must do

USAGE SUMMARY

"must do" is correct and usable in written English.
You can use it to express a requirement or obligation. For example: "I must do the dishes before I go to bed."

✓ Grammatically correct

News & Media

Formal & Business

Wiki

Human-verified examples from authoritative sources

Exact Expressions

59 human-written examples

Traditionalists must do more.

The New Yorker

"Cuba must do this.

The New York Times

They must do more.

The Economist

We must do this".

Independent

They must do so.

The Economist

Must do something soon.

The New Yorker

We must do more.

The New York Times

We must do something.

The New York Times

He must do so.

Independent

– We must do what we must do.

The Guardian - Books

Human-verified similar examples from authoritative sources

Similar Expressions

1 human-written examples

A must-do event.

The New York Times - Sports

Expert writing Tips

Best practice

Avoid overusing "must do" in informal contexts where a softer suggestion might be more appropriate. Consider alternatives like "should do" or "need to do" to maintain a conversational tone.

Common error

Don't use "must do" when the action is merely a suggestion or a preference. Reserve it for situations where the action is critical, non-negotiable, or essential for success or compliance. Using it loosely weakens its impact and can mislead your audience.

Linguistic Context

The phrase "must do" functions primarily as a modal verb construction, indicating a strong obligation, necessity, or requirement. As shown by Ludwig, this structure directly precedes a verb to emphasize the importance of the action. The modal verb "must" conveys the sense of duty or essential action.

Expression frequency: Very common

Frequent in

News & Media

49%

Formal & Business

19%

Wiki

10%

Less common in

Science & Research

4%

The New York Times - Sports

1%

The New York Times - Arts

1%

Ludwig's WRAP-UP

In summary, "must do" is a versatile phrase used to express a strong sense of obligation or necessity. As Ludwig AI confirms, it is grammatically sound and commonly used across diverse contexts, from news and formal business communications to general advice. When considering alternatives, remember that options like "have to do" and "need to do" can offer similar meanings with slight variations in tone and formality. Avoid using "must do" for actions that are merely suggestions, and recognize that it's most impactful when highlighting critical, non-negotiable requirements.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

have to do

This alternative is a more informal way of expressing obligation.

need to do

This alternative indicates a necessity but can sometimes imply less urgency than "must do".

should do

This alternative suggests a recommendation or advisability, rather than a strict obligation.

ought to do

This alternative is a more formal way of expressing a moral obligation or duty.

it is essential to do

This alternative emphasizes the importance or crucial nature of the action.

it is imperative to do

This alternative stresses the urgency and necessity of the action.

it is necessary to do

This alternative focuses on the requirement or need for the action.

it is vital to do

This alternative highlights the critical importance of the action for a successful outcome.

are required to do

This alternative indicates the obligatory nature, enforced by rules or regulations, of performing the action.

it's a must

This alternative is shorter, emphasizing the importance and recommendation in doing something.

FAQs

How can I use "must do" in a sentence?

You can use "must do" to express a strong obligation or necessity. For example, "We "must do" everything we can to help those in need" or "You "must do" your homework before watching TV".

What can I say instead of "must do"?

You can use alternatives like "have to do", "need to do", or "should do" depending on the specific context and level of obligation.

Is "must to do" grammatically correct, or is it "must do"?

"Must to do" is grammatically incorrect. The correct form is ""must do"". The modal verb "must" is always followed by the base form of the verb without "to".

What's the difference between "must do" and "have to do"?

While both ""must do"" and "have to do" express obligation, "must do" often implies a sense of internal obligation or urgency, while "have to do" can suggest an external requirement or rule. However, in modern usage, they are often interchangeable.