Yes / No Questions are used for confirming information that you already have.
Have you ever seen an accident?
Has Ernest gotten flu recently?
Have the teachers from high school prepared their classes?
Has the principal gone to Europe before?
Have the janitors cleaned this classroom these days?
Have you done activities from this unit?
Has Janeth got excellent grades last semester?
Has Cirilo won a prize before?
Find a person who has done this activities. Ask the question: Have you ever….? Yes, I have / No I haven’t And the person who answers yes, write his/her name on the line. You can not repeat the names.