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