Humanities Languages How to Conjugate the Regular French Verb 'Acheter' ('To Buy') A Stem-Changing Verb Share Flipboard Email Print Daly and Newton Languages French Grammar Basics Pronunciation & Conversation Vocabulary Resources for Teachers English as a Second Language Spanish German Italian Japanese Mandarin Russian English Grammar View More by ThoughtCo Updated February 02, 2019 'Achete' ("to buy") is a very common French stem-changing verb. It is a verb that has two different stems but is conjugated with the same endings as regular -er verbs. Stem-changing verbs are sometimes also called boot verbs or shoe verbs because if you circle the forms that have stem changes in the conjugation table below, the resulting shape looks like a boot or shoe. The Actual Stem Change For the present tense of verbs that end in -e_er ( _ indicates one or more consonants), the stem change consists of changing the e before that consonant to è in all forms but nous and vous. See this happen in the table below. Stem changes are not limited to the present tense; they occur across several French tenses and moods, as shown in the table below. Note that the table below has only the simple conjugations of the verb acheter; it does not include the compound tenses, which consist of a form of the auxiliary verb and the past participle. Common '-e_er' Stem-Changing Verbs acheter > to buy amener > to take emmener > to take enlever > to remove geler > to freeze harceler > o harass lever > to lift, raise mener > to lead peler > to peel peser > to weigh promener > to walk Other than acheter, geler, harceler and peler, most verbs that end in -eler and -eter are part of a different stem-change group that includes -eler verbs and -eter verbs. Verbs that end in -é_er have a similar stem change. For the present tense of verbs that end in -é_er, the stem change consists of changing é to è in all forms but nous and vous, as in the following example: je considère nous considérons tu considères vous considérez il considère ils considèrent Common '-é_er' Stem-Changing Verbs céder > to give up, dispose of célébrer > to celebrate compléter > to complete considérer > to consider différer > to differ espérer > to hope exagérer* > to exaggerate gérer > to manage inquiéter > to worry modérer > to moderate pénétrer > to enter posséder > to possess préférer > to prefer protéger* > to protect refléter > to reflect répéter > to repeat révéler > to reveal suggérer > to suggest zébrer > to stripe*These are also spelling change verbs. Verbs that end in -e_er have a similar stem change. For -e_er verbs and -é_er verbs, the penultimate e takes on or changes to è. Simple Conjugations of the French Stem-Changing Verb 'Acheter' Present Future Imperfect Present participle j' achète achèterai achetais achetant tu achètes achèteras achetais il achète achètera achetait nous achetons achèterons achetions vous achetez achèterez achetiez ils achètent achèteront achetaient Passé composé Auxiliary verb avoir Past participle acheté Subjunctive Conditional Passé simple Imperfect subjunctive j' achète achèterais achetai achetasse tu achètes achèterais achetas achetasses il achète achèterait acheta achetât nous achetions achèterions achetâmes achetassions vous achetiez achèteriez achetâtes achetassiez ils achètent achèteraient achetèrent achetassent Imperative tu achète nous achetons vous achetez Continue Reading How to Conjugate the Stem-Changing French Verb 'Envoyer' ('to Send') All About the Regular French Verb 'Laisser' ('to Leave, to Lose') How to Conjugate -E_ER - French Verbs How to Conjugate the French Verb "Promener" (to Walk) How to Conjugate the French Stem-Changing Verb 'Épeler' How to Conjugate the French Verb Étudier ('to Study) Overview of French Stem-Changing Verbs Can You "Attain" Perfection in the Conjugates of "Accéder"? Simple conjugations for the French verb préférer - to prefer Simple Conjugations for the French Verb "Appeler" Conjugating the French Verb "Considérer" (to Consider) How to Conjugate the French Regular '-er' Verb 'Montrer' ('to Show') Conjugating Regular French Verbs in the Subjunctive How to Conjugate the French Verb "Payer" (to Pay) Learn to Conjugate the French Verb "Nettoyer" Conjugations and Expressions of the French Verb 'Finir'