_____(She/not talk) in rhyme, but now she does it all the time.
She didn’t use to talk in rhyme, but now she does it all the time.
_____( she/think) the moon followed her home?
Did she use to think the moon followed her home?
_____( I/believe) 'nachos' were a health food. I still do.
I used to believe 'nachos' were a health food. I still do.