The Difference Between Must, Have to, Shall, Need and May

In English there are various ways to describe rules and obligations. Here is a description of how to express obligation and how and when to use modal verbs.

How to Use Must, Have to, and Need to in English, must have

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Quali sono le differenze tra 'must' e 'have to' in inglese? - Quora

Quali sono le differenze tra 'must' e 'have to' in inglese? - Quora

The Difference Between Must, Have to, Shall, Need and May

Possessive Adjectives and Pronouns

How to Use Must, Have to, and Need to in English, must have