Matching Pairs Used to Online version Matching the questions with their answers by Fernanda Maza 1 When using the expression used to ? 2 structure: used to (interrogative) 3 example (negative sentence) 4 example (interrogative sentence) 5 structure: used to (negative) 6 Structure: Used to (affirmative) We use this expression to indicate something that occurred or happened in the past in a habitual way and nowadays it no longer happens. Subject.+ didn't + use to + V(infinitive)+ Complement. Subject.+ used to + V(infinitive)+ Complement. Did+ subect + use to + V(infinitive)+ Complement? Food didn’t use to be so expensive. Did you use to eat sushi in Japan? Yes, I used to / No I didn't use to