1. To: This is the most common translation of "au" when it is used as a preposition meaning "to" or "at."
* Example: "J'ai été au cinéma" translates to "I went to the cinema."
2. The: This is the translation of "au" when it is used as a contracted form of "à le" meaning "to the" or "at the."
* Example: "Le livre est au bureau" translates to "The book is on the desk."
3. Gold: This is the English translation of "au" when it refers to the chemical element gold.
* Example: "The ring is made of 18 karat au."
4. To the: Sometimes, "au" is left untranslated and is simply understood as "to the" in the context of the sentence.
* Example: "Il va au marché" translates to "He is going to the market."
To determine the correct translation, you need to consider the context of the sentence and the usage of "au."