`1)` My father started smoking last year .

`->` My father didn't use to smoke before last year . 

`2)` My sister stopped playing badminton after she had a traffic accident .

`->` My sister used to play badminton before she had a traffic accident .

`3)` They started to go to the fitness center after they gaining weight .

`->` They didn't use to go to fitness center before gaining weight .

`4)` When I was young , I believed in magic .

`->` I used to believe in magic when I was young .

`5)` Did you walk to school when you lived lived with your grandparents ?

`->` Did you use to walk to school when you lived with your grandparents ?

`6)` She was very nervous before every geography exam .

`->` She used to be very nervous before every geography exam .

`7)` When he was a little boy , he dreamed of being a superman .

`->` When he was a boy, he used to be dream of being a superman .

`8)` She is not able to dance well as she did in the past .

`->` In the past she used to dance better than she does now .

`9)` Did you go to the English for Kids Club when you were at primary school ?

`->` Did you use to go to the English for Kids Club when you were at primary school ? 

`10)` My sister did not have long hair when she was a teeenager .

`->` My sister didn't use to have long hair when she was a teeenager .

1. My father didn't use to smoke before last year

2. She used to play badminton before she had a traffic accident

3. They didn't use to go to fitness center before gaining weight

4. I used to believe in magic when I was young

5. Did you use to walk to school when you lived with your grandparents?

6. She used to be very nervous before every geography exam

7. When he was a boy, he used to be dream of being a superman

8. In the past she used to dance better than she does now

9. Did you use to go to the .... primary school?

10. My sister didn't use to have long hair when she was a teeenager