1) We use CAN to express a) ability b) advice c) obligation 2) We use MUST to express a) ability b) obligation c) advice 3) We use SHOULD to express: a) ability b) advice c) obligation 4) We use CAN'T to express: a) lack of ability b) advice c) prohibition 5) We use MUSTN'T to express: a) advice b) prohibition c) lack of ability 6) We use SHOULDN'T to express: a) advice b) lack of ability c) prohibition

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