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

ByMichael Burns

Introduction to the verb désulfurer

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The English translation of the French verb désulfurer is “to desulfurize.” It is pronounced “day-sool-fuh-rer.”

The word désulfurer is derived from the French word “soufre” which means “sulfur.” The prefix “dé-” means “remove” or “de-” in English, and the suffix “-er” is a common verb ending in French. Therefore, désulfurer literally means “to remove sulfur.”

In everyday French, désulfurer is most often used in the Subjonctif Passé tense, which expresses a possibility or uncertainty in the past. It is usually used in conjunction with a conjugated form of the auxiliary verb “avoir.”

Three simple examples of its usage in this tense are:

  1. J’espère que tu aies désulfuré le carburant avant de le mettre dans le moteur. (I hope you desulfurized the fuel before putting it in the engine.)

  2. Il fallait que nous ayons désulfuré le gaz avant de l’utiliser pour la cuisson. (We had to desulfurize the gas before using it for cooking.)

  3. Je doute qu’ils aient désulfuré les émissions de leur usine avant de les rejeter dans l’air. (I doubt they desulfurized the emissions from their factory before releasing them into the air.)

Table of the Subjonctif Passé (Subjunctive Past) Tense Conjugation of désulfurer

Pronoun Conjugation Example Usage English Translation
je aie désulfuré Il est possible que j’aie désulfuré le moteur. It’s possible that I desulfurized the engine.
tu aies désulfuré Il faut que tu aies désulfuré ce carburant. You must have desulfurized this fuel.
il ait désulfuré Il est important qu’il ait désulfuré l’essence. It’s important that he desulfurized the gasoline.
elle ait désulfuré Elle craint qu’elle ait désulfuré le carburant. She fears she desulfurized the fuel.
on ait désulfuré On veut qu’on ait désulfuré le diesel. We want the diesel to have been desulfurized.
nous ayons désulfuré Il est possible que nous ayons désulfuré ce pétrole. It’s possible that we desulfurized this oil.
vous ayez désulfuré Il est important que vous ayez désulfuré le carburant. It’s important that you desulfurized the fuel.
ils aient désulfuré Il faut qu’ils aient désulfuré ce gaz. They must have desulfurized this gas.
elles aient désulfuré Elles préfèrent qu’elles aient désulfuré le carburant. They prefer they desulfurized the fuel.

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     (this article)

    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

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

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

    Struggling with French verbs or the language in general? Why not use our free French Grammar Checker – no registration required!
   

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Désulfurer – About the French Subjonctif Passé (Subjunctive Past) Tense

The French Subjonctif Passé is a verb tense used to express actions or states that are uncertain, hypothetical, or dependent on some condition in the past. It’s often used in conjunction with the main verb in the present or future tense to convey various nuances of doubt, desire, necessity, or emotion.

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

Formation of the Subjonctif Passé

To form the Subjonctif Passé, you generally need to start with the third person plural (ils/elles) form of the passé composé (a compound past tense). Then, drop the subject and replace it with the appropriate Subjonctif endings. The endings are the same for regular -er, -ir, and -re verbs:

   – For -er verbs: -e, -es, -e, -ions, -iez, -ent
   – For -ir verbs: -isse, -isses, -ît, -issions, -issiez, -issent
   – For -re verbs: -e, -es, -e, -ions, -iez, -ent

For example, if you have the verb “parler” (to speak) in the third person plural passé composé, which is “ils ont parlé” (they spoke), the Subjonctif Passé form would be “qu’ils aient parlé” (that they spoke).

Everyday Usage Patterns

The Subjonctif Passé is commonly used in various situations:

– Expressing doubt or uncertainty: It’s used when you’re not certain about the completion of an action in the past. For example, “Je doute qu’il ait mangé” (I doubt that he ate).

– Desires and preferences: When you want or wish for something to have happened in the past. For instance, “Je préfère que tu aies réussi” (I prefer that you have succeeded).

– Expressing emotions: To convey emotions or feelings related to past actions or events. For example, “Il est content que nous ayons gagné” (He is happy that we won).

– Hypothetical situations: When discussing hypothetical or unreal past situations. For example, “Si j’avais su, j’aurais souhaité qu’ils aient été là” (If I had known, I would have wished they had been there).

Interactions with Other Tenses

The Subjonctif Passé often interacts with other tenses to convey specific meanings:

Present tense

It’s commonly used after expressions of doubt, desire, necessity, or emotion in the present. For example, “Il faut que tu aies fini” (You must have finished).

Future tense

It’s used in the future for hypothetical or unreal actions in the past when the main clause is in the future. For example, “Je douterai qu’ils aient terminé demain” (I will doubt that they have finished tomorrow).

Conditional

When the main clause is in the conditional, the Subjonctif Passé can be used to express unreal or hypothetical actions in the past. For instance, “Il voudrait que nous ayons réussi” (He would like us to have succeeded).

Summary

The Subjonctif Passé is a versatile tense used in French to convey uncertainty, doubt, desire, or hypothetical situations related to past actions. It is used in various everyday contexts and interacts with other tenses to express specific nuances in the language.

I hope you enjoyed this article on the verb désulfurer. Still in a learning mood? Check out another TOTALLY random French verb conjugation!

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