Rephrase the question: 1) What is the meaning of the modal verbs must and has to in the sentence He must/has to

1) Modal verbs are used to express various degrees of obligation or necessity. In the given sentence, the modal verbs "must" and "has to" convey a strong obligation for the person mentioned to be at work by 10 o"clock. Both of these modal verbs suggest that it is necessary to be at work at the specified time. Additionally, "must" implies that the speaker is imposing a personal or internal obligation, while "has to" indicates an external obligation imposed by someone else or by a set of rules.

2) The modal verb "mustn"t" in the sentence "You mustn"t park your car on this street" expresses a prohibition or a strong obligation to refrain from doing something. Specifically, it indicates that it is not allowed or it is forbidden to park the car on the mentioned street. The use of "mustn"t" emphasizes the importance of following the rule or restriction.

3) The modal verbs "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" indicate that meeting the mentioned individuals is optional or not necessary. They suggest that there is no obligation or requirement to meet them if the person in question does not desire to do so. Both modal verbs convey the idea of freedom of choice or lack of compulsion.

4) In the sentence "You should/ought to have visited the ancient city before you left," the modal verbs "should" and "ought to" express a recommendation or advice. They suggest that it would have been a good or advisable course of action for the person to visit the ancient city before leaving. These modal verbs imply a sense of duty or moral obligation based on what is considered the right or appropriate thing to do.

5) The sentence ends before continuing the question, so I am unable to see the full question. Could you please complete the question so I can provide you with a detailed and thorough answer regarding the meaning of the modal verbs mentioned?