Question

What is the passive voice of this sentence, " Did you prepare your breakfast​

Answer 1

Answer:

Was your breakfast prepared by you

Answer 2

Answer:

However, the sentence as it is is incomplete. The present simple indicates a habit; do you mean to say that the people in question are in the habit of eating breakfast? If not you either need to get more specific win the habit, eg “they have their breakfast at the same time every day.” If you mean to say that the meal is taking place right now you need to say “they are having their breakfast.”