modal verbs: obligation, prohibition, necessity, ability, permission and advice

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What are modal verbs?

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Modal verbs are auxiliary verbs that express necessity, ability, permission, or possibility. Examples include can, could, may, might, must, shall, should, will, and would.

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What does 'can' express?

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'Can' is used to express ability or possibility.

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What does 'must' indicate?

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'Must' indicates obligation or necessity.

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What does 'mustn't' mean?

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'Mustn't' indicates prohibition or something that is not allowed.

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What does 'don't have to' imply?

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'Don't have to' implies that there is no obligation to do something.

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What is the difference between 'must' and 'have to'?

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'Must' and 'have to' are often used interchangeably to express obligation, but 'must' is more personal and subjective, while 'have to' is more objective.

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What does 'may' express?

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'May' is used to express permission or possibility.

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What does 'should' indicate?

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'Should' is used to give advice or recommendations.

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How is 'can' used in a sentence?

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Example: 'She can swim very well.' (indicating ability).

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How is 'mustn't' used in a sentence?

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Example: 'You mustn't smoke in here.' (indicating prohibition).