Affirmative: I used to go to work by car.
Negative: I didn't use to go to work by car.
Interrogative: Did I use to go to work by car?
Affirmative: You used to have many friends at school.
Negative: You didn't use to have many friends at school.
Interrogative: Did you use to have many friends at school.
Affirmative: He used to visit her grandparents at the weekends.
Negative: He didn't use to visit her grandparents at the weekends.
Interrogative: Did he use to visit her grandparents at the weekends?
Affirmative: She used to be my best friend.
Negative: She didn't use to be my best friend.
Interrogative: Did she use to be my best friend?
Affirmative: It used to be a cinema earlier.
Negative: It didn't use to be a cinema earlier.
Interrogative: Did it use to be a cinema earlier?
Affirmative: We used to have dinner at six every evening.
Negative: We didn't use to have dinner at six every evening.
Interrogative: Did we use to have dinner at six every evening?
