The meaning of MUST is be commanded or requested to. How to use must in a sentence.

We usually use must to talk about obligations which come from the speaker and we generally use have (got) to when we refer to obligations that come from outside the speaker. …

To be obliged or required by morality, law, or custom: Citizens must register in order to vote. 2. To be compelled, as by a physical necessity or requirement: Plants must have oxygen in order to live. 3. …

Must is a modal verb. It is followed by the base form of a verb. You use must to indicate that you think it is very important or necessary for something to happen. You use must not or mustn't to indicate that …

A must is something that's so important it can't be missed or ignored. When you're taking kayaking lessons, a lifejacket is a must.

(used to express that logically there is a need for the action or state of the next verb to be true): There must be some mistake (= there cannot be any other explanation possible). She must have had a …

“Must” is always followed by a base verb (the infinitive form of the verb without “to”) regardless of the subject in the sentence. Unlike some other verbs, “Must” doesn’t change according to tense or the …

Aug 12, 2025 · Have to is a more informal while Must is mostly used in written orders or instructions. Also, Must expresses obligation imposed by the speaker while Have to expresses external obligation.

(modal)Must is usually used to tell someone they have no choice about doing something because it is important or because of a rule or law. She must get her medicine soon or she will die.

MUST definition: to be obliged or bound to by an imperative requirement. See examples of must used in a sentence.