Modals of obligation and necessity

Front

What is a modal verb?

Back

A modal verb is a type of auxiliary verb that expresses necessity, possibility, permission, or ability. Examples include 'must', 'have to', 'should', and 'can'.

Front

What does 'have to' indicate?

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'Have to' indicates a strong obligation or necessity to do something. For example, 'I have to finish my homework.'

Front

What does 'don't have to' mean?

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'Don't have to' indicates that there is no obligation or necessity to do something. For example, 'You don't have to come to the meeting if you are busy.'

Front

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

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'Must' is often used for personal obligations or strong recommendations, while 'have to' is used for external obligations imposed by rules or circumstances.

Front

What does 'mustn't' indicate?

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'Mustn't' indicates a prohibition or something that is not allowed. For example, 'You mustn't smoke in the hospital.'

Front

When do we use 'had to'?

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'Had to' is the past tense of 'have to' and is used to express an obligation that existed in the past. For example, 'I had to study for the exam last night.'

Front

What does 'should' imply?

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'Should' implies a recommendation or advice, suggesting that something is a good idea. For example, 'You should eat more vegetables.'

Front

What is the meaning of 'it is not mandatory'?

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'It is not mandatory' means that something is not required or compulsory. For example, 'It is not mandatory to wear a uniform at this school.'

Front

How do we express a lack of necessity in the past?

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We express a lack of necessity in the past using 'didn't have to'. For example, 'I didn't have to go to work yesterday because it was a holiday.'

Front

What is an example of a rule using 'have to'?

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An example of a rule using 'have to' is: 'Students have to submit their assignments by Friday.'