Relacionar Columnas Modal verbs of obligation Versión en línea Match the modal verb of obligation with the correct description of each one. por AE Nallely 1 Shouldn't 2 Should 3 Don't have to 4 Negative structure 5 Must 6 Mustn't 7 Have to 8 Positive structure Talks about rules and regulations. The obligation does not come from the person who is speaking. MILD negative obligation or advice. Expresses that something is a BAD idea. Expresses that something is ESSENTIAL or MANDATORY from the SPEAKER'S point of view. It is an internal, subjective and strong OBLIGATION that the speaker HIMSELF imposes. Expresses a STRONG obligation that comes from a LAW or REGULATION. Means you DON'T need to do something, but it's FINE if you want to do it. Is a weak obligation, and we use it to give advice. Modal verb + infinitive form of the action verb Means it's not ALLOWED. Express PROHIBITION. Means something is FORBIDDEN. Modal verb in negative form (shouldn't / mustn't / don't have to) + infinitive form of the action verb