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
sure that this
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "sure that this" is correct and usable in written English.
It can be used when expressing confidence or certainty about a particular situation or statement. Example: "I am sure that this is the right decision for our team moving forward."
✓ Grammatically correct
News & Media
Wiki
Science
Alternative expressions(2)
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
I'm not sure that this works.
News & Media
I'm not sure that this would work.
News & Media
I'm not sure that this is".
News & Media
Do I know for sure that this is the truth?
News & Media
I'm no longer sure that this is the case.
News & Media
"We want to be sure that this phenomenon stops".
News & Media
Kunkel, the roach professor, isn't sure that this is true.
News & Media
Am I sure that this is the right story?
News & Media
I'm not sure that this is a good idea.
News & Media
Was I sure that this man was my father?
News & Media
"We are sure that this will be done".
News & Media
Expert writing Tips
Best practice
Use "sure that this" when you want to express confidence or certainty about a situation or statement. Ensure that the context clearly supports your level of conviction.
Common error
Avoid using "sure that this" when you have limited evidence or the situation is speculative. Overstating your certainty can undermine your credibility if the outcome proves otherwise.
Source & Trust
78%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "sure that this" functions as a declarative expression, conveying a sense of certainty or confidence regarding a particular situation or statement. As supported by Ludwig, it's used to assert a belief with conviction.
Frequent in
News & Media
40%
Wiki
30%
Science
10%
Less common in
Formal & Business
8%
Reference
6%
Encyclopedias
6%
Ludwig's WRAP-UP
In summary, the phrase "sure that this" is a common and grammatically sound expression used to convey certainty or confidence. According to Ludwig, it's suitable for various contexts, particularly in news, media, and informal communication. While versatile, it is important to ensure that the degree of certainty expressed is justified by the available evidence to maintain credibility. Alternatives like "certain that this" or "confident that this" can be used to express similar sentiments with slightly different nuances.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
certain that this is
Replaces "sure" with "certain", indicating a strong belief in the truth of something.
convinced that this
Emphasizes the state of being persuaded or completely certain.
positive that this
Indicates a confident assertion about something.
confident that this
Highlights a feeling of self-assurance about something.
undeniable that this
Stresses the impossibility of denying the existence or truth of something.
no doubt that this
Expresses the absence of uncertainty or skepticism.
assured that this
Implies a guarantee or promise that something is true or will happen.
believe that this
Offers a more moderate level of certainty, suggesting acceptance as true.
trust that this
Expresses reliance on the truth or reliability of something.
verify that this
Focuses on confirming or establishing the truth or accuracy of something.
FAQs
How can I use "sure that this" in a sentence?
You can use "sure that this" to express confidence or certainty about something. For example, you might say, "I am "sure that this" plan will succeed if we all work together".
What phrases are similar to "sure that this"?
Similar phrases include "certain that this", "confident that this", or "convinced that this". The best choice depends on the specific nuance you want to convey.
Is it always appropriate to use "sure that this"?
While "sure that this" is grammatically correct, it's important to use it when your level of certainty is justified by the evidence. Overusing it can make you sound dogmatic.
What's the difference between "sure that this" and "I think that this"?
"Sure that this" expresses a high degree of certainty, while "I think that this" indicates a belief or opinion that may not be firmly held. Use "sure that this" when you have strong evidence or confidence, and "I think that this" when you are expressing a more tentative viewpoint.
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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
78%
Authority and reliability
4.5/5
Expert rating
Real-world application tested