1 Did you have to buy a ticket?
Yes, I did.
2 Did you buy the ticket?
Yes, I did.
3 Does he have to buy a ticket?
Yes, he does.
4 Will he buy a ticket?
Yes, he will.
5 Is there a ticket there?
Yes, there is.
6 Is it a ticket?
Yes, it is.
7 Did it take him five minutes to buy a ticket?
Yes, it did.
8 Does he buy tickets there?
Yes, he does.