must be known

USAGE SUMMARY

"must be known" is correct and usable in written English.
You can use it to indicate that something is a required or necessary fact that needs to be familiar with. For example, "The rules of the game must be known before participating."

✓ Grammatically correct

Science

Academia

News & Media

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

3. The decay constant must be known.

Encyclopedia Britannica

You must be known for your smile.

The New Yorker

Key parameters must be known in order to reduce it.

Journal of Sound and Vibration

Names of each guest must be known before submission.

Stanford University

A board must be known for diverse thinking and perspective.

Harvard University

A board must be known as independent and strong-minded.

Harvard University

These and other parameters must be known as a function of crystal orientation.

Journal of Computational Physics

In these methods, production rate and flowing bottom hole pressure must be known.

Journal of Petroleum Science and Engineering

This means that all the hazards must be known and their related risks must be reduced.

Reference Module in Chemistry, Molecular Sciences and Chemical Engineering

To have a good reproducibility, the material properties of components must be known.

Aerospace Science and Technology

However, accurate phase behavior and equilibrium must be known to properly understand and engineer these systems.

The Journal of Supercritical Fluids

Expert writing Tips

Best practice

Use "must be known" when emphasizing the critical necessity of certain information for a task, decision, or understanding. It is best used when implying a requirement rather than a suggestion.

Common error

Avoid using "must be known" when "should be known" or "could be known" is more appropriate. Overusing "must" can make your writing sound overly demanding or dogmatic when a softer approach is sufficient.

Linguistic Context

The phrase "must be known" functions as a passive construction indicating necessity or obligation. It highlights that certain information or facts are essential and required. As Ludwig AI explains, it emphasizes a required fact.

Expression frequency: Very common

Frequent in

Science

48%

Academia

21%

News & Media

13%

Less common in

Encyclopedias

3%

Wiki

2%

Formal & Business

1%

Ludwig's WRAP-UP

In summary, "must be known" is a grammatically correct phrase used to indicate that certain information is essential or required. Ludwig AI confirms its proper usage. It is prevalent in scientific, academic, and news contexts, signaling a high degree of necessity. While common, it is important to use it judiciously, favoring alternatives like "should be known" in contexts where a less assertive tone is appropriate. The best practice is to reserve "must be known" for situations where the information is truly critical. This phrase serves to highlight the absolute necessity of understanding particular facts or concepts for effective action or decision-making.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

needs to be known

This alternative emphasizes the requirement for information to be available, using "needs" instead of "must".

has to be known

This alternative uses "has to be" which is slightly less formal than "must be" but conveys the same sense of obligation.

should be known

This alternative suggests a recommendation or expectation rather than a strict requirement implied by "must".

is required to be known

This alternative is more formal and emphasizes the necessity through a passive construction.

it is essential to know

This shifts the focus to the act of knowing, highlighting the importance of possessing the information.

it is vital to know

Similar to 'essential', this emphasizes the importance of the knowledge, but with a stronger sense of urgency.

knowledge of is necessary

This alternative restructures the sentence to emphasize the necessity of knowledge in a particular area.

information is needed

This alternative focuses on the requirement for information rather than the state of being known.

awareness is crucial

This alternative replaces 'known' with 'awareness', highlighting the importance of understanding.

the facts are indispensable

This alternative emphasizes the necessity of facts being available and accurate.

FAQs

How can I use "must be known" in a sentence?

Use "must be known" to express that specific information is essential or required. For example, "The risks involved "must be known" before proceeding with the experiment."

What are some alternatives to "must be known"?

Alternatives include "needs to be known", "has to be known", or "is required to be known". Choose the alternative that best fits the context and level of formality you want to convey.

When is it appropriate to use "must be known" rather than "should be known"?

"Must be known" implies a stricter requirement than "should be known". Use "must be known" when the information is absolutely necessary, while "should be known" suggests a recommendation.

How does the tone of "must be known" compare to that of "it is important to know"?

"Must be known" is more assertive and emphasizes a non-negotiable requirement. "It is important to know" is less forceful and simply highlights the significance of the information without implying a strict demand.