Expression "used to be"

[Papatyae]

Please, I need more info about "used to be" expression, could someone write few sentences as examples with "used to be"
thank U

[Kasia*]

We use "used to be' to say that something was true but no longer is.

There used to be a cinema in the town but now there isn't.
Sarah used to be fat, but now she is thin.
George used to be the best student in class, but now Lena is the best.