How do you say did eat breakfast in French?

There are a few ways to say "did eat breakfast" in French, depending on the context and formality:

Informal:

* J'ai déjeuné. (I ate breakfast)

* Tu as déjeuné ? (Did you eat breakfast?)

Formal:

* Avez-vous déjeuné ? (Did you eat breakfast?)

To emphasize the action of eating:

* J'ai mangé mon petit déjeuner. (I ate my breakfast)

* Tu as mangé ton petit déjeuner ? (Did you eat your breakfast?)

For a more specific time:

* J'ai déjeuné ce matin. (I ate breakfast this morning)

* Avez-vous déjeuné avant de partir ? (Did you eat breakfast before leaving?)

Important Note: In French, the verb "déjeuner" is usually used for both lunch and breakfast.

For clarity, you can use "petit déjeuner" (small breakfast) for breakfast.