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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
CEO of Professional Science Editing for Scientists @ prosciediting.com
was certain about
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "was certain about" is correct and usable in written English.
You can use it when expressing a strong belief or conviction regarding a particular subject or situation. Example: "She was certain about her decision to move to a new city for a fresh start."
✓ Grammatically correct
News & Media
Science
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
29 human-written examples
But he said he was certain about Mr. Kerry's guarantee.
News & Media
One thing Wilson said he was certain about was the goaltending.
News & Media
Anyway, Andrea was a nice person — he was certain about that.
News & Media
Officer Martin said he was certain about one thing: "I won't get them back".
News & Media
The couple was certain about marriage and ignored advice from friends and family who said they were too young.
News & Media
And on the 30th, when I saw so many people in the streets, I was certain about it.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
29 human-written examples
AEMON CANNON is certain about little as he contemplates life after graduation from Santana High School.
News & Media
What he is certain about is that he intends to surround himself with passionate people.
News & Media
It's like chalk and cheese, as everything they were certain about is turned upside down by reality!
Wiki
"I'm certain about that.
News & Media
One thing is certain about Villegas.
News & Media
Expert writing Tips
Best practice
When using "was certain about", ensure that the context provides some indication of the basis for the certainty, whether it's observation, knowledge, or intuition.
Common error
Avoid using "was certain about" when the evidence is weak or speculative. Overstating your confidence can undermine your credibility if the certainty proves to be unfounded.
Source & Trust
91%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "was certain about" functions as a predicate adjective phrase, modifying a subject and expressing a state of strong conviction or confidence. It indicates that someone held a firm belief or had no doubt regarding a particular matter, as Ludwig AI confirms.
Frequent in
News & Media
64%
Science
25%
Wiki
7%
Less common in
Formal & Business
0%
Academia
0%
Encyclopedias
0%
Ludwig's WRAP-UP
The phrase "was certain about" is a common and grammatically sound way to express strong conviction or confidence. Ludwig AI analysis highlights its prevalence in news and media, indicating a neutral register suitable for various contexts. When writing, ensure that the certainty is justified by evidence or a clear basis. While interchangeable with alternatives such as "was sure about" or "was convinced about", it's crucial to avoid overstating certainty without adequate support.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
was sure about
Indicates a feeling of confidence or conviction about something.
was convinced about
Implies a state of being persuaded or completely sure about something.
was positive about
Suggests a confident and affirmative stance regarding something.
felt confident about
Emphasizes the feeling of assurance regarding a particular matter.
had no doubt about
Indicates a complete lack of uncertainty or skepticism.
was assured about
Implies a received confirmation or guarantee about something.
was definite about
Highlights the clarity and explicitness of one's certainty.
believed firmly in
Focuses on a strong and unwavering belief in something.
was unwavering in
Emphasizes the steadfast and resolute nature of one's certainty.
held the conviction that
Highlights a deeply held and firm belief or opinion.
FAQs
How can I use "was certain about" in a sentence?
You can use "was certain about" to express a strong belief or conviction. For example, "She "was certain about" her decision to accept the job offer."
What are some alternatives to "was certain about"?
Alternatives include "was sure about", "was convinced about", or "was positive about", depending on the specific nuance you want to convey.
Is it better to use "was certain of" or "was certain about"?
Both "was certain of" and ""was certain about"" are grammatically correct and can be used interchangeably. However, ""was certain about"" is slightly more common in contemporary usage.
When should I avoid using "was certain about"?
Avoid using ""was certain about"" if you want to express a degree of uncertainty or doubt. In such cases, consider using phrases like "suspected", "believed", or "assumed".
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
91%
Authority and reliability
4.5/5
Expert rating
Real-world application tested