Relier Pairs Must have toVersion en ligne The correct use of must , have to and their negative form par Sabs Negrete 1 Forbidden or not allowed to do 2 Not necessary and you can choose 3 You have no choice. 4 A personal very important, necessary thing to do 5 It is an obligation from the situation. 6 It isn't necessary, just and advice 7 Formal or written obligations MUST HAVE TO MUST DON'T HAVE TO MUST NOT SHOULD & SHOULDN'T HAVE TO