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
that is certain to
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that is certain to" is correct and usable in written English.
You can use it to express a strong assurance or inevitability about a particular outcome or event. Example: "The new policy changes are that is certain to improve employee satisfaction across the board."
✓ Grammatically correct
News & Media
Academia
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
60 human-written examples
ONE that is certain to get a serious hearing is scaling back the alternative minimum tax.
News & Media
The average tourist spends $120 a day, a figure that is certain to rise.
News & Media
"She would have enjoyed the public debate that is certain to happen after this tragedy.
News & Media
The Christian Democrats this week opened a debate that is certain to be central to next year's election.
News & Media
But Gardner won easily in a race that is certain to fuel questions about the electoral strategy of the incumbent.
News & Media
Featuring Jennifer Lawrence as Katniss Everdeen, it's a grim, stirring affair that is certain to build anticipation for the movie.
News & Media
The thinktank has launched a project on the future of Europe that is certain to influence Labour thinking.
News & Media
That argument, however, misunderstands the deeper, unresolved crisis that is certain to unfold in the aftermath of the Hutton inquiry.
News & Media
It was the kind of Reaganesque, "there-you-go-again" line that is certain to be trotted out on Tuesday.
News & Media
Nuclear Logics is a pioneering book that is certain to provide an invaluable resource for researchers, teachers, and practitioners while reframing the policy debate surrounding nonproliferation.
Academia
Drawing on unprecedented archival research, "Keep the Damned Women Out" is a breathtaking work of scholarship that is certain to be the definitive book on the subject.
Academia
Expert writing Tips
Best practice
Use "that is certain to" when you want to express a high degree of confidence about a future event or outcome. This phrase adds a sense of inevitability and assurance to your statement.
Common error
Avoid using "that is certain to" when the outcome is merely highly probable but not absolutely guaranteed. Overusing the phrase can undermine your credibility if the predicted event does not occur.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that is certain to" functions as a modal adjunct, specifically expressing a high degree of certainty or inevitability about a future event or outcome. As Ludwig confirms, the phrase is grammatically correct and widely used.
Frequent in
News & Media
68%
Academia
16%
Science
10%
Less common in
Formal & Business
4%
Wiki
2%
Reference
0%
Ludwig's WRAP-UP
In summary, "that is certain to" is a phrase used to express a high degree of certainty about a future event. According to Ludwig, the phrase is grammatically correct and common across various contexts, particularly in News & Media. It functions as a modal adjunct, serving to persuade or reassure the audience. When using this phrase, ensure the context warrants such a strong assertion to maintain credibility. Consider alternatives like "that will definitely happen" or "that is guaranteed to occur" for slight variations in emphasis.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
that will definitely happen
Replaces 'is certain to' with 'will definitely happen' for emphasis.
that is guaranteed to occur
Substitutes 'certain' with 'guaranteed' to highlight assurance.
that is sure to transpire
Replaces 'certain' with 'sure' and 'happen' with 'transpire' for a slightly more formal tone.
that is bound to happen
Uses 'bound to' instead of 'certain to' to convey inevitability.
it is inevitable that
Restructures the sentence to emphasize inevitability directly.
it will undoubtedly occur
Uses 'undoubtedly' to stress the certainty of the event.
it is assured to take place
Replaces 'certain' with 'assured' for a slightly more formal tone and uses 'take place' instead of 'happen'.
that is poised to occur
Uses 'poised to' to suggest readiness and inevitability.
it is slated to happen
Implies a scheduled inevitability.
it is destined to occur
Suggests that the outcome is predetermined.
FAQs
How can I use "that is certain to" in a sentence?
You can use "that is certain to" to express a high degree of confidence about a future event. For example, "The new marketing strategy is certain to increase sales."
What are some alternatives to "that is certain to"?
You can use alternatives like "that will definitely happen", "that is guaranteed to occur", or "that is bound to happen" depending on the context.
Which is correct, "that is certain to" or "that will certainly"?
Both "that is certain to" and "that will certainly" are grammatically correct. "That is certain to" emphasizes inevitability, while "that will certainly" emphasizes the speaker's confidence.
What's the nuance between "that is certain to" and "likely to"?
"That is certain to" indicates a very high degree of confidence or inevitability. "Likely to" suggests a high probability but leaves room for doubt. "That is certain to" implies stronger assurance than "likely to".
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
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested