Matching Pairs Modal verbs of obligation Online version Match the modal verb of obligation with the correct description of each one. by AE Nallely 1 Should 2 Negative structure 3 Don't have to 4 Have to 5 Positive structure 6 Mustn't 7 Shouldn't 8 Must MILD negative obligation or advice. Expresses that something is a BAD idea. Modal verb in negative form (shouldn't / mustn't / don't have to) + infinitive form of the action verb Means you DON'T need to do something, but it's FINE if you want to do it. Means it's not ALLOWED. Express PROHIBITION. Means something is FORBIDDEN. 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. Modal verb + infinitive form of the action verb Talks about rules and regulations. The obligation does not come from the person who is speaking. Is a weak obligation, and we use it to give advice.
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