The past subjunctive in French : complete course

This lesson explains the French past subjunctive, the tense used to describe a completed action in contexts that call for the subjunctive, such as doubt, emotion or necessity. You will see how it is formed from the present subjunctive of avoir or être plus a past participle, with examples comparing it to the present subjunctive, conjugation tables for parler, the situations where it is used, common mistakes to avoid, and a final summary.

1. What Is the Past Subjunctive?

The past subjunctive (le subjonctif passé) is a verb tense in French used to express a completed action in situations where the subjunctive mood is required. It combines the idea of doubt, emotion, or necessity with the fact that the action has already happened. Think of it as the “finished version” of the present subjunctive.

For example, instead of saying “I’m glad you are here” (present), you would say “I’m glad you came” → the action of coming is now in the past.

2. Simple Examples to Get Started

Here are a few quick examples to show the difference:

• 🟡 Present subjunctive: Je suis content que tu viennes. → I’m glad that you are coming.
• 🟢 Past subjunctive: Je suis content que tu sois venu(e). → I’m glad that you came.
• 🟡 Present subjunctive: Il faut que tu finisses ton travail. → You need to finish your work.
• 🟢 Past subjunctive: Il est dommage que tu n’aies pas fini ton travail. → It’s a shame that you didn’t finish your work.

3. The Key Elements of the Past Subjunctive in French

The past subjunctive is built from two parts. Understanding each part makes it much easier to use correctly.

3.1 How to Form It

The past subjunctive is formed using:

• The present subjunctive of the auxiliary verb (avoir or être)
• + the past participle of the main verb

Here is the formula:

Structure	Example with avoir	Example with être
Subjunctive of auxiliary + past participle	que j’aie mangé (that I ate)	que je sois parti(e) (that I left)

3.2 Conjugation Tables

Let’s look at full conjugations for two verbs: parler (to speak) with avoir, and partir (to leave) with être.

With avoir : parler (to speak)

Subject

Here is the full conjugation of parler. The auxiliary avoir changes with the subject, but the past participle parlé stays the same.

Subject	Past subjunctive	English
je	que j’aie parlé	that I spoke
tu	que tu aies parlé	that you spoke
il / elle / on	qu’il ait parlé	that he spoke
nous	que nous ayons parlé	that we spoke
vous	que vous ayez parlé	that you spoke
ils / elles	qu’ils aient parlé	that they spoke

With être : partir (to leave)

With être, the past participle agrees with the subject in gender and number: add -e for feminine and -s for plural.

Subject	Past subjunctive	English
je	que je sois parti(e)	that I left
tu	que tu sois parti(e)	that you left
il / elle / on	qu’il soit parti / qu’elle soit partie	that he / she left
nous	que nous soyons parti(e)s	that we left
vous	que vous soyez parti(e)(s)	that you left
ils / elles	qu’ils soient partis / qu’elles soient parties	that they left

Remember: the verbs that take être are the same as in the passé composé (aller, venir, partir, arriver, naître, mourir…) plus all reflexive verbs: que je me sois levé(e) (that I got up).

3.3 When to Use the Past Subjunctive

You use the past subjunctive in the same situations as the present subjunctive, but when the action in the subordinate clause happened before the action of the main verb.

• Emotions: Je regrette que tu aies raté le train. → I’m sorry that you missed the train.
• Doubt or uncertainty: Je doute qu’il ait compris. → I doubt that he understood.
• Necessity (action finished before a future moment): Il faut que tu aies fini avant midi. → You must have finished before noon.
• Some conjunctions: Bien qu’elle soit arrivée en retard, elle a réussi l’examen. → Although she arrived late, she passed the exam.
• After a superlative: C’est le meilleur film que j’aie jamais vu. → It’s the best film I have ever seen.

Compare the timing:

• Je suis triste qu’il parte. → I’m sad that he is leaving (now or soon).
• Je suis triste qu’il soit parti. → I’m sad that he has left (already done).

3.4 Common Mistakes to Avoid

• Using the passé composé instead of the subjunctive: say Je suis content que tu sois venu, not que tu es venu.
• Choosing the wrong auxiliary: partir takes être, so it is qu’il soit parti, not qu’il ait parti.
• Forgetting agreement with être: Je suis ravi que mes sœurs soient venues.
• Same subject in both clauses: when the subject does not change, use the past infinitive instead: Je suis content d’être venu (I’m glad I came), not que je sois venu.

3.5 Summary

The past subjunctive = present subjunctive of avoir or être + past participle. Use it after the usual subjunctive triggers (emotion, doubt, necessity, certain conjunctions) when the action is already completed. Learn the six forms of aie, aies, ait, ayons, ayez, aient and sois, sois, soit, soyons, soyez, soient, and you can form the past subjunctive of any verb.

4. Sources

• Bescherelle : conjugaison et grammaire
• Office québécois de la langue française : Vitrine linguistique
• Le Robert : dictionnaire en ligne