How do you say is my in French?

There isn't a direct equivalent of "is my" in French, as it's usually implied by context. Here's how you would typically express it:

* "Est-ce que c'est mon...?" (Is this my...?) - This is the most common way to express "is my" in a question.

* "C'est mon..." (This is my...) - You can use this for a simple statement.

* "Le mien..." (Mine...) - This is used to refer to something already mentioned, similar to "my" in English.

Here are some examples:

* Is this my book?

* Est-ce que c'est mon livre?

* This is my car.

* C'est ma voiture.

* I lost my keys.

* J'ai perdu mes clés. (Here, "mes" implies "my" referring to the keys already mentioned)

Remember, the specific way you express "is my" in French will depend on the context and the sentence structure.