Imparfait (Imperfect) Tense Conjugation of the French Verb diéséliser

ByMichael Burns

Introduction to the verb diéséliser

Get the imperfect (imparfait) tense conjugation of diéséliser. Includes a FREE downloadable reference sheet (no email required). Alternatively if you have a lot of text to check then use our free French Grammar Checker – no registration required!

The English translation of the French verb diéséliser is “to convert to diesel.” The infinitive form diéséliser is pronounced as “dee-eh-zeh-lee-zay.”

The word diéséliser is derived from the noun “diesel,” which originates from the name of its inventor, Rudolf Diesel. In everyday French, diéséliser is commonly used in the imparfait tense to describe the conversion of something to diesel fuel. It is often used when talking about vehicles, engines, or machines being modified or adapted to run on diesel fuel.

Here are three examples of diéséliser in the imparfait tense and their respective English translations:

  1. Nous diésélisions notre flotte de camions. (We were converting our truck fleet to diesel.)
  2. Tu diésélisais ton moteur pour économiser du carburant. (You were converting your engine to diesel to save on fuel.)
  3. Ils diésélisaient leurs machines industrielles pour réduire les émissions de gaz. (They were converting their industrial machines to diesel to reduce gas emissions.)

Table of the Imparfait (Imperfect) Tense Conjugation of diéséliser

Pronoun Conjugation Short Example English Translation
je diésélisais Je diésélisais ma voiture. I was dieselizing my car.
tu diésélisais Tu diésélisais ton camion. You were dieselizing your truck.
il diésélisait Il diésélisait le moteur. He was dieselizing the engine.
elle diésélisait Elle diésélisait son bateau. She was dieselizing her boat.
on diésélisait On diésélisait les machines. We were dieselizing the machines.
nous diésélisions Nous diésélisions nos véhicules. We were dieselizing our vehicles.
vous diésélisiez Vous diésélisiez les moteurs. You were dieselizing the engines.
ils diésélisaient Ils diésélisaient les camions. They were dieselizing the trucks.
elles diésélisaient Elles diésélisaient les voitures. They were dieselizing the cars.

Other Conjugations for Diéséliser.

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

Imparfait (Imperfect) Tense Conjugation of the French Verb diéséliser (You’re reading it right now!)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

L’impératif Passé (Imperative Past) Tense Conjugation of the French Verb diéséliser

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

L’infinitif Passé (Infinitive Past) Tense Conjugation of the French Verb diéséliser

Le Participe Présent (Present Participle) Tense Conjugation of the French Verb diéséliser

Le Participe Passé (Past Participle) Tense Conjugation of the French Verb diéséliser

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Diéséliser – About the French Imparfait Tense

The French imparfait tense, often called the imperfect tense in English, is used to describe actions or states in the past. It’s primarily used to provide background information, set the scene, or describe habitual or ongoing actions in the past.

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

Formation of the Imparfait Tense

To form the imparfait tense in French, you typically take the present tense nous form of the verb, drop the -ons ending, and add specific endings based on the verb group (regular -er, -ir, -re verbs) or use irregular forms for certain verbs.  

For regular -er verbs:

Take the infinitive form (e.g., parler, finir, rendre) Remove the -er ending Add the imparfait endings: -ais, -ais, -ait, -ions, -iez, -aient 

For regular -ir verbs

Take the infinitive form (e.g., choisir, grandir, finir) Remove the -ir ending Add the imparfait endings: -issais, -issais, -issait, -issions, -issiez, -issaient 

For regular -re verbs

Take the infinitive form (e.g., vendre, attendre, entendre) Remove the -re ending Add the imparfait endings: -ais, -ais, -ait, -ions, -iez, -aient

Common Everyday Usage Patterns

Description of Past Habits

The imparfait is often used to describe habitual actions or situations in the past. For example: “Quand j’étais enfant, je jouais au football tous les jours.” (When I was a child, I used to play football every day.) 

Background Information

It’s used to provide background information or set the stage for a main event in the past. For instance: “Il faisait beau ce jour-là.” (The weather was nice that day.) 

Mental and Emotional States

It’s employed to express emotions, thoughts, or physical sensations in the past. For example: “J’étais content quand il est arrivé.” (I was happy when he arrived.) 

Ongoing Actions

The imparfait describes actions that were in progress or happening when something else occurred in the past. For instance: “Je lisais un livre quand le téléphone a sonné.” (I was reading a book when the phone rang.)

Points to Note About the Imparfait Tense

Passé Composé vs. Imparfait

The imparfait and passé composé (a compound past tense) are often used together to express the completion of an action in the past (passé composé) and provide context or background (imparfait). For example: “Il regardait la télévision quand son ami est arrivé.” (He was watching TV when his friend arrived.) 

Conditional

The imparfait is used as the base for forming the conditional mood in French. For instance, “Je mangerais” (I would eat) is formed from “je mangeais” (I was eating). 

Si Clauses

In hypothetical or “if” clauses (si clauses), the imparfait is often used to express a condition in the past. For example: “Si j’avais de l’argent, j’achèterais une nouvelle voiture.” (If I had money, I would buy a new car.) 

Narration

In storytelling or writing, the imparfait is frequently used to set the scene and describe ongoing actions while the passé composé is used for specific events or actions that interrupted the ongoing ones.
Understanding the French imperfect tense is crucial for effective communication in French. Without it, your conversations will always live in the present!

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

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