Must ( modal verb , noun )

(As a modal verb)

Must ( modal verb )

1. Used to indicate that something is mandatory or necessary.
2. Used to indicate a strong recommendation or suggestion.
3. Used to indicate that it is certain or highly likely that something is the case.
4. Used to indicate that a conclusion or inference can be drawn from available evidence.
5. Used to indicate that something is inevitable or destined to happen.

Origin:

From middle english moste, mosten, from old english mōste, mōston, past tense of mōtan (“to be able to, to have to”).

Examples:

1. You must wear a seatbelt while driving.
2. You must try the cake, it's delicious.
3. He must be exhausted after running a marathon.
4. With all the evidence we have, he must be the culprit.
5. If we don't act soon, a disaster must happen.

(As a noun)

Must ( noun )

1. Used to indicate that something is mandatory or necessary.
2. Used to indicate a strong recommendation or suggestion.
3. Used to indicate that it is certain or highly likely that something is the case.
4. Used to indicate that a conclusion or inference can be drawn from available evidence.
5. Used to indicate that something is inevitable or destined to happen.

Origin:

From middle english moste, mosten, from old english mōste, mōston, past tense of mōtan (“to be able to, to have to”).

Examples:

1. You must wear a seatbelt while driving.
2. You must try the cake, it's delicious.
3. He must be exhausted after running a marathon.
4. With all the evidence we have, he must be the culprit.
5. If we don't act soon, a disaster must happen.