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

ByMichael Burns

Introduction to the verb décontaminer

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The English translation of the French verb décontaminer is “to decontaminate” or “to disinfect.” The infinitive form is pronounced as “day-kon-ta-mee-nay.”

Décontaminer comes from the French word “contaminer,” meaning “to contaminate,” with the prefix “de-” meaning “to remove.” It is most often used in everyday French to describe the act of removing harmful substances or pollutants from a surface or environment.

In the Subjonctif Plus-que-parfait tense, décontaminer is used to express a hypothetical action that took place before another past action. It is formed by using the past subjunctive form of the auxiliary verb “avoir” or “être” followed by the past participle of décontaminer.

Here are three examples of décontaminer used in the Subjonctif Plus-que-parfait tense with their English translations:

  1. J’aurais aimé que tu aies décontaminé ta maison avant que les enfants n’arrivent. (I would have liked for you to have decontaminated your house before the children arrived.)
  2. Il fallait que nous soyons allés décontaminer la rivière avant que le gouvernement ne prenne des mesures. (We had to have gone to decontaminate the river before the government took action.)
  3. Il aurait fallu que vous ayez décontaminé vos mains avant de toucher les aliments. (You should have decontaminated your hands before touching the food.)

Table of the Subjonctif Plus-que-parfait (Subjunctive Pluperfect) Tense Conjugation of décontaminer

Pronoun Conjugation Example Usage English Translation
je eusse décontaminé Il est important que je eusse décontaminé. It is important that I had decontaminated.
tu eusses décontaminé Il est important que tu eusses décontaminé. It is important that you had decontaminated.
il eût décontaminé Il est important qu’il eût décontaminé. It is important that he had decontaminated.
elle eût décontaminé Il est important qu’elle eût décontaminé. It is important that she had decontaminated.
on eût décontaminé Il est important qu’on eût décontaminé. It is important that one had decontaminated.
nous eussions décontaminé Il est important que nous eussions décontaminé. It is important that we had decontaminated.
vous eussiez décontaminé Il est important que vous eussiez décontaminé. It is important that you had decontaminated.
ils eussent décontaminé Il est important qu’ils eussent décontaminé. It is important that they had decontaminated.
elles eussent décontaminé Il est important qu’elles eussent décontaminé. It is important that they had decontaminated.

Other Conjugations for Décontaminer.

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

    Imparfait (Imperfect) Tense Conjugation of the French Verb décontaminer
   

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    L’infinitif Présent (Infinitive Present) Tense Conjugation of the French Verb décontaminer
    (this article)

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Décontaminer – About the French Subjonctif Plus-que-parfait (Subjunctive Pluperfect) Tense

The French Subjonctif Plus-que-parfait, also known as the Pluperfect Subjunctive, is a verb tense used to express actions or states that occurred before another action in the past, and it’s used in situations where the indicative mood is in the past subjunctive or conditional mood.
NOTE: To take a deep dive into all the French tenses then see my article on Mastering French Tense Conjugation.

Formation

To form the Subjonctif Plus-que-parfait, you start with the imperfect subjunctive form of the auxiliary verb “avoir” or “être,” followed by the past participle of the main verb. 
For “avoir” verbs: Take the imperfect subjunctive form of “avoir” (e.g., j’eusse, tu eusses, il/elle eût, nous eussions, vous eussiez, ils/elles eussent). Add the past participle of the main verb. 
For “être” verbs: Take the imperfect subjunctive form of “être” (e.g., je fusse, tu fusses, il/elle fût, nous fussions, vous fussiez, ils/elles fussent). Add the past participle of the main verb.

Common Everyday Usage Patterns

Hypothetical Situations

The Subjonctif Plus-que-parfait is often used to express hypothetical or unreal actions that occurred before another past action.
For example: J’aurais aimé que tu aies fini ton travail avant que je sois arrivé. (I would have liked for you to have finished your work before I arrived.) 

Reported Speech

In reported speech, you may use the Subjonctif Plus-que-parfait to convey what someone said or thought in the past. 
For example: Il m’a dit qu’il avait peur que je n’aie pas compris. (He told me that he was afraid that I hadn’t understood.) 

Doubt, Wishes, and Emotions

This tense can also be used to express doubt, wishes, and emotions about past actions. 
For example: Je doutais qu’il eût dit la vérité. (I doubted that he had told the truth.) 
J’aurais souhaité que tu fusses venu. (I would have wished for you to have come.)

Interactions with Other Tenses

Present Subjunctive

The Subjonctif Plus-que-parfait can be used to describe past actions when the main verb is in the present subjunctive. 
For example: “Il faut que j’aie fini mon travail avant que tu partes.” (I must have finished my work before you leave.) 

Imperfect Subjunctive

It’s common to use the Subjonctif Plus-que-parfait with the imperfect subjunctive in complex sentences. 
For example: “Il m’avait dit qu’il fût rentré avant la fin de la journée.” (He had told me that he had returned before the end of the day.) 

Conditional

When the main verb is in the conditional mood, the Subjonctif Plus-que-parfait can be used to express past unreal conditions. 
For example: “Si j’avais su, j’aurais voulu que tu aies réussi.” (If I had known, I would have wanted you to have succeeded.)

Summary

The Subjonctif Plus-que-parfait is a complex tense used to convey nuanced meanings in French. While its usage may seem intricate, it becomes more intuitive with practice and exposure to the language. It’s important to understand the context in which it’s used, as it often conveys subtleties of time, conditionality, and emotion in French sentences.

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