Conditionnel Passé (Conditional Past) Tense Conjugation of the French Verb désulfiter

ByMichael Burns

Introduction to the verb désulfiter

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The English translation of the French verb désulfiter is “to desulfurize.” It is pronounced “day-sool-fee-tey” in the infinitive form.

The word désulfiter comes from the combination of the prefix “dés-” which means “to undo” or “to remove” and the word “sulfite” which refers to a compound of sulfur and oxygen. Together, they make the word désulfiter which literally means “to remove sulfur.”

In everyday French, désulfiter is most often used in the Conditionnel Passé tense, which is used to express a hypothetical action that would have happened in the past if certain conditions were met.

Some examples of its usage in this tense are:

  1. Si nous avions désulfité l’eau, elle aurait été plus propre. (If we had desulfurized the water, it would have been cleaner.)

  2. Tu aurais eu moins de problèmes si tu avais désulfité ton carburant. (You would have had fewer problems if you had desulfurized your fuel.)

  3. Ils auraient pu éviter cette catastrophe si ils avaient désulfité l’air. (They could have avoided this disaster if they had desulfurized the air.)

Table of the Conditionnel Passé (Conditional Past) Tense Conjugation of désulfiter

Pronoun Conjugation Example Usage English Translation
je aurais désulfité Si j’avais su, je t’aurais désulfité. I would have desulphurized you.
tu aurais désulfité Tu aurais désulfité cette eau. You would have desulphurized this water.
il aurait désulfité Il aurait désulfité le vin. He would have desulphurized the wine.
elle aurait désulfité Elle aurait désulfité pour le travail. She would have desulphurized for work.
on aurait désulfité On aurait désulfité l’air. One would have desulphurized the air.
nous aurions désulfité Nous aurions désulfité ensemble. We would have desulphurized together.
vous auriez désulfité Vous auriez désulfité avec eux. You would have desulphurized with them.
ils auraient désulfité Ils auraient désulfité le pétrole. They would have desulphurized the oil.
elles auraient désulfité Elles auraient désulfité l’eau. They (female) would have desulphurized the water.

Other Conjugations for Désulfiter.

    

    Le Present (Present Tense) Conjugation of the French Verb désulfiter
     

    Imparfait (Imperfect) Tense Conjugation of the French Verb désulfiter
     

    Passé Simple (Simple Past) Tense Conjugation of the French Verb désulfiter
     

    Passé Composé (Present Perfect) Tense Conjugation of the French Verb désulfiter
     

    Futur Simple (Simple Future) Tense Conjugation of the French Verb désulfiter
     

    Futur Proche (Near Future) Tense Conjugation of the French Verb désulfiter
     

    Plus-que-parfait (Pluperfect) Tense Conjugation of the French Verb désulfiter
     

    Passé Antérieur (Past Anterior) Tense Conjugation of the French Verb désulfiter

    Futur Antérieur (Future Anterior) Tense Conjugation of the French Verb désulfiter

    Subjonctif Présent (Subjunctive Present) Tense Conjugation of the French Verb désulfiter

    Subjonctif Passé (Subjunctive Past) Tense Conjugation of the French Verb désulfiter
     

    Subjonctif Imparfait (Subjunctive Imperfect) Tense Conjugation of the French Verb désulfiter

    Subjonctif Plus-que-parfait (Subjunctive Pluperfect) Tense Conjugation of the French Verb désulfiter
     

    Conditionnel Présent (Conditional Present) Tense Conjugation of the French Verb désulfiter
     

    Conditionnel Passé (Conditional Past) Tense Conjugation of the French Verb désulfiter  (this article)

    L’impératif Présent (Imperative Present) Tense Conjugation of the French Verb désulfiter

    L’infinitif Présent (Infinitive Present) Tense Conjugation of the French Verb désulfiter


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Désulfiter – About the French Conditionnel Passé (Conditional Past) Tense

The French “Conditionnel Passé” is a compound tense used to express hypothetical or unreal actions in the past. It is formed by combining the conditional of the auxiliary verb “avoir” or “être” and the past participle of the main verb.

NOTE: To take a deep dive into all the French tenses then see my article on Mastering French Tense Conjugation.

Formation

Start with the conditional of the auxiliary verb: For most verbs, use “aurais” (for “avoir”) or “serais” (for “être”) as the conditional form. 

With “avoir”: j’aurais, tu aurais, il/elle/on aurait, nous aurions, vous auriez, ils/elles auraient. 
With “être”: je serais, tu serais, il/elle/on serait, nous serions, vous seriez, ils/elles seraient. 

Add the past participle of the main verb to this conditional form. 
For example, if you want to say “I would have done,” you would use “j’aurais fait.” If you want to say “She would have gone,” you would use “elle serait allée.”

Common Everyday Usage Patterns

Expressing Unreal Past Scenarios

The Conditionnel Passé is often used to talk about actions that did not happen in the past, but you are speculating about what would have occurred if they had. It’s a way to discuss hypothetical situations in the past. 

Si j’avais su, je t’aurais aidé. (If I had known, I would have helped you.)
Il serait venu s’il avait eu le temps. (He would have come if he had had the time.) 

Polite Requests or Suggestions

It can be used to make polite requests or suggestions in the past. 

Pourriez-vous m’aider, s’il vous plaît ? (Could you have helped me, please?) 

Expressing Doubt or Uncertainty

It can convey doubt or uncertainty regarding past events.

Il aurait peut-être oublié notre rendez-vous. (He might have forgotten our appointment.)

Interactions with Other Tenses

Conditional Present

You can use the Conditionnel Passé in combination with the conditional present to describe past actions that were hypothetical at the time they were spoken about. J’aurais aimé que tu m’appelles hier. (I would have liked you to call me yesterday.) 

Indicative Past Tenses

You might use the Conditionnel Passé alongside indicative past tenses like the passé composé to contrast hypothetical and real past events. Il est venu hier, mais s’il avait pu, il serait venu la semaine dernière. (He came yesterday, but if he could have, he would have come last week.) 

Conditional Future

In some cases, you can use the Conditionnel Passé in combination with the conditional future to discuss unreal past events that could have consequences in the future. Si j’avais réussi mon examen, j’aurais un meilleur travail. (If I had passed my exam, I would have a better job.)

Summary

In summary, the Conditionnel Passé is used to express hypothetical or unreal actions in the past. It is often used in conjunction with other tenses to convey various nuances in French, allowing speakers to discuss imaginary past scenarios, make polite requests, or express doubt about past events.

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