example (negative sentence)
structure: used to (interrogative)
example (interrogative sentence)
When using the expression used to ?
Structure: Used to (affirmative)
structure: used to (negative)
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+ subect + use to + V(infinitive)+ Complement?
Subject.+ used to + V(infinitive)+ Complement.
Did you use to eat sushi in Japan? Yes, I used to / No I didn't use to
Subject.+ didn't + use to + V(infinitive)+ Complement.