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

ByMichael Burns

Introduction to the verb dépolymériser

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The English translation of the French verb dépolymériser is “to depolymerize.” The infinitive form is pronounced “day-poh-lee-may-ree-zay.”

Dépolymériser is a combination of the prefix “dé-” meaning “to undo” and the verb “polymériser” meaning “to polymerize.” It is most commonly used in the field of chemistry to refer to the process of breaking down a polymer into smaller molecules.

In every day French, dépolymériser is often used in the Subjonctif Plus-que-parfait tense, which expresses a past action that may or may not have happened. It is typically used in conditional or hypothetical statements.

Example 1: Il aurait fallu que je dépolymérisasse le plastique avant de le recycler. (I would have had to depolymerize the plastic before recycling it.)
Example 2: Si tu avais dépolymérisé la colle, tu n’aurais pas eu de problèmes avec ton projet. (If you had depolymerized the glue, you wouldn’t have had any problems with your project.)
Example 3: Elle aurait aimé que nous dépolymérisassions les déchets avant de les jeter. (She would have liked us to depolymerize the waste before throwing it away.)

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

Pronoun Conjugation Example Usage English Translation
je eusse dépolymérisé J’aurais aimé que je eusse dépolymérisé. I wish I had depolymerized.
tu eusses dépolymérisé J’aurais aimé que tu eusses dépolymérisé. I wish you had depolymerized.
il eût dépolymérisé J’aurais aimé qu’il eût dépolymérisé. I wish he had depolymerized.
elle eût dépolymérisé J’aurais aimé qu’elle eût dépolymérisé. I wish she had depolymerized.
on eût dépolymérisé J’aurais aimé qu’on eût dépolymérisé. I wish one had depolymerized.
nous eussions dépolymérisé J’aurais aimé que nous eussions dépolymérisé. I wish we had depolymerized.
vous eussiez dépolymérisé J’aurais aimé que vous eussiez dépolymérisé. I wish you had depolymerized.
ils eussent dépolymérisé J’aurais aimé qu’ils eussent dépolymérisé. I wish they had depolymerized.
elles eussent dépolymérisé J’aurais aimé qu’elles eussent dépolymérisé. I wish they had depolymerized.

Other Conjugations for Dépolymériser.

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

    Imparfait (Imperfect) Tense Conjugation of the French Verb dépolymériser
   

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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Dépolymériser – 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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