From Longman Dictionary of Contemporary Englishbe sure of (doing) somethingbe sure of (doing) somethingCERTAINLY/DEFINITELYto be certain to get something or be certain that something will happen United must beat Liverpool to be sure of winning the championship. You can be sure of one thing – there’ll be a lot of laughs. → sure
Examples from the Corpus
can be sure of• By eating a variety of different foods we can be sure of getting sufficient vitamins and minerals.• Whatever else she may do or be, she can be sure of her essential female nature.• What we can be sure of is that Tangshan rates as no more than third in the cataclysmic league.• Call, or ask your agent to call, and you can be sure of service second to none.• New York and Detroit will come up with an attractive separation package, you can be sure of that.• Other groups of plants require a thorough revision before we can be sure of the proper name for the species.• The past has gone and no one can be sure of what is to come in the future.• One of the advantages of this source is that users can be sure of what they are getting. 