"Did you study the French lesson?"
Here's a breakdown:
* Est-ce que is a common way to ask questions in French. It is similar to "Do you..." or "Did you..." in English.
* tu is the informal "you" (singular).
* as is the past participle of the verb "avoir" (to have), which is used in the perfect tense to indicate a completed action.
* étudié is the past participle of the verb "étudier" (to study).
* le cours is the "lesson".
* du Français is a prepositional phrase meaning "of French".
Therefore, the sentence asks if the person being spoken to has completed the French lesson.