Must

Must

Must = We use ‘Must’ to express deduction, conclusion, strong obligation, necessity, a strong possibility, rule, law, invitation, encouragement, and criticism.

Modals = Modal Verbs are all about the expressions but not the action.

Must Rules

Must + Verb 1st form = He, She, It, I, You, We, They, This, That, These, Those, Singular Noun, and Plural Nouns…

Must Format

Affirmative = Subject + must + verb 1st form + other words.
Negative = Subject + must + not + verb 1st form + other words.

Must + not = mustn’t.

Simple Interro = Must + subject + verb 1st form + other words?
Simple Interro Negative = Must + subject + not + verb 1st form + other words?
Interrogative = Wh-family + must + subject + verb 1st form + other words?
Interrogative Negative = Wh-family + must + subject + not + verb 1st form + other words?

Must Definition

1. Deduction or Conclusion = We use “Must” to express a fact that we carefully think before expressing. We come to the conclusion after thinking carefully about something, we use “Must” to express that something.

e.g. – We do not use “Must not” for this definition. When we make a negative sentence, we use “Can not” in place of “Must not.”

She is so little. She must be 3 years old. (deduction or conclusion)
I have been blacklisted from everywhere. I cannot find a new job. [(deduction or conclusion) (~~He must not find a new job.~~)]
He loves her. He must propose to her tonight. (deduction or conclusion)
After researching for years, I can finally say. Girls can’t propose first. [(deduction or conclusion) (~~Girls mustn’t propose first.~~)]
They are not writing anything on the examination sheet. They must fail. (deduction or conclusion)

2. Strong Obligation or Necessity = We use “Must” to express strong obligation and necessity. It is like a direct and forceful obligation. Necessity means, “compulsory to do or happen.”

e.g. – You can understand the difference between “Strong Obligation” or “Necessity” by the expressions of the person.

They must build more public hospitals. (Necessity = Means of the sentence – It’s compulsory to build more public hospitals)
They must not enter here. (Necessity = Means of the sentence – It is your obligation that they do not enter.)
Must I find them before it’s too late? (Ask for Necessity = Means of the sentence – Is it compulsory for me to find them.)
To kill parasites, we must boil water. (Necessity = Means of the sentence – It is compulsory to boil water for killing parasites)
For how long must he hide there? (Ask for Necessity = Means of the sentence – For how long is it compulsory for him to hide there?)

3. Rules and Laws = We use “Must” to express any rules or laws. It is definite to follow the rules and laws. It is similar to necessity and a strong obligation to follow the rules and laws.

e.g. –

You must not park here. (rule or law)
You must not feed animals here in the zoo. (rule)
One must respect the honorable judge. (law)
People must wear the mask in a public place. (rule or law)
All students must wear school uniforms. (rule)

4. Formal and Polite Invitation = We use “Must” to express strong formal and polite invitations.

e.g. –

He must visit my home someday. (strong invitation)
You all must come to my wedding. (strong invitation)
They must work with us. (strong invitation)
She must join our family dinner. (strong invitation)
You must not enter this building. (strong no for invitation)

5. Criticism = We use “Must” to express criticism. We always make a question when we criticize using “Must.” For understanding the criticism, you focus on the expression of the person when they make a sentence.

e.g. –

Must they keep singing that terrible music? (criticism)
Why must he not understand anything quickly? (criticism)
When must she wake up early morning? (criticism)
Mustn’t you be any more stupid? (criticism)
How must you survive in school? (criticism)

6. Encouragement = We use “Must” to express encouragement. We motivate people using “Must.”

e.g. –

Come on! You must win the race. (encouragement)
We must pass this examination. (encouragement)
I must finish it before dinner. (encouragement)
This is high time. Everyone must participate. (encouragement)
I must stand on my feet because I can and I will. (encouragement)

7. Strong Possibility = We use “Must” when there is a strong chance to do or happen in the future. We express strong future possibility, we are not sure about it. We make a deduction and conclusion about it that is why there is a strong possibility.

e.g. –

Don’t start the party! He must join us within a minute. (strong possibility)
No problem. We must come with a new plan. (strong possibility)
When must they start worrying about their future? (ask for the strong possibility)
She must become a star someday. (strong possibility)
You must join the army next time. (strong possibility)

Modals = Modals are all about the expressions that do not take place. When we use Modals, we only express, we do not do it. When we do, we use Tense.

Modals – can, could, may, might, should, would, will, shall, ought to, and must, etc.