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

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

MUST meaning: 1. used to show that it is necessary or very important that something happens in the present or…. Learn more.

Must vs. Have to Must can be replaced by Have to with little difference in meaning: You have to study. (= you must study) He has to finish the report by Friday. (= He must finish the report by Friday) They have to resit the test. (= They must resit the test) Have to is a more informal while Must is mostly used in written orders or instructions.

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.

We use have to / must / should + infinitive to talk about obligation, things that are necessary to do, or to give advice about things that are a good idea to do.

Must definition: To be obliged or required by morality, law, or custom.

"Must" is a modal verb most commonly used to express certainty. It can also be used to express necessity or strong recommendation, although native speakers prefer the more flexible form "have to."

(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. (modal) If you say something must be true, you say you have come to believe that it is true. I must have left my phone at the restaurant. She must not have the note if you've got it.