1) What is the meaning of the modal must/has to in the sentence he must/has to be at work by 10 o clock ? 2) What

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Modal verbs are an important part of the English language as they help us express various degrees of possibility, necessity, obligation, advice, and ability. Let"s explore the meanings of each modal verb in the given sentences:

1) The modal verb "must" or "has to" in the sentence "he must/has to be at work by 10 o"clock" expresses a strong obligation or necessity. It implies that it is required for him to be at work by the specified time. This indicates that there is a rule or some kind of external pressure that compels him to be present at work at 10 o"clock.

2) The modal verb "mustn"t" in the sentence "you mustn"t park your car on this street" indicates prohibition or necessity to avoid doing something. In this case, it means that it is not allowed to park the car on that particular street. There is a rule or restriction in place, and it is important to comply with it.

3) The modals "don"t have to" and "don"t need to" in the sentence "you don"t have to/don"t need to meet them if you don"t want to" show lack of obligation or necessity. They imply that meeting those people is optional and not required. It gives the freedom of choice, suggesting that it is not necessary to meet them if the person does not wish to.

4) The modals "should" or "ought to" in the sentence "you should/ought to have visited the ancient city before you left" express a recommendation or advice. It suggests that it would have been a good idea or the right thing to do to visit the ancient city before leaving. It implies a sense of expectation or opinion that it was desirable or beneficial to have the experience of visiting the city.

5) The modal verb "can" in the sentence "she can speak five languages" expresses ability or capability. It indicates that she possesses the skill or capacity to speak five languages. It suggests that she has the knowledge and proficiency to communicate effectively in those languages.

In conclusion, modal verbs play a significant role in expressing different meanings and functions in English sentences. Understanding their meanings helps in conveying various nuances of necessity, prohibition, advice, ability, and more.