must

ought; should; obliged, bound, required, or compelled to: You must be on time.; a necessity; vital: A warm coat is a must in this weather.
Not to be confused with:mussed – messy; untidy; tangled: mussed hair

must¹

M0499200 (mŭst)v.v.aux.1. 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. Used to express a command or admonition: You must not go there alone. You simply must be careful.4. To be determined to; have as a fixed resolve: If you must leave, do it quietly.5. a. Used to indicate inevitability or certainty: We all must die.b. Used to indicate logical probability or presumptive certainty: If the lights were on, they must have been at home.v.intr. Archaic To be required or obliged to go: "I must from hence" (Shakespeare).n. Something that is absolutely required or indispensable: Promptness on the job is a must. Comfortable boots are a must when going on a hike.

[Middle English moste, from Old English mōste, past tense of mōtan, to be allowed; see med- in Indo-European roots.]

must²

M0499200 (mŭst)n. The quality or condition of being stale or musty.

[Probably back-formation from musty.]

must³

M0499200 (mŭst)n. The unfermented or fermenting juice expressed from fruit, especially grapes.

[Middle English, from Old English, from Latin mustum, from neuter of mustus, new, fresh.]

must⁴

M0499200 (mŭst)n. Variant of musth.

must⁵

M0499200 (mŭst)n. Musk.

[Scottish, from Old French, variant of musc; see musk.]

must

(mʌst; unstressed məst; məs) vb1. used as an auxiliary to express obligation or compulsion: you must pay your dues. In this sense, must does not form a negative. If used with a negative infinitive it indicates obligatory prohibition2. used as an auxiliary to indicate necessity: I must go to the bank tomorrow. 3. used as an auxiliary to indicate the probable correctness of a statement: he must be there by now. 4. used as an auxiliary to indicate inevitability: all good things must come to an end. 5. (used as an auxiliary to express resolution)a. on the part of the speaker when used with I or we: I must finish this. b. on the part of another or others as imputed to them by the speaker, when used with you, he, she, they, etc: let him get drunk if he must. 6. (used emphatically) used as an auxiliary to express conviction or certainty on the part of the speaker: he must have reached the town by now, surely; you must be joking. 7. (foll by away) used with an implied verb of motion to express compelling haste: I must away. nan essential or necessary thing: strong shoes are a must for hill walking. [Old English mōste past tense of mōtan to be allowed, be obliged to; related to Old Saxon mōtan, Old High German muozan, German müssen]

must

(mʌst) nmustiness or mould[C17: back formation from musty]

must

(mʌst) n (Brewing) the newly pressed juice of grapes or other fruit ready for fermentation[Old English, from Latin mustum new wine, must, from mustus (adj) newborn]

must

(mʌst) n (Zoology) a variant spelling of musth

must¹

(mʌst)

auxiliary v.andv., pres. sing.andpl. 1st, 2nd, and3rd pers. must, auxiliary verb. 1. (used to express obligation or imperative requirement): I must keep my promise. We really must go now. 2. (used to express requirement or compulsion by law, social convention, or morality): The rules must be obeyed. I must say, you look wonderful. 3. (used to express advisability or desirability): You really must read this book. 4. (used to express inevitability, necessity, or compulsion by natural laws): All good things must come to an end. One must eat to live. 5. (used to express logical necessity): There must be some mistake. 6. (used to express strong probability or reasonable expectation): You must be joking. He must be at least 70. 7. (used to express intention or determination, often persistence in something unwelcome): if you must know; Must you repeat everything I say? v.i. 8. Archaic. (sometimes used with ellipsis of go, get, or some similar verb readily understood from the context): We must away. adj. 9. necessary; vital: A raincoat is must clothing in this area. n. 10. something necessary, vital, or required: Getting enough sleep is a must. [before 900; Middle English most(e), Old English mōste, past tense of Middle English mote, Old English mot mote², 3rd singular of motan, c. Old Frisian mōta, Old Saxon mōtan to have cause to, must, Old High German muozan may; compare empty]

must²

(mʌst)

n. the juice of grapes or other fruit during fermentation. [before 900; Middle English, Old English < Latin mustum, short for vīnum mustum new wine]

must³

(mʌst)

n. mold; moldiness; mustiness.

must⁴

(mʌst)

n. musth.

must

Must is usually used to say that something is necessary. It can also be used to say that you believe that something is true. Must is called a 'modal'.

1. 'must', 'have to', 'have got to', and 'need to'

The expressions have to, have got to, and need to can sometimes be used with the same meaning as must.

The negative form of must is must not or mustn't. The negative forms of have to and have got to are don't have to and haven't got to. The negative form of need to is need not, needn't or don't need to. However, these negative forms do not all have the same meaning. This is explained below under negative necessity.

2. necessity in the present

Must, have to, have got to, and need to are all used to say that it is necessary that something is done.

I must go now.You have to find a solution.We've got to get up early tomorrow.A few things need to be done before we can leave.

After must you use an infinitive without to. Don't use a to-infinitive. Don't say, for example, 'I must to go now.'

If someone is required to do something regularly, for example as a job or duty, say that they have to do it. Don't use 'must'.

She has to do all the cooking and cleaning.We always have to write to our grandparents to thank them for our birthday gifts.

If someone is required to do something on a particular occasion, say that they have got to do it or, in formal English and American English, that they have to do it.

I've got to go and see the headmaster.We have to take all these boxes upstairs.

In formal English, must is used to say that someone is required to do something by a rule or law.

You must submit your application by the end of this month.3. necessity in the past

If you want to say that something was necessary in the past, you use had to. Don't use 'must'.

She couldn't stay because she had to go to work.We had to sit in silence.4. necessity in the future

If you want to say that something will be necessary in the future, you use will have to.

He'll have to go to hospital.We will have to finish this tomorrow.5. negative necessity

You use must not or mustn't to say that it is important that something is not done.

You must not be late.We mustn't forget the tickets.

If you want to say that it is not necessary that something is done, you use don't have to, haven't got to, needn't, or don't need to.

You don't have to eat everything on your plate.I haven't got to work tomorrow, so I can sleep late.You don't need to explain.

Be Careful!
Don't use 'must not', 'mustn't', or 'have not to' to say that it is not necessary that something is done. Don't say, for example 'You mustn't explain' when you mean that it is not necessary to explain.

To say that it was not necessary for something to be done on a particular occasion in the past, use didn't have to or didn't need to.

Fortunately, she didn't have to choose.I didn't need to say anything at all.See need6. strong belief

You use must to say that you strongly believe that something is true, because of particular facts or circumstances.

There must be some mistake.Oh, you must be Gloria's husband.

Have to and have got to can also be used in this way, but not when the subject is you.

There has to be way out.Money has got to be the reason.

You can use must with be and an -ing form to say that you believe something is happening.

He isn't in his office. He must be working at home.You must be getting tired.

Be Careful!
Don't use must with an infinitive to say that you believe something is happening. Don't say, for example, 'He isn't in his office. He must work at home'.

To say that you believe something is not true, use cannot or can't. Don't use 'must' or 'have to' with not.

The two statements cannot both be correct.You can't have forgotten me.See can - could - be able to

Thesaurus

Noun	1.	must - a necessary or essential thing; "seat belts are an absolute must"essential, necessary, requisite, necessity, requirement - anything indispensable; "food and shelter are necessities of life"; "the essentials of the good life"; "allow farmers to buy their requirements under favorable conditions"; "a place where the requisites of water fuel and fodder can be obtained"
	2.	must - grape juice before or during fermentationgrape juice - the juice of grapes
	3.	must - the quality of smelling or tasting old or stale or mouldymoldiness, mustinessstaleness - having lost purity and freshness as a consequence of aging
Adj.	1.	must - highly recommended; "a book that is must reading"essential - basic and fundamental; "the essential feature"

must

¹noun1. necessity, essential, requirement, duty, fundamental, obligation, imperative, requisite, prerequisite, sine qua non (Latin), necessary thing A visit to the motor museum is a must.verb1. ought to, have to, should, need to, be required to, have got to, be obliged to, be compelled to, be under an obligation to Mr. Allen must pay your legal costs.

must

²noun mould, rot, decay, mildew, mustiness, fustiness, fetor, mouldiness The air was heady with the smell of must.

must

verbTo be required or compelled to do:need.Idioms: have got to, have to, must needs.noun1. An act or course of action that is demanded of one, as by position, custom, law, or religion:burden, charge, commitment, duty, imperative, need, obligation, responsibility.2. Something indispensable:condition, essential, necessity, need, precondition, prerequisite, requirement, requisite, sine qua non.

Translations

必须不可少的事物应当很可能

must

(mast) – negative short form ˈmustn't (-snt) – verb1. used with another verb to express need. We must go to the shops to get milk.必须2. used, usually with another verb, to suggest a probability. They must be finding it very difficult to live in such a small house.很可能3. used, usually with another verb, to express duty, an order, rule etc. You must come home before midnight; All competitors must be under 15 years of age. （表示责任、命令、规定等）应当 noun something necessary, essential, or not to be missed. This new tent is a must for the serious camper.不可少的事物must have used to state a probability about something in the past. She must have been very young when she got married.谅必

must

→ 必须zhCN

We have to get him to a hospital (US)
We must get him to hospital (UK) → 必须送他去医院

must

verbSee a must do

See:

(even) the best of friends must part
(one) has made (one's) bed and (one) will have to lie in it
(one) made (one's) bed and (one) has to lie in it
(one) made (one's) bed and (one) must lie in it
a must
a must do
all good things must (come to an) end
All good things must end
All things must pass
as you make your bed, so you must lie on it
be losing it
Caesar's wife must be above suspicion
Desperate diseases must have desperate remedies
ears must be burning
Every tub must stand on its own bottom
he that would eat the fruit must climb the tree
He that would eat the kernel must crack the nut
he that would have eggs must endure the cackling of hens
he that would the daughter win must with the mother first begin
He that would the daughter win, must with the mother first begin
He who would climb the ladder must begin at the bottom
I must be off
I must love you and leave you
I must say
I must say good night
I really must go
if Mohammed will not go to the mountain
If the mountain will not come to Mahomet, Mahomet must go to the ...
if the mountain will not come to Mohammed
if the mountain won't come to Muhammad, Muhammad must go to the mounta
if two ride on a horse, one must ride behind
if you must
if you must (do something)
if you want peace, (you must) prepare for war
Let's do this again
must
must needs
must needs do something
needs must
Needs must when the devil drives
on no account
really must go
show must go on, the
the best of friends must part
the show must go on
They must have seen you coming
we must do this again (sometime)
We must learn to walk before we can run
What can't be cured must be endured
What goes up must come down
What must be, must be
you have made your bed and must lie in it
you must (learn to) walk before you (can) run
you must be joking
you must be joking!
you must be kidding (me)
You must lose a fly to catch a trout
Young men may die, but old men must die
Youth must be served

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Synonyms for must

noun necessity

Synonyms

verb ought to

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noun mould

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Synonyms for must

verb to be required or compelled to do

Synonyms

noun an act or course of action that is demanded of one, as by position, custom, law, or religion

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noun something indispensable

Synonyms

Synonyms for must

noun a necessary or essential thing

Related Words

noun grape juice before or during fermentation

Related Words

noun the quality of smelling or tasting old or stale or mouldy

Synonyms

Related Words

adj highly recommended

Related Words

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