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

is certain about

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "is certain about" is correct and usable in written English.
You can use it when expressing confidence or assurance regarding a particular fact or situation. Example: "She is certain about her decision to move to a new city for her job."

✓ Grammatically correct

News & Media

Formal & Business

Science

Human-verified examples from authoritative sources

Exact Expressions

55 human-written examples

AEMON CANNON is certain about little as he contemplates life after graduation from Santana High School.

News & Media

The New York Times

One thing he is certain about is that if not for Next Street, a four-year-old, 22-employee merchant bank with offices in Boston and New York, his development company would have been in big trouble.

News & Media

The New York Times

What he is certain about is that he intends to surround himself with passionate people.

News & Media

Los Angeles Times

What she is certain about is that she wants to go back to her birth country, Trinidad, to help improve educational opportunities for deaf children.

Formal & Business

Unicef

One thing is certain about Villegas.

But not everyone is certain about Jacobs.

But nothing is certain about this tournament.

But he is certain about a few things.

News & Media

The New York Times

Hardly anything is certain about the Mets' off-season plans.

News & Media

The New York Times

"What is certain about my character Bill is that he lies all the time.

News & Media

Independent

One thing is certain about David Dorfman's "Come, and Back Again": the show has heart.

Show more...

Expert writing Tips

Best practice

Combine "is certain about" with specific details to strengthen your statement. Example: "She is certain about her decision to pursue a career in medicine, having volunteered at the local hospital for years."

Common error

Avoid using "is certain about" without providing context or evidence. A statement like "He is certain about the future" lacks credibility. Instead, be specific: "He is certain about the company's future growth, citing the innovative product line and expanding market share."

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

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

86%

Authority and reliability

4.5/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "is certain about" functions as a verb phrase expressing a state of strong conviction or assurance. Ludwig AI examples show it is used to indicate a firm belief regarding a specific subject or situation. It often precedes a statement of fact or opinion, lending it authority.

Expression frequency: Very common

Frequent in

News & Media

75%

Formal & Business

15%

Science

10%

Less common in

Encyclopedias

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "is certain about" is a grammatically correct and commonly used expression to convey strong conviction or assurance. According to Ludwig AI, it functions to express a firm belief and instill confidence in the listener or reader. The phrase is most frequently found in News & Media contexts, but also appears in Formal & Business and Scientific domains. It's important to use "is certain about" with specific evidence or context to enhance credibility and avoid vagueness. Alternatives include "is sure of" and "is confident in", but the choice depends on the specific nuance you wish to convey.

FAQs

How can I use "is certain about" in a sentence?

Use "is certain about" to express a strong conviction or assurance regarding something. For instance, "The analyst "is certain about" the company's positive earnings report."

What are some alternatives to "is certain about"?

You can use phrases like "is sure of", "is convinced of", or "is confident in" depending on the context.

What's the difference between "is certain about" and "is sure about"?

While both express confidence, "is certain about" may imply a slightly stronger level of conviction than "is sure about". They are often interchangeable, but "certain" suggests a more definitive assessment.

Is it better to say "is certain of" or "is certain about"?

Both "is certain of" and "is certain about" are grammatically correct and widely used. The choice often depends on personal preference and the specific context, as there's no significant difference in meaning.

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

86%

Authority and reliability

4.5/5

Expert rating

Real-world application tested

Most frequent sentences: