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How to form and use the past conditional in French?

By: Agnés Finot

The past conditional (le conditionnel passé) is a compound tense used to state conditions in the past; it is formed with the auxiliary avoir meaning to have or être meaning to be, conjugated in the French present conditional , along with a past participle.

The conditional is a mood, and in the past tense it is used to express hypothetical statements, to say what would have happened or might have happened in the past. It is the equivalent of “would have,” “could have,” or “should have” + the past participle. For example:

J’aurais mangé plus tôt.
Translation: I would have eaten earlier.

In this post, we’ll cover how to form the past conditional in French, along with when to use it. Let’s get started!

How to form the past conditional in French?

To form the past conditional, you will follow the rules for compound tenses in French, using an auxiliary verb (avoir or être) and a past participle. You likely already know one of the most common French compound tenses: the passé composé. Like the passé composé, the past conditional in French follows many of the same compound tense rules.

Take a look at the passé composé and past conditional side by side. Can you see the difference?

Passé composé
j’ai compris meaning I understood
elle est partie meaning she left
nous sommes venus meaning we came
elles sont sorties meaning they (fem.) went out
Past conditional
j’aurais compris meaning I would have understood
elle serait partie meaning she would have left
nous serions venus meaning we would have come
elles seraient sorties meaning they would have gone out

Typically, only the conjugation of the auxiliary verb changes between compound tenses. To form the past conditional in French, the auxiliary verb is conjugated in the present conditional tense.

auxiliary avoir / être
(conjugated in the present conditional)

past participle

Here are the three steps to form the conditionnel passé meaning past conditional.

  • Step 1 - Choose if you are using the auxiliary avoir meaning to have or être meaning to be:

    reflexive verbs in French, verbs of movement like aller meaning to go, venir meaning to come, or partir meaning to leave, and some verbs of change of state/condition, like devenir meaning to become, or partir meaning to leave, take the auxiliary être. All other verbs will use avoir. Learn the French verbs which require the auxiliary être and you'll be well on your way to conjugating the past conditional!

  • Step 2 - Conjugate the auxiliary in the French present conditional:

    Avoir conjugation
    j’aurais meaning I would have
    tu aurais meaning you would have
    il, elle, on aurait meaning he/she/we (inf.) would have
    nous aurions meaning we would have
    vous auriez meaning you would have
    ils, elles auraient meaning they would have
    Être conjugation
    je serais meaning I would be
    tu serais meaning you would be
    il, elle, on serait meaning he/she/we (inf.) would be
    nous serions meaning we would be
    vous seriez meaning you would be
    ils/elles seraient meaning they would be
  • Step 3 - Add the past participle of the verb:

    The past participle follows the same rules of agreement in French as in all compound tenses. Here is a recap of the main rules:

    • With être, the past participle agrees in number (singular/plural) and gender (masculine/feminine) with the subject.

      Elle serait partie à 18h.
      Translation: She would have left at 6 pm.
      Les invités seraient montés au troisième étage.
      Translation: The guest would have gone up to the fourth story.
      Toutes les feuilles se seraient envolées avec le vent.
      Translation: All the leaves would have flown away with the wind.
    • Generally, there is no agreement of the past participle with the auxiliary avoir, unless the direct object is placed before the verb.

      direct object
      Pauline aurait acheté cette bague ancienne chez un antiquaire.
      Translation: Pauline would have bought this ancient ring from an antique dealer.
      La bague ancienne que Pauline aurait achetée chez un antiquaire vaut 600 €.
      Translation: The ancient ring that Pauline would have bought from an antique dealer is worth 600€.

Now that you know how to form the past conditional, let’s look at when you should use it.

When to use the past conditional in French?

Use the past conditional to express regrets, reproach, and imaginary scenarios in the past that can no longer happen, or to describe hypothetical situations using si meaning if. When you use the conditional in this tense, there is a sense of helplessness, regret, or relief, as there is nothing you can do to change what happened or didn't happen.

Let’s have a look at the uses in more detail.

  • With a hypothetical si meaning if construction in French, to mark a condition: if something had happened in the past, then another event could have occurred.

    si

    pluperfect

    past conditional

    Si tu avais étudié plus, tu aurais eu de meilleurs résultats à ton examen.
    Translation: If you had studied more, you would have had better results on your exam.
    Si nous étions arrivés plus tôt, ils ne seraient pas partis sans nous !
    Translation: If we had arrived earlier, they wouldn’t have left without us!
  • To express regrets, to mention an event that could have happened…or not have happened

    past conditional
    J'aurais pu gagner, mais je n’ai pas joué
    Translation: I could have won, but I didn’t play!
    Vous n’auriez pas déménagé tous vos meubles avec seulement votre voiture.
    Translation: You wouldn’t have moved all your furniture with your car only.
  • To wish you would have done or not done something

    Elle aurait voulu faire des études de journalisme.
    Translation: She would have liked to study journalism.
    Je n'aurai pas poursuivre ma carrière après la naissance de mes enfants.
    Translation: I should not have continued my career after my children were born.
    Nous aurions préféré habiter à la campagne.
    Translation: We would have preferred to live in the countryside.
  • To express reproach or reprimand someone for something they could/should have done, using devoir meaning must, to have to and pouvoir meaning can, to be able to

    Tu n'aurai pas distribuer tous ces prospectus ?
    Translation: Shouldn’t you have handed out all of these leaflets?
    Vous auriez pu ramasser les crottes de votre chien ! 💩
    Translation: You could have picked up your dog’s mess!
  • To make assumptions or show uncertainty when reporting a fact asserted by someone else. This is especially the case with journalists and reporters who may be awaiting confirmation or may not agree with the facts.

    L’accident aurait eu lieu entre deux heures et trois heures du matin.
    Translation: The accident must have taken place between 2 am and 3 am.
  • To use reported speech in French that is presented in the past conditional, keep it in the past conditional!

    Direct speech:

    On aurait aimé vous accompagner !
    Translation: We would have liked to come with you!

    Indirect speech:

    Ils ont dit qu’ils auraient aimé nous accompagner.
    Translation: They said they would have liked to come with us.

    If the direct speech is presented in the French future perfect, then the reported speech will be in the past conditional.

    Direct speech:

    future perfect
    “J’enverrai un texto dès que je serai rentrée"
    Translation: I’ll send a text as soon as I get home.

    Indirect speech:

    Elle a dit qu’elle enverrait un texto dès qu’elle serait rentrée.
    Translation: She said she would send a text as soon as she got home.

Before reviewing the main points, would you like to test your knowledge of the French past conditional?

Let’s recap

When using the past conditional in French, keep the following tips in mind:

  • Use the past conditional when you want to say something “would have,” “could have,” or “should have” happened in the past.

  • Most of the time, you will use it with a si clause.

  • Conjugate the past conditional the same way you would construct the passé composé, except the auxiliary (être or avoir) must be conjugated in the present conditional.

  • The past participle agrees with the subject when you are using the auxiliary être.

  • There is no agreement of the past participle with the auxiliary avoir, except if the direct object is before the verb or using a direct object pronoun.

Meet the Author

Agnés Finot

Agnés Finot

Agnès Finot is an experienced French teacher with a lifelong curiosity for languages and cultures. She enjoys connecting with students of all ages from diverse backgrounds and learning about their traditions and customs. When she is not teaching, she enjoys baking and practicing pilates, and she has an interest in AI and language acquisition.

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