Correct: We use "should" for advice. , We use "have to" for external obligations., We use "should" for suggestions., We use "mustn't" for prohibition. , We use "not have to" for lack of necessity., We use "can" for ability and permission. , We use "shouldn't" for negative advice, We use "must" for internal obligation, We use may for polite requests, We use needn´t for lack of necessity, We use will for prediction, We use shall to offer help, We use can´t for negative supposition, We use will for spontaneous self-offer, Incorrect: We use "should" for obligations., We use "should" for possibility., We use "can" for advice., We use "shouldn't" for prohibition., We use "not have to" for necessity., We use "shouldn't" for prohibition, We use "not have to" for rules, We use mustn´t for negative supposition, We use might for high possibility, We use a past tense after a modal,

MODAL VERBS B2

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