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Must, need to, and have to are similar modal forms in English. Learn the differences and when to use each, and then test your knowledge.
A Story to Practice the Modal Verbs May and Might – Really
have to must –
5 Home Page Must Haves For Your Website, must have
When should we use 'must' instead of 'have to'?
Auxiliary Verb 'Must' used to indicate a strong intention or
What Are Modal Verbs? 📖 Learn English in California
Using Should in English - Video - Oxford Online English
Lecture Modals, PDF, Verb
Must, have to, should
have to, must, should – obligation, prohibition, necessity, advice