- Used to expresses past habits or situtions that are different now.
For example:
Sandra used to live in Mexico City.
She used to wear jeans.
We used to eat hamburgers.
Affirmative:
- Subject + used to + verb + complement
Sophie used to cook in the restaurant.
Negative:
- Subject + didn't + use to + verb + complement
Natasha didn't use to study hard.
Question:
- (Wh) + did + subject + use to + the base form of the verb
Did you use to play the piano?
conclusion: In this area we will also learn the "used to" when positive or "use to" when is negative and so the question of how to use the "used to" to see what different situation we are now.

Excellent, but also not forget, that when use "used to" the verb always go in base form, and the "didn't" also can go in whatever pronoun
ResponderEliminarIs interesting that, The verb "use" means "use" or "used". However, when we use this verb in the past tense, more the preposition "to" as modal verb, the meaning changes.
ResponderEliminarThe modal verb "used to" is used to indicate something that happened in the past. This grammar rule is useful