Question

Complete the sentence with "used to" or "use to"

Did you ___ have Instagram?

a) used to
b) use to

Answer 1

use to

Step-by-step explanation:

The auxiliary verb (did) is marked for past tense, but the main verb (use) is not cuz it's supposed to appear in it's base form

Answer 2

b) use to

Step-by-step explanation:

This is because at the beginning of the sentence there is already a past tense "did" so the verb after that would have to be in base form which would be "use to". It's a rule so I can't really explain much.