Au vs À la in French: Why À le Becomes Au À plus le becomes au and à plus les becomes aux. À la and à l' stay separate. The form comes from the article attached to the noun, with a few important exceptions for cities, countries, and expressions without an article.

The two contractions to remember

French joins two preposition and article combinations:

• à + le = au: Je vais au cinéma.
• à + les = aux: Je vais aux États-Unis.

The other two common forms stay visible:

• à + la = à la: Je vais à la piscine.
• à + l' = à l': Je vais à l'école.

That is the whole core pattern. If you have a masculine singular noun with the definite article le, use au. If the noun is plural with les, use aux. A feminine singular noun keeps à la. Normally, a singular definite article elides to l' before a vowel sound or silent h, giving à l'.

Let the article do the work

A common shortcut is “places take au.” It works for a few familiar phrases, then breaks:

• au parc, because parc is masculine singular
• à la plage, because plage is feminine singular
• au marché, because marché is masculine singular
• à la gare, because gare is feminine singular
• à l'université, because the article elides before the vowel sound

The verb is unchanged. Je vais can introduce every form. The noun and its article determine what follows à.

This is also why memorising the full phrase is useful. Learn le cinéma, la piscine, l'université, and les États-Unis, rather than trying to guess a destination category in the middle of a sentence.

Where this rule does not apply

The contraction rule is narrow. It explains combinations with à and a definite article. It does not decide every French expression for a destination.

Cities normally have no article:

• Je vais à Paris.
• Elle habite à Lyon.

Country names use their own pattern:

• Je vais en France.
• Il travaille au Japon.
• Nous voyageons aux États-Unis.

Some activities also use no article or a different phrase:

• Je vais à pied.
• Nous sommes en vacances.
• Elle va chez le médecin.

Do not force au into these expressions. First ask whether the phrase actually contains à + le.

The vowel and h boundary

The normal rule before a vowel sound or a silent h is that le or la becomes l':

• à l'école
• à l'hôtel
• à l'aéroport
• à l'université

The apostrophe hides the gender. Hôtel is masculine and école is feminine, but both use à l' because of the sound at the beginning.

French also has words with an aspirated h. You do not hear the h. It still blocks elision. A few other vowel-initial forms block it too, including le onze, and some words begin with a consonantal glide rather than a vowel sound. Keep exceptional words with their article as vocabulary instead of trying to predict everything from the first written letter. For example, le héros keeps le, while l'hôtel uses l'.

De has two contractions too

With the definite article, only two de combinations contract:

In that table, du and des are contractions. De la and de l' are the preposition followed by an article, still written separately.

The same spellings can do other jobs. In je bois du café and je bois de la bière, du and de la are partitive articles meaning “some.” In j'ai des amis, des is the plural indefinite article. Those forms do not prove that a hidden de + article contraction occurred. Read the whole phrase.

A real aux miss

On 18 August, a prompt put à les collègues in front of me. I answered, “hmm not sure.” The correction was simply aux. That is the actual problem for me. The table is small, but the contraction still has to arrive while I am making the sentence.

I am learning French because my wife is French, and I want to speak properly with her and her family. I have set myself a goal of reaching roughly B2 by the end of 2026. It is my own target.

I put that exact à les collègues miss into Coucou, the early Telegram tutor I built for my practice, so aux can come back in a later prompt. One replay does not make the contraction automatic. I still have to answer it again without the table.

Try it without a table

Use one frame:

Now make the choice from the noun, not from a translation of to:

Cover the phrases. Look only at the nouns and say the complete sentence. Then change the subject or time:

• Demain, je vais au marché.
• Elle va à la gare.
• Nous allons à l'hôtel.
• Ils vont aux États-Unis.

Do the same with de:

• Je reviens du marché.
• Je viens de la gare.
• Je sors de l'hôtel.
• Je parle des vacances.

If you hesitate, write the noun with its article once. Then hide the article and try again. A separate list of places that “take au” will not tell you why à la gare behaves differently.

This choice is small enough to practise in a minute. The speaking-alone guide has longer routines when getting any sentence out is the harder part. For another common form that depends on the words around it, the c'est vs il est guide starts with what comes next.

One last trap is worth leaving unresolved until you inspect the phrase. Je reviens du marché contains the definite contraction de + le. Je bois du café uses a partitive article. Same spelling, different job.

Last updated: 1 September 2026. This is a personal account from someone still learning, not expert linguistic advice. French examples reflect standard usage.

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