Student or Learner
What is the question for THERE USED TO BE?
tHERE MUST TO BE
THERE HAS TO BE
Thank you loads
Here's one example.
Sam: Where is (there) a DVD store?
Pat: Well, there used to be one on this corner, but it's no longer here. They must have moved.
Sam. There has to be another one nearby. Let's ask someone.
There must to be <ungrammatical>