When I was a child, I used to cycle to school yesterday.
When I was a child, I used to cycle to school.
My brother always used listen to heavy metal music.
My brother always used TO listen to heavy metal music.
We didn’t used to have any pets.
We didn’t use to have any pets.
I use to stay up all night dancing. Now I get tired at 10 pm.
I used to stay up all night dancing. Now I get tired at 10 pm.
We used to go skiing in the holidays last year.
We used to go skiing in the holidays.
My family used to live in a different city.
correct