Have to / must, to talk about obligation, or snth that is necesary to do, strong recommendations, Mustn't, smth is prohobited, you can use "can't" / "not allowed" instead of it, Should / shouldn't, to give advice or an opinion, you can use "ought to/ not ought to" instead of it, Must, specific or personal obligations, only exists in in the present, but it can be used with a future meaning, Have to, general, external obligations (rules/laws), exists in all tenses and forms, Don't have to, there is no obligation to do smth

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Modals should / shouldn't, must / mustn`t
Modals should / shouldn't, must / mustn`t
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Modals should, must, have to
Modals should, must, have to
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Modals of obligation: must, have to, should
Modals of obligation: must, have to, should
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Modals (have to / don't have to / should / shouldn't / must / mustn't
Modals (have to / don't have to / should / shouldn't / must / mustn't
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Must/mustn't, have to/don't have to, should/shouldn't
Must/mustn't, have to/don't have to, should/shouldn't
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Modals of obligation should/ have to/ must
Modals of obligation should/ have to/ must
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Modals - Must/Mustn't-Can't/ Have to - Don't have to/Can
Modals - Must/Mustn't-Can't/ Have to - Don't have to/Can
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Modals: must, should, have to, ought to
Modals: must, should, have to, ought to
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