What this is
In English, when you want to talk about a thing rather than the thing, you use “a”, “an”, or “some”. In French, these are called indefinite articles. Just like the definite articles (le, la, les), they change depending on whether the noun they introduce is masculine or feminine, and singular or plural.
You use the indefinite article when you are introducing a new piece of information or talking about something non-specific. If you say “a cat”, it could be any cat. If you say “the cat”, you have a specific cat in mind.
The rule
French has three indefinite articles:
| Article | When to use it | Example |
|---|---|---|
| un | Masculine singular | un chat (a cat) |
| une | Feminine singular | une pomme (an apple) |
| des | Plural (all genders) | des chiens (some dogs) |
The word des is the plural of both un and une. It translates most closely to “some” in English, though English speakers often just leave it out entirely (“I see dogs”). In French, you cannot leave it out. A noun almost always needs an article.
Why it works this way
French is a language that relies heavily on articles to tell you the gender and number of a noun, because the nouns themselves often sound exactly the same in singular and plural. When you say chien and chiens, they sound identical. It is the article—un chien vs. des chiens—that lets the listener know how many dogs you are talking about.
Edge cases
After a negation, un / une / des collapse to “de”
When you negate a verb (using ne … pas), the indefinite articles un, une, and des all collapse into the word de (meaning “of”). Think of it this way: when you have none of something, its gender and plural-ness stop mattering. You don’t have “not a dog”, you have “not any of dog”.
- J’ai un chien. (I have a dog.)
- Je n’ai pas de chien. (I don’t have a dog.)
But not after “être”
The collapse to de only happens for direct objects—things you are having, seeing, or eating. It does not happen after the verb être (to be). When you are describing what something is, the article stays.
- C’est un chien. (It is a dog.)
- Ce n’est pas un chien. (It is not a dog.)
“Des” becomes “de” before a preposed adjective
Usually, adjectives in French come after the noun. But a few common adjectives, like grand (big), come before the noun. When a plural noun has an adjective placed before it, des shrinks to de.
- Des arbres (Some trees)
- De grands arbres (Some big trees)
Professions drop the article after “être”
In English, you say “I am a doctor” or “She is an actress”. You use the indefinite article. In French, when you state someone’s profession using être, you treat the profession almost like an adjective. You drop the article entirely.
- Il est médecin. (He is a doctor.)
- Je suis acteur. (I am an actor.)
What English speakers get wrong here
- Forgetting “des”. English often uses bare plural nouns (“I eat apples”). French almost never does. You must say Je mange des pommes (I eat some apples).
- Missing the negative collapse. English speakers constantly say Je n’ai pas un stylo. This is wrong. It must be Je n’ai pas de stylo.
- Using articles for professions. Saying Je suis un avocat sounds like “I am a lawyer” to English ears, but to French ears, it emphasizes the noun in a weird way, almost like “I am a person who is a lawyer”. Just say Je suis avocat.