Yes, I have./No, I haven't.
2. your parents/ever/travel to Greece?
Have your parents ever traveled to Greece?
3. you/ever/ride a scooter?
Have you ever ridden a scooter?
4. your teacher/ever/see a ghost?
Has your teacher ever seen a ghost?
5. you/ever/be on a double-decker bus?
Have you ever been on a double-decker bus?
6. your friends/ever/spend a night in a castle?
Have your friends ever spent a night in a castle?