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
CEO of Professional Science Editing for Scientists @ prosciediting.com
are certain as
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "are certain as" is not correct in standard written English.
It is not a commonly used expression and may lead to confusion without proper context. Example: "They are certain as the sun rises in the east."
⚠ May contain grammatical issues
News & Media
Science
Academia
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
4 human-written examples
The only counterpoint was that none of the outcomes are certain as yet.
Academia
Only a couple of things are certain as this book winds toward its hints at a sequel: that Archie has finally figured out how to thwart Gretchen, that he has made resolutions that he's bound to break, and that he and Susan can work as an effective team in an atmosphere rife with sexual tension.
News & Media
It can be seen from (B.6) that is constant when the channel-usage and collision tolerable level are certain as.
What impacts higher order invasive species have less are certain, as fewer studies are available to test the validity of these beliefs [2], [11].
Science
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
One thing is certain: as much as Mr. Bush likes his ranch, he likes winning more.
News & Media
Oreskes noted that scientists were certain as early as the 1960s and the evidence has mounted since then.
Academia
It's from True West magazine, and it reads, "One thing is certain: as long as there are writers as skillful as Elmer Kelton, Western literature will never die".
News & Media
Exposure to the nano-particles of the ambient aerosol is certain as long as people need to breathe.
One thing is certain as I prepare to teach another course on U.S. history.
News & Media
We cannot be certain, as there follows an 18-month gap in the diary until the end of 1877.
News & Media
What is certain as certain can be at this distance in time, is that he would see it as an issue that had to be tackled.
News & Media
Expert writing Tips
Best practice
Opt for clearer and more grammatically sound alternatives like "are sure that" or "are confident that" to ensure your writing is easily understood and avoids potential misinterpretations.
Common error
Using "are certain as" can sound unnatural. Instead, use established expressions like "are as certain as" or rephrase for better clarity, such as "are sure" or "are confident".
Source & Trust
84%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "are certain as" functions as a predicate adjective aiming to express a degree of confidence or sureness. However, according to Ludwig AI, this construction is considered non-standard. It often requires completion to be grammatically sound, such as in the pattern "are as certain as".
Frequent in
News & Media
33%
Science
33%
Academia
33%
Less common in
Encyclopedias
0%
Wiki
0%
Formal & Business
0%
Ludwig's WRAP-UP
In summary, the phrase "are certain as" is considered grammatically incorrect and not a standard expression in English, according to Ludwig AI. Although it appears across various contexts such as News & Media, Science, and Academia, its frequency is rare. Because of its awkward phrasing, it's recommended to use clearer, more established alternatives like "are sure that" or "are confident that" to ensure better clarity and understanding. When a more idiomatic construction is desired, consider options such as "are as certain as" followed by a simile. Always aim for grammatical correctness and clarity in your writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
are sure that
Replaces "certain as" with a more direct expression of certainty.
are confident that
Indicates a strong belief or expectation, similar to being certain.
can be sure of
Emphasizes the possibility of guaranteeing something.
can be certain of
Expresses the ability to have assurance about something.
are assured that
Suggests a level of confirmation or guarantee has been given.
are convinced that
Highlights a strong belief based on evidence or reasoning.
firmly believe that
Implies a strong and unwavering conviction.
definitely think that
Expresses a clear and unambiguous opinion.
have no doubt that
Indicates a complete lack of uncertainty.
it is beyond question that
Emphasizes that something is undeniably true.
FAQs
How can I use a phrase similar to "are certain as" correctly?
You can use phrases like "are as certain as" or "are sure that" which are grammatically correct and widely accepted.
What's a better alternative to "are certain as" in formal writing?
In formal writing, it's best to use "are confident that" or "are convinced that" as they convey certainty in a professional manner.
When is it appropriate to use "are certain as"?
It's generally not advisable to use "are certain as" as it is not a standard English phrase. Instead, consider using more common and accepted alternatives.
Is "are certain as" grammatically correct?
No, "are certain as" is not grammatically correct. It's better to use phrases like "are sure that" or "are as certain as" depending on the context.
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.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
84%
Authority and reliability
2.8/5
Expert rating
Real-world application tested