The verb faire, conjugated in the second person singular, takes an -s in the imperative: “fais”. The form “fait”, without -s, corresponds to the third person of the indicative or the past participle. The difficulty lies in the fact that both are pronounced the same way. This homophony explains why the confusion persists well beyond school.
Imperative of the verb faire: why the -s is mandatory
In the present imperative, the verb faire is conjugated in three persons: fais (2nd person singular), faisons (1st person plural), faites (2nd person plural). The form “fais” always carries a final -s, like the vast majority of verbs in the second group and irregular verbs at this point in the conjugation.
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When the pronoun “moi” follows the imperative, we connect the two with a hyphen: fais-moi. This construction applies to all pronominal complements placed after an affirmative imperative (fais-le, fais-lui, fais-nous).
The confusion with “fait” comes from a reflex: in the present indicative, the third person is written “il fait”, and the past participle is also written “fait”. The brain associates the sound [fɛ] with this shorter spelling.
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To distinguish the cases, the useful question is simple: is it an order addressed to “tu”? If yes, it’s the imperative, therefore “fais”. The question fais-moi or fait-moi in spelling is systematically resolved this way.
Past participle “fait”: the cases where the -s disappears
The past participle of the verb faire is written “fait” in the masculine singular. This is the form found in compound tenses: “j’ai fait”, “tu as fait”, “elle a fait”. Here, there is no -s, regardless of the person.
Writing “j’ai fais” is always a mistake. The past participle does not change according to the subject in these constructions with the auxiliary avoir (except for agreement with a preceding COD, but the ending remains -t: “la tarte que j’ai faite”).
A report from the Scientific Council of National Education highlights that the most frequent errors among students concern precisely grammatical spelling: agreements, past participles, verb-subject links. The pair “fais / fait” falls into this category of structural difficulties.
How to distinguish imperative and past participle in a second
- Mentally replace “faire” with “prendre”: if you would say “prends-moi” (with an -s), then it is indeed “fais-moi” in the imperative.
- If the sentence contains an auxiliary (avoir or être), you are facing a compound tense: the past participle is written “fait”, without -s. Example: “tu m’as fait plaisir”.
- Test with “nous”: “fais-moi confiance” becomes “faisons-nous confiance” (imperative), while “il m’a fait confiance” becomes “il nous a fait confiance” (indicative past perfect).
Conjugation of faire in the present indicative and frequent confusions
In the present indicative, faire is conjugated as follows: je fais, tu fais, il/elle fait, nous faisons, vous faites, ils/elles font. The first two persons carry an -s, while the third does not. This asymmetry fuels the confusion.
The phrase “c’est moi qui fais” regularly poses a problem. The relative pronoun “qui” refers to “moi”, thus to the first person singular. The verb agrees with the antecedent of the relative pronoun, not with “qui” itself. Therefore, we write “c’est moi qui fais” and “c’est toi qui fais”, but “c’est lui qui fait”.
This rule extends to all persons: “c’est nous qui faisons”, “c’est vous qui faites”. The error “c’est moi qui fait” (agreement in the third person) arises from the fact that “moi” is a tonic form, perceived as external to the conjugation. The trap is real, but the rule has no exceptions in standard French.
Fait before an infinitive: the rule of invariability
When the past participle “fait” is immediately followed by an infinitive, it remains invariable. This rule, often unknown, simplifies many cases.
Examples: “elle s’est fait couper les cheveux” (and not “faite”), “les robes qu’elle a fait coudre” (and not “faites”). The participle “fait” does not agree because the grammatical subject does not directly perform the action of the infinitive.
This invariability before the infinitive distinguishes “fait” from most other past participles, which follow the classic agreement rules with the preceding COD. Remembering this exception helps avoid mistakes in everyday sentences, especially with constructions like “se faire + infinitive” (se faire opérer, se faire livrer, se faire aider).
Summary of forms to remember
- “Fais-moi”: imperative, order or request addressed to “tu”. Always with an -s.
- “Il me fait”: present indicative, third person. Without -s.
- “J’ai fait”: past perfect, past participle. Never “j’ai fais”.
- “Elle s’est fait remarquer”: past participle followed by an infinitive, invariable.
- “La tarte qu’il a faite”: past participle without infinitive, agreement with the preceding COD.
Research in spelling didactics shows that we make more progress by working on families of cases (all verbs in the past perfect with avoir, including faire) rather than dealing with isolated pairs. Learning that the past participle of faire is always “fait” instantly resolves “j’ai fait”, “tu as fait”, “nous avons fait”, without having to memorize each combination.
The next time doubt arises in front of a screen or a blank sheet, the substitution method with “prendre” cuts through in less than two seconds. And if the sentence contains an auxiliary, the -s simply has nothing to do there.