In the case where the verb ends in a vowel while the subject starts with one, a "t" needs to be inserted to avoid elision.
Example: Did she make the decision already? (She made the decision already.) A-t-elle déjà pris la décision ? (Elle a déjà pris la décision.)
(Notice that for compound tense [les temps composés], only the avoir or être part is interchanged with the subject.)
For third person plural (verbs ending in "ent"), there is no need to insert the "t".
Example: Are they buying a house? (They are buying a house.)
Achètent-ils une maison ? (Ils achètent une maison.)
If the subject is a noun instead of a pronoun, invert the verb and the pronoun that represents the subject.
Example: Did Marie choose this shirt? (Marie chose this shirt.)
'Marie a-t-elle choisi cette chemise ? (Marie a choisi cette chemise.) For negative such as "ne...pas", the verb should be inserted in between: Example: Didn't you eat the whole pizza? (You didn't eat the whole pizza.) N'as-tu pas mangé la pizza entière ? (Tu n'as pas mangé la pizza entière.) If there is a direct or indirect object (complément d'objet [in]direct), it goes before the verb.
Example: Have you been there? (You have been there.)
Y es-tu allé(e) ? (Tu y es allé(e).)
Question words
Où ? - Where?
Quand ? - When?
Pourquoi ? - Why?
Comment ? - How?
Quel/Quels/Quelle/Quelles ? - Which?
Qui ? - Who?
Combien ? - How much?
Quoi ? - What?
Commands
Main article: French/Grammar/Tenses/Imperative
Tenses
Verb tenses sorted by mood
Non-finite forms
Le participe présent (The Present Participle)
Le participe passé (The Past Participle)
Le Verbe Auxiliaire (The Auxiliary Verb)
L'infinitif (The Infinitive)
L'infinitif passé (The Past Infinitive)
L'indicatif (The indicative mood)
Simple tenses
Le présent de l'indicatif (The present indicative)
L'imparfait de l'indicatif (The imperfect)
Le passé simple (The past historic)
Le futur (The future)
Perfect tenses
Le passé composé (The present perfect)
Le plus-que-parfait de l'indicatif (The pluperfect of the indicative)
Le passé antérieur (The past anterior)
Le futur antérieur (The future anterior)
Other tenses
Le passé récent (The recent past)
Le futur proche (The near future)
Le subjonctif (The subjunctive mood)
Le subjonctif (The subjunctive)
L'imparfait du subjonctif (The imperfect subjunctive)
Le subjonctif passé (The past subjunctive)
Le plus-que-parfait du subjonctif (The pluperfect subjunctive)
L'impératif (The imperative mood)
L'impératif (The imperative)
L'impératif passé (The past imperative)
Le conditionnel (The conditional mood)
Le conditionnel (The conditional)
Le conditionnel passé (The past conditional)
Le deuxième forme du conditionnel passé (The second form of the past conditional) Verb tenses sorted by type
Simple tenses
Le présent de l'indicatif (The present indicative)
L'imparfait de l'indicatif (The imperfect)
Le passé simple (The past historic)
Le futur (The future)
Le conditionnel (The conditional)
Le présent du subjonctif (The present subjunctive)
L'imparfait du subjonctif (The imperfect subjunctive)
Perfect tenses
