sure + of + noun/pronoun
Are you sure of the results?

sure + about + noun/pronoun
Are you sure about that?

sure + clause
Are you sure he will agree?

sure + that + clause
Are you sure that he will agree?

sure + to + base form
The movie is sure to make you laugh.

sure + of + -ing form
They must win to be sure of qualifying for the next round.

sure + if + clause
I’m not sure if this has been done before.