Used and loved by millions

Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak quote

Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

MitStanfordHarvardAustralian Nationa UniversityNanyangOxford

be key of

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "be key of" is not correct in standard written English.
It is unclear and does not convey a clear meaning; a more appropriate phrase would be needed to express the intended idea. Example: "You need to be the key of our success" would be better phrased as "You need to be key to our success."

⚠ May contain grammatical issues

News & Media

Wiki

Science

Human-verified examples from authoritative sources

Exact Expressions

2 human-written examples

Staying on the field will be key, of course.

News & Media

The New York Times

The user experience will also be key, of course, and Audi has some interesting innovations there with the Aicon, too, including a companion drone that comes with the car, and a built-in "empathetic electronic vehicle assistant".

News & Media

TechCrunch

Human-verified similar examples from authoritative sources

Similar Expressions

55 human-written examples

Body language is key, of course, as this is a movie all about bods.

The midfield is key of them, playing high-tempo, pressing football.

News & Media

BBC

Confidence is key of everything.

"That's what the equity markets are keying off of".

News & Media

The New York Times

Systems like LinkNYC will be key components of Flow.

News & Media

The New Yorker

That was key for both of them".

Partnerships are key to all of that.

News & Media

The Guardian

Resources of information is key to success.

Several of them are key components of conserved signaling pathways.

Show more...

Expert writing Tips

Best practice

Avoid using the phrase "be key of". Instead, use grammatically correct alternatives like "be key to", "be crucial for", or "be essential to" to ensure clarity and professionalism in your writing.

Common error

A common mistake is using "of" after "key" when "to" is the correct preposition. Ensure you use "be key to" rather than "be key of" to maintain grammatical accuracy. The correct usage emphasizes the relationship between something and its importance or success.

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

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

80%

Authority and reliability

1.8/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "be key of" attempts to function as a linking verb phrase, aiming to connect a subject with a description of its importance. However, this phrase is grammatically incorrect. A more appropriate construction would use "be key to". Ludwig AI indicates this is an incorrect usage.

Expression frequency: Rare

Frequent in

News & Media

33%

Wiki

33%

Science

33%

Less common in

Formal & Business

0%

Academia

0%

Encyclopedias

0%

Ludwig's WRAP-UP

In summary, the phrase "be key of" is considered grammatically incorrect in standard English. Ludwig AI confirms that this is an erroneous construction. The intended meaning is to express that something is essential or crucial, but the correct way to convey this is by using phrases such as "be key to", "be crucial for", or "be essential to". While the phrase appears across various source types, including news, wikis, and scientific articles, this does not validate its usage; it highlights the importance of using correct grammar.

FAQs

What's the correct way to say something is essential: "be key of" or "be key to"?

The correct phrase is "be key to". The phrase "be key of" is grammatically incorrect and should be avoided. For example, instead of "Teamwork is key of our success", use "Teamwork is "key to" our success".

What can I use instead of the phrase "be key of"?

Since "be key of" isn't correct, you can use options such as "be essential to", "be crucial for", or "be vital for" depending on the context. These alternatives are grammatically sound and widely accepted.

How can I ensure I'm using the right preposition after "key"?

Always double-check the context. "Key to" is used to indicate something essential for achieving a goal, while "key for" can also be suitable, but not "key of". If in doubt, rephrase the sentence to use alternatives like "crucial for" or "essential to".

Is there a difference in meaning between "be key to" and "be important for"?

While both indicate significance, "be key to" suggests something is indispensable for success, whereas "be important for" simply means something has a significant impact. "Be key to" conveys a stronger sense of necessity and criticality.

ChatGPT power + Grammarly precisionChatGPT power + Grammarly precision
ChatGPT + Grammarly

Editing plus AI, all in one place.

Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.

Source & Trust

80%

Authority and reliability

1.8/5

Expert rating

Real-world application tested

Most frequent sentences: