We use 'must' + base form to express ____ in the present / future. We use 'have to' + base form to express ____ in the present / future. We use ____ + base form to express necessity in the present or future. We use mustn't' and ____ + base form to express prohibition.____ We use 'don't have to' / 'don't need to' / ____ + base form to express lack of obligation / necessity. ____ and ____ + base form refers to the present or future and is used to ask / give advice; to express an opinion, to make a suggestion and to express mild obligation. We use should + ____ + ____ to express regret about something that didn't happen in the past and vica versa. We use 'had better' + base form to give strong advice. It often expresses ____ and ____ We use ____ , ____ and ____ + base form to express possibility in the present or future. We use 'may not' / 'might not' + base form to express improbability in the ____ or ____ We use 'may' / 'might' + ____ + ____ to express possibility in the past. We use ____ + 'have' + ____ to express that something was possible in the past but didn't eventually happen. We use ____ + base form to express a positive deduction about the present or future. We use ____ + base form to express a negative deduction.

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