They were having a party when the doorbell rang. Peter opened the door and an angry policeman entered the room. Mary and George were dancing while music was playing loud. Bob and Ben were drinking Coke while Kristi was eating sandwiches. Ted and Steve were singing. Alex was cleaning while the dog was barking. James was sleeping on the sofa while Sheila was trying to wake him up. Edward and Lucy were laughing. Susan was bringing coffee. Chris was leaving the party while Paula was crying because she didn't want him to leave.
Used to is used to talk about past habits. It has the same form in all persons, singular and plural. It forms its negative and interrogative form with did.
I used to cry when I was a baby. I didn't use to sleep late. Did you use to sleep late?
Ответ: See above.