Question

My grandfather _________ to parties when he was young. *

didn't used to go
didn't use to went
didn't use to go
didn't used to going
2. What _______ wear at elementary school, a uniform or regular clothes? *

did you used to
did you use to
you used to
did you use
3. Did your mom _______ at the farmers' market? *

use to buy
used to buy
used to bought
use to bought
​

Answer 1

1. didn't use to go

2. did you use to

3. use to buy