Question

Exercise
1 - Put in the negative and interrogative form (ponha na forma negativa e
interrogativa).
a) He used to play guitar.
b) Margareth used to prefer reading a book than playing.
c) She used to live in a big city.​

Answer 1

-a) he doesn’t play guitar
-a) does he play guitar?
-b) Margaret don’t prefer reading a book than playing
-b) Do Margaret prefer a book than playing?
-c) she doesn’t live in a big city
-c) does she lives in a big city?

Answer 2

1. A) negativa = he doesn't play guitar

interrogativa = does he play guitar?

b) negativa = Margaret didn't used to prefer reading a book than playing.

interrogativa = did Margaret use to prefer reading a book than playing?

c) negativa = she didn't used to live in a big city.

interrogativa = did she use to live in a big city?

Explicação:

forma interrogativa do used to = did + sujeito + use to + verbo principal + complemento

forma negativa do used to = sujeito + did not use to + verbo principal + complemento

forma positiva do used to = sujeito + used to + verbo principal + complemento

Espero ter ajudado!