusqu'à ce que are sometimes interchangeable, though en attendant que keeps a slight emphasis on the waiting and jusqu'à ce que on the endpoint. Both take the subjunctive.

D'ici à ce que: by the time

D'ici à ce que means "by the time" or "between now and when." It locates the main-clause action somewhere in the interval before the embedded event happens. It takes the subjunctive for the same reason: the embedded event is not yet realized at the moment of speaking.

This conjunction is more common in writing than in speech, where speakers more often use en attendant que or avant que.

The big asymmetry: avant que vs. après que

Now the rule that surprises every learner. French treats "before" and "after" completely differently with respect to mood:

• Avant que
  • subjunctive — the embedded action has not yet happened.
• Après que
  • indicative — the embedded action has already happened.

The logic: avant que points at an unrealized event; après que points at a realized event. Realized events are facts and take the indicative; unrealized events are not asserted and take the subjunctive.

This is the prescriptively correct form. In modern speech, however, you will increasingly hear après que with the subjunctive by analogy with avant que — après qu'il soit parti instead of après qu'il est parti. The Académie française condemns this as an error; many native speakers do it without hesitation. The descriptive reality is that both forms occur in spoken French; the prescriptive standard remains the indicative.

For learners, the safest course is to follow the prescriptive rule and use the indicative after après que. It is what careful writers do, what grammar books teach, and what teachers expect. If you hear après qu'il soit parti in conversation, do not be surprised — but do not produce it yourself if you want your French to look polished.

Same-subject reductions: avant de / après + infinitive passé

The same-subject collapsings parallel each other:

• Avant de
  • infinitive (present): avant de partir — "before leaving"
• Après
  • infinitive passé (the avoir/être
    • past participle structure): après être parti — "after having left" / "after leaving"

The asymmetry is mirrored in the same-subject form: present infinitive after avant de (action not yet realized) vs. past infinitive after après (action realized).

Comparison table: temporal conjunctions and their moods

How French differs from English

English makes none of these distinctions morphologically. Before he leaves, after he leaves, until he leaves, while he leaves are all built with the same indicative form of the verb. The difference between "before" and "after" in English is purely lexical; the verb form is identical.

French, by contrast, marks the difference grammatically every single time. Avant qu'il parte (subjunctive) vs. après qu'il est parti (indicative) — the conjunction selects the mood, and the mood selects the morphology. English speakers must build the habit of pairing each conjunction with its mood deliberately.

A useful practice exercise: take any English sentence with "before" or "after" introducing a clause and translate it twice — once with avant que + subjunctive (or avant de + infinitive) and once with après que + indicative (or après + infinitive passé). The morphological contrast becomes visible.

Common Mistakes

Mistake 1: Using the indicative after avant que.

This is the most common temporal-conjunction error. The English mind reads "before he leaves" as a simple statement of an upcoming event and reaches for the indicative. The French mind treats the unrealized status as licensing the subjunctive. Drill avant qu'il parte, avant qu'il vienne, avant qu'il fasse, avant qu'il sache.

Mistake 2: Using the subjunctive after après que.

This is a tempting error because avant que takes the subjunctive — learners over-generalize and apply the same rule to après que. The fix: remember the asymmetry. Anteriority (before) → subjunctive; posteriority (after) → indicative.

Mistake 3: Using avant que + subjunctive when subjects match.

Same as with pour / pour que: same subject collapses, different subjects expand. Avant que je with the same matrix subject is not used.

Mistake 4: Translating "as soon as" with avant que.

Avant que points at an interval before an event; dès que / aussitôt que point at the moment of the event itself. They mean different things and take different moods.

Mistake 5: Forgetting the ne explétif is optional, not a negation.

The ne explétif (just ne, without pas) is a stylistic ne that does not negate the verb. Avant qu'il ne parte and avant qu'il parte both mean exactly the same thing. If you add pas, you create real negation: avant qu'il ne parte pas means "before he doesn't leave," which is rarely what anyone means.

Key takeaways

• Avant que, jusqu'à ce que, en attendant que, and d'ici à ce que trigger the subjunctive because the embedded action has not yet been realized at the reference point of the main clause.
• Après que prescriptively takes the indicative because the embedded action has already been realized — but you will increasingly hear the subjunctive in modern speech (Académie française condemns it; many speakers do it).
• The ne explétif with avant que (and several other conjunctions) is optional and carries no negative meaning. Avant qu'il (ne) parte — both versions are correct.
• Same-subject reductions: avant de
  • infinitive, en attendant de
    • infinitive, après
      • infinitive passé. Use them whenever the subjects match; do not produce avant que je with the same matrix subject.
• The avant que / après que asymmetry is one of the cleanest demonstrations of the French principle that the subjunctive marks unrealized, non-asserted events.
• Quand, lorsque, pendant que, dès que, aussitôt que, tant que all take the indicative — only the anteriority cluster (before / until / while waiting for) takes the subjunctive.