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

ByMichael Burns

Introduction to the verb dératiser

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The English translation of the French verb dératiser is “to de-rat” or “to get rid of rats.” The infinitive form is pronounced as “day-rah-tee-zay.”

The word dératiser is derived from the French word “rat” which means “rat.” It comes from the Latin word “rattus,” which also means “rat.” In everyday French, dératiser is most often used in the Conditionnel Passé tense, which expresses actions that would have happened in the past if certain conditions had been met.

Here are three simple examples of dératiser used in the Conditionnel Passé tense, along with their English translations:

  1. Si j’avais su, j’aurais dératisé ma maison avant l’arrivée de la famille. (If I had known, I would have de-rat my house before the arrival of the family.)
  2. Nous aurions dératisé le restaurant s’il n’y avait pas eu de problème avec l’exterminateur. (We would have de-ratted the restaurant if there hadn’t been a problem with the exterminator.)
  3. Elle aurait dératisé son jardin si elle avait su qu’il y avait des rats. (She would have gotten rid of the rats in her garden if she had known they were there.)

In each of these examples, the verb dératiser is conjugated in the Conditionnel Passé tense to express an action that would have taken place in the past if certain conditions had been met.

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

Pronoun Conjugation Example Usage English Translation
je aurais dératisé J’aurais dératisé la maison. I would have exterminated the house.
tu aurais dératisé Tu aurais dératisé le grenier. You would have exterminated the attic.
il aurait dératisé Il aurait dératisé l’hôtel. He would have exterminated the hotel.
elle aurait dératisé Elle aurait dératisé sa cuisine. She would have exterminated her kitchen.
on aurait dératisé On aurait dératisé la cave. One would have exterminated the cellar.
nous aurions dératisé Nous aurions dératisé le restaurant. We would have exterminated the restaurant.
vous auriez dératisé Vous auriez dératisé la salle de bain. You would have exterminated the bathroom.
ils auraient dératisé Ils auraient dératisé l’école. They would have exterminated the school.
elles auraient dératisé Elles auraient dératisé leur jardin. They (female) would have exterminated their garden.

Other Conjugations for Dératiser.

    

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

    Imparfait (Imperfect) Tense Conjugation of the French Verb dératiser
     

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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


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Dératiser – 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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