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

ByMichael Burns

Introduction to the verb désulfurer

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The English translation of désulfurer is “to desulfurize.” It is pronounced “day-sul-fu-ray.”

The language origin of désulfurer is French, specifically from the root words “désulfur” meaning sulfur and the verb suffix “-er.” It is most often used in every day French in the Conditionnel Passé tense, which is used to express a hypothetical or possible action in the past.

Examples:

  1. Si j’avais eu plus de temps, j’aurais désulfuré le moteur. (If I had had more time, I would have desulfurized the engine.)
  2. Il aurait été plus efficace de désulfurer le charbon avant de le brûler. (It would have been more efficient to desulfurize the coal before burning it.)
  3. Nous serions allés plus vite si nous avions désulfuré le carburant. (We would have gone faster if we had desulfurized the fuel.)

In each of these examples, the Conditionnel Passé tense is used to express a potential action in the past. The phrase “j’aurais désulfuré” can be broken down to “j’aurais” (I would have) and “désulfuré” (desulfurized). Similarly, “aurait été” can be translated as “would have been” and “serions allés” as “we would have gone.”

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

Pronoun Conjugation Example Usage English Translation
je aurais désulfuré Si j’avais su, je l’aurais désulfuré. I would have desulfurized it if I had known.
tu aurais désulfuré Tu aurais désulfuré le moteur. You would have desulfurized the engine.
il aurait désulfuré Il aurait désulfuré le carburant. He would have desulfurized the fuel.
elle aurait désulfuré Elle aurait désulfuré l’eau. She would have desulfurized the water.
on aurait désulfuré On aurait désulfuré l’air. One would have desulfurized the air.
nous aurions désulfuré Nous aurions désulfuré la terre. We would have desulfurized the land.
vous auriez désulfuré Vous auriez désulfuré la maison. You would have desulfurized the house.
ils auraient désulfuré Ils auraient désulfuré l’usine. They would have desulfurized the factory.
elles auraient désulfuré Elles auraient désulfuré les bâtiments. They (female) would have desulfurized the buildings.

Other Conjugations for Désulfurer.

    

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

    Imparfait (Imperfect) Tense Conjugation of the French Verb désulfurer
     

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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


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Désulfurer – 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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