HomeGrammarUses of Must and Can’tUses of Must and Can’t admin 3 August 2015 Grammar No Comments Uses of Must and Can’t;You can use must to say that you believe something is certain.You can use can’t to say that you believe something is not possible. Tweet Pin It Related Posts Confused Words – We’re, Were, Where Alphabetical List of Contractions Gerunds in EnglishAbout The Author admin