The singular indefinite articles in French correspond to a, an, or one in English. The plural corresponds to some. There are three forms of the French indefinite article.
Singular
Masculine = un
Un garcon= a boy
Un ami = a friend
Feminine = une
Une fille= a girl
Une amie= a friend
Plural :
Des garçons = some boys
Des filles = some girls
Note that the plural indefinite article is the same for masculine and feminine nouns, whereas the singular has a different form for masculine and feminine.
Meaning and usage of the French indefinite article
The indefinite article usually refers to an unspecified person or thing
.
J'ai trouvé un livre - I found a book.
Il veut une pomme - He wants an apple.
The indefinite article can also refer to just one of something:
Il y a un étudiant dans la salle - There is one student in the room.
The plural indefinite article means some
:
J'ai acheté des haricots verts - I bought some green beans.
Veux-tu des livres ? - Do you want some books?
When referring to a person's profession or religion, the indefinite is not used in French, although it is used in English. I know, I know, the exceptions never end
.
Je suis professeur - I am a teacher.
Il va être médecin - He's going to be a doctor.
In a negative construction, the indefinite article changes to de, meaning any:
J'ai une pomme ==> Je n'ai pas de pommes.
I have an apple ==> I don't have any apples.

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