* Before "e", "i", or "y": "ch" is pronounced like the English "sh" sound. For example: "chat" (pronounced "shah"), "chien" (pronounced "shee-an")
* Before other vowels or consonants: "ch" is pronounced like the English "k" sound. For example: "chasse" (pronounced "kass"), "char" (pronounced "kar")
Exceptions:
* "Ch" in some words of Greek origin is pronounced "k": For example, "chlorophylle" (pronounced "klorofil").
* "Ch" at the end of a word is often silent: For example, "chouchou" (pronounced "shoo-shoo").
It's important to remember that there are always exceptions to the rules, so it's always a good idea to check the pronunciation of a word if you're unsure.