Grammar
Un, une, des: how French says a, an, and some.
Bonjour ! Now that we have covered the definite articles (*le*, *la*, *les*), it is time to look at their equally important cousins: the indefinite articles. If *le* and *la* point to specific things, *un*, *une*, and *des* are your essential tools for introducing something entirely new to a conversation.
Un and une
Just like with all French words, gender dictates your choice. You will use un for masculine nouns and une for feminine nouns. They translate to "a" or "an" (and also the number "one").
« un café » (a coffee - masculine)
« un billet » (a ticket - masculine)
« une table » (a table - feminine)
« une idée » (an idea - feminine)
Des means "some" or "plural a"
This is where English speakers often hesitate. In English, we simply drop the word "a" when a noun becomes plural (e.g., "I have a book" becomes "I have books"). In French, a noun can almost never stand alone! We use des as the plural of un and une. It roughly translates to "some," but it is often used where English uses no word at all.
« J'ai des amis à Lyon. » (I have friends in Lyon. / I have *some* friends in Lyon.)
« Il y a des livres sur la table. » (There are books on the table.)
Use un, une, des to introduce
As a rule of thumb, use these articles when the object is not already known in the conversation, or when any version of the item will do.
« Je cherche un restaurant. » (I am looking for a restaurant - any restaurant, not a specific one.)
Switch to le, la, les when specific
Here is a wonderful trick to sound highly organized in French: start with the indefinite article when you first mention something, and switch to the definite article once it becomes a known topic.
First mention: « Je vois une boulangerie. » (I see a bakery.)
Later: « La boulangerie est fermée. » (The bakery is closed.)
This switch is a small detail, but mastering it will make your French sound incredibly clear and beautifully structured. Très bien ! (Very good!)