Difference Between Must and Ought To

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In English grammar, there are many words and phrases that looks and sounds the same but have a different meaning. The two such and confusing words are Must and Ought To. In this article, we will learn the Difference Between Must And Ought To.

Difference Between Must and Ought To:

The main difference between Must and Ought to is that Must does not change. It means the whatever the tense, the number or a person of the subject, Must remain unchanged. Must is used to express ideas like a compulsion or strong duty. Ought To is unlike from other auxiliary verbs, as it is followed by a to-infinitive. Whereas, Ought To is an expression of such ideas like necessity duty or any moral obligation.

What Is The Meaning Of Must?

Must is a word that does not change, no matter what the tense or number and person of the subject. It can be mention as present or future. But, can only be utilized as past when it is used with the present perfect tense of the principal verb

Comparison Of Must With Various Tense:

He must do his work now. (present)

He must have done his work. (past)

He must do work. (future)

Uses of Must:

Must express compulsion or strong obligation. We talk about necessity while using must.

You must pay your fine.

You must say sorry for your mistake.

We must have to be loyal to our country.

It can be used to express the need for necessity.

She must improve her reading skills

You must go to bed early.

‘Must’ can be used to express probability or likelihood.

He must have already left the bus stop.

Annie is not picking the call. She must be busy at work.

Must signify strong determination.

I must have my own personality.

What Is The Meaning Of Ought To?

Ought To is unlike from other auxiliary verbs, as it is followed by a to-infinitive. Whereas, Ought To is an expression of such ideas like necessity duty or any moral obligation.

Uses Of Ought To:

As Ought to expresses the moral obligation or duty. It has not forceful meaning like a must. It is stronger than should or must.

We ought to help the needy poor people. (duty)

You ought to exercise to stay fit. (necessity)

You ought to visit your parents, once a week. (duty)

When using ought to is used to refer past, it is written before any perfect infinitive.

You ought to have helped your mother.

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