Acheter Conjugation in French: The Complete Guide with Tense Charts & Pronunciation

The verb acheter ("to buy") is a staple in French conversation. Whether you are ordering a croissant, shopping for clothes in Paris, or booking a train ticket, you will need this verb daily.

While acheter belongs to the regular -er verb family (the 1st group), it is officially classified as a stem-changing verb (or orthographic-changing verb). In this guide, our certified French teachers break down the conjugation of acheter across all essential tenses, explain the underlying pronunciation rule, and highlight common pitfalls.

Why Does "Acheter" Change Its Stem?

In French phonetics, having two consecutive "mute e" sounds (e caduc) creates an awkward flow. To maintain clear pronunciation, whenever the grammatical ending contains a silent "e", the neutral e in the stem (achet-) transforms into an open è (achèt-), pronounced like "set" or "bed" (/ɛ/).

  • When the ending is silent (-e, -es, -ent): e becomes è (e.g., j'achète).
  • When the ending is fully pronounced (-ons, -ez): e remains unchanged (e.g., nous achetons).

    • 1. Present Tense (Présent de l'indicatif)

The present tense clearly shows this boot-shaped stem change (singular subjects + 3rd person plural adopt the accent grave):

Subject Pronoun French Form Pronunciation (IPA) English Translation
:--- :--- :--- :---
J' achète [ʒa.ʃɛt] I buy / I am buying
Tu achètes [ty a.ʃɛt] You buy (informal)
Il / Elle / On achète [il / ɛl / ɔ̃ a.ʃɛt] He / She / One buys
Nous achetons [nu.za.ʃətɔ̃] We buy
Vous achetez [vu.za.ʃəte] You buy (formal/plural)
Ils / Elles achètent [il / ɛl a.ʃɛt] They buy

Key Note on Liaison: Make a liaison with plural pronouns: nous achetons sounds like "noo-zah-shuh-tohn".

2. Compound Past (Passé Composé)

Good news: in the passé composé, the auxiliary verb avoir carries the inflection. The past participle is acheté, which stays identical throughout and does not require an accent grave.

  • J'ai acheté (I bought / I have bought)
  • Tu as acheté (You bought)
  • Il/Elle/On a acheté (He/She bought)
  • Nous avons acheté (We bought)
  • Vous avez acheté (You bought)
  • Ils/Elles ont acheté (They bought)

Example: J'ai acheté deux billets de train pour Lyon. (I bought two train tickets to Lyon.)

3. Imperfect Tense (L'imparfait)

The imperfect describes continuous, habitual, or background actions in the past. Because the endings (-ais, -ait, -ions, -iez, -aient) are all pronounced syllables, the stem remains achet- throughout:

  • J'achetais
  • Tu achetais
  • Il / Elle achetait
  • Nous achetions
  • Vous achetiez
  • Ils / Elles achetaient

Example: Quand nous habitions à Bordeaux, nous achetions des canelés chaque dimanche. (When we lived in Bordeaux, we used to buy canelés every Sunday.)

4. Simple Future & Conditional Present

Unlike the present tense where only four forms change, in the Futur Simple and Conditionnel, the stem retains the accent grave (achèt-) across all persons because the syllable following the stem is phonetically reduced.

Futur Simple

  • J'achèterai (I will buy)
  • Tu achèteras (You will buy)
  • Il/Elle achètera (He/She will buy)
  • Nous achèterons (We will buy)
  • Vous achèterez (You will buy)
  • Ils/Elles achèteront (They will buy)

    • Conditionnel Présent

  • J'achèterais (I would buy)
  • Tu achèterais (You would buy)
  • Il/Elle achèterait (He/She would buy)
  • Nous achèterions (We would buy)
  • Vous achèteriez (You would buy)
  • Ils/Elles achèteraient (They would buy)

    • 5. Present Subjunctive (Subjonctif Présent)

The subjunctive mood follows the exact same pattern as the present indicative:

  • Que j'achète
  • Que tu achètes
  • Qu'il / elle achète
  • Que nous achetions
  • Que vous achetiez
  • Qu'ils / elles achètent

Example: Il est impératif que vous achetiez vos entrées en ligne. (It is imperative that you buy your tickets online.)

6. Imperative (Impératif)

Used for commands and requests:

  • Achète ! (Buy! - singular informal; notice no final 's')
  • Achetons ! (Let's buy!)
  • Achetez ! (Buy! - plural/formal)

    • 3 Common Mistakes to Avoid

1. Adding an 's' to the imperative singular: Do not write achètes !; the correct form is achète !.

2. Forgetting the accent in the future: Writing j'acheterai is incorrect. Always write j'achèterai.

3. Confusing racheter and acheter: The prefix re- follows identical rules (je rachète, nous rachetons).

By mastering the stem-change rule for acheter, you unlock dozens of other French verbs that follow the identical phonetic pattern, including mener (to lead), lever (to raise), and peser (to weigh).