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Justyna Jupowicz-Kozak quote

Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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Must

Grammar usage guide and real-world examples

USAGE SUMMARY

The word "must" is a correct and commonly used word in written English.
It is often used to express a requirement or obligation. Example: "You must have a driver's license to operate a motor vehicle."

✓ Grammatically correct

News & Media

Formal & Business

Science

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

"It must be the spirit of the place".

"We must show them the multitude of statements of condemnation from British Muslims, show them these men of hate have no place in our mosques or any place of worship, and that they do not speak for Muslims in Britain or anywhere in the world.

News & Media

The Guardian

"We must show our young people, who may be targeted, that extremists have nothing to offer them.

News & Media

The Guardian

We must show them that there are other ways to express disagreement, that their right to do so is dependent on the very freedoms that extremists seek to destroy.

News & Media

The Guardian

You must take legal action now or you may lose the opportunity to do so due to future legal obstacles".

These tragedies must end.

News & Media

The New York Times

And as we meet here, we again declare that the regime of Bashar al-Assad must come to an end so that the suffering of the Syrian people can stop and a new dawn can begin.

News & Media

The New York Times

That must not happen".

News & Media

The New York Times

It must be done.

That must have hurt.

Needs must.

Show more...

Expert writing Tips

Best practice

Employ "must" to indicate a logical conclusion or certainty based on evidence. For example, "The lights are on; someone must be home."

Common error

Avoid using "must" in situations where a softer, more polite request is appropriate. Overusing "must" can sound demanding or impolite. Instead of saying "You must send me the report immediately", consider "Could you please send me the report as soon as possible?"

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

94%

Authority and reliability

4.6/5

Expert rating

Real-world application tested

Linguistic Context

The modal verb "must" primarily functions to express obligation, necessity, or strong recommendation. As evidenced by Ludwig, it's used to indicate what is required or essential. Additionally, "must" can express a logical deduction or certainty based on available evidence.

Expression frequency: Very common

Frequent in

News & Media

60%

Formal & Business

20%

Science

20%

Less common in

Encyclopedias

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

In summary, the modal verb "must" is a versatile word used to express obligation, necessity, or logical deduction. As confirmed by Ludwig, its grammatical status is correct, and it appears very commonly in various contexts, particularly in News & Media and Formal & Business settings. While "must" effectively conveys strong requirements, it's important to be mindful of the tone and consider softer alternatives like "should" or "need to" for more polite requests. With a high expert rating and a strong source quality score, "must" remains a reliable and essential component of the English language.

FAQs

How do I use "must" to show obligation?

Use "must" to express a strong obligation or requirement. For example, "Employees "must attend" the safety training session."

When can "must" indicate a logical conclusion?

"Must" can suggest a logical deduction based on evidence. For example, if you see footprints in the snow, you might say, "Someone "must have walked" here recently."

Is it better to use "must" or "have to"?

Both "must" and "have to" express obligation, but "must" often implies a stronger, more personal sense of necessity or a rule set by the speaker, while "have to" often indicates an external obligation or law.

What are some alternatives to "must" for softer requests?

For more polite requests, consider using alternatives like "should", "could", or "need to" to soften the tone.

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Source & Trust

94%

Authority and reliability

4.6/5

Expert rating

Real-world application tested

Most frequent sentences: