must know

USAGE SUMMARY

"must know" is correct and usable in written English.
You can use it to express something that is essential to know or believe. For example, "Students must know the material before taking the test."

✓ Grammatically correct

News & Media

Formal & Business

Wiki

Human-verified examples from authoritative sources

Exact Expressions

57 human-written examples

"Somebody must know something".

The New York Times

"We must know.

The Economist

He must know me".

The New Yorker

She must know.

The New Yorker

"I must know.

The New Yorker

"You must know that".

The New Yorker

But I must know.

The New Yorker

"So he must know".

The New York Times - Magazine

Human-verified similar examples from authoritative sources

Similar Expressions

3 human-written examples

In Photos: Must-know Packing Advice.

Forbes

Assembly language is a must-know.

WikiHow

You must know who your audience are!

WikiHow

Expert writing Tips

Best practice

When using "must know", ensure the context clearly indicates the information is essential for the audience to understand or act upon. For example, "You "must know" the safety procedures before operating the machinery."

Common error

Avoid using "must know" when "should know" or "it's helpful to know" would be more appropriate. Overusing "must know" can diminish its impact and make your writing sound overly dramatic or demanding.

Linguistic Context

The phrase "must know" functions as an auxiliary verb construction, indicating necessity or obligation regarding knowledge. It emphasizes the importance of understanding or being aware of something. Ludwig provides various examples showing its use in diverse contexts.

Expression frequency: Very common

Frequent in

News & Media

55%

Formal & Business

15%

Wiki

12%

Less common in

Science

8%

Academia

5%

Reference

5%

Ludwig's WRAP-UP

In summary, "must know" is a versatile phrase used to express the critical importance of having specific knowledge. As Ludwig AI confirms, it is grammatically correct and widely used across various contexts, predominantly in news, media, and professional settings. When using this phrase, consider its impact and ensure it aligns with the context, avoiding overuse in less critical situations. Alternatives like "need to know" or "should understand" can provide a more nuanced approach. Remember that the primary goal is to emphasize the necessity of understanding or awareness, making it essential for effective communication.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

it's important to understand

Highlights the significance of comprehension, suggesting that grasping a concept is key.

need to comprehend

Emphasizes the importance of thorough understanding, implying that more than just basic knowledge is required.

need to be aware of

Focuses on awareness as the necessary outcome, shifting the emphasis from the act of knowing to the state of being informed.

it is essential to realize

Focuses on the crucial nature of realization, highlighting the significance of understanding a particular fact or situation.

should be informed about

Highlights the importance of receiving information, suggesting a responsibility to stay updated.

it's crucial to acknowledge

Stresses the critical nature of acknowledgment, suggesting that acceptance or recognition is vital.

are required to understand

Emphasizes the necessity of comprehension, indicating that a certain level of understanding is mandatory.

have to be conscious of

Implies a need for constant awareness, indicating that vigilance or attentiveness is necessary.

have to recognize

Stresses the act of acknowledging something, suggesting a realization that cannot be avoided.

should take into account

Shifts the focus to consideration, highlighting the necessity of factoring something into one's decision-making or understanding.

FAQs

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

"Must know" is used to emphasize the importance of understanding something. For example, "Students "must know" the basic principles of mathematics to succeed in advanced courses."

What are some alternatives to "must know"?

Alternatives include "need to know", "should understand", "have to be aware of", and "it is essential to realize". The choice depends on the specific nuance you want to convey. For example, instead of saying "You "must know" the regulations", you could say "You "need to know" the regulations" or "You "should understand" the regulations".

Is "must know" formal or informal?

"Must know" can be used in both formal and informal contexts, but it's often seen in more formal or instructive settings where emphasizing the necessity of information is important. The context of your writing determines its appropriateness.

When is it better to use "need to know" instead of "must know"?

"Need to know" is generally used when providing information that is necessary for a specific task or role. "Must know", on the other hand, conveys a broader sense of essential knowledge or understanding. For example, employees "need to know" their security clearance, but citizens "must know" their rights.