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
keep sure
Grammar usage guide and real-world examplesUSAGE SUMMARY
'keep sure' is not a grammatically correct phrase to use in written English.
To express an idea similar to "be sure to keep something" you would use the phrase "make sure to keep". For example: Make sure to keep all of your receipts for tax season.
⚠ May contain grammatical issues
News & Media
Wiki
Alternative expressions(4)
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
2 human-written examples
If they came to power, they would probably keep Sure Start, but they also want to make child-care provision more flexible.
News & Media
Ministers have said that enough money remains in the system to keep Sure Start centres open, even as the coalition works to reduce the national deficit, but that they also want to see services better targeted to meet the needs of the poorest parents.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
Be sure to keep safe.
Wiki
"I'll need to keep improving, for sure.
News & Media
But for sure, keep training.
News & Media
So, sure, keep a couple mainstream pundits.
News & Media
If you're not sure, keep it simple.
Wiki
To keep calm make sure you're in your bed.
Wiki
But if you are really sure, keep on reading.
Wiki
"O.K.; make sure you keep that clean.
News & Media
Be sure to keep your goals realistic.
Academia
Expert writing Tips
Best practice
When aiming to convey the idea of ensuring something is maintained, use "make sure to keep" or "be sure to keep" instead of the ungrammatical "keep sure".
Common error
The phrase "keep sure" does not conform to standard English grammar. Using it can detract from your message and undermine your credibility. Always opt for grammatically correct alternatives such as "make sure to keep".
Source & Trust
82%
Authority and reliability
1.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "keep sure" is typically intended to function as an imperative, aiming to instruct someone to ensure or maintain something. However, according to Ludwig AI, this phrase is grammatically incorrect. Examples in Ludwig illustrate intended usage, but also highlight its non-standard nature.
Frequent in
Wiki
50%
News & Media
50%
Science
0%
Less common in
Formal & Business
0%
Encyclopedias
0%
Academia
0%
Ludwig's WRAP-UP
In summary, while you might encounter the phrase "keep sure", it's essential to recognize that it's grammatically incorrect in standard English. As Ludwig AI points out, phrases like "make sure to keep" or "be sure to keep" are the correct alternatives. Usage analysis shows it appearing in informal contexts like Wiki and News & Media, but its incorrect nature advises against using it in formal or professional settings. To ensure clear and credible communication, always opt for grammatically sound alternatives when expressing the need to maintain or ensure something.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
make sure to keep
Replaces "keep sure" with the correct grammatical structure for expressing the idea of ensuring that something is maintained.
be sure to keep
Another grammatically correct way to express the idea of ensuring something is maintained.
ensure you maintain
Uses a more formal verb, "ensure", to replace "make sure", and "maintain" to replace "keep".
guarantee you retain
Emphasizes certainty using "guarantee", and substitutes "retain" for "keep".
certainly preserve
Focuses on the act of preservation with certainty.
definitely hold on to
Replaces "keep" with the more informal "hold on to", while maintaining the sense of certainty.
absolutely safeguard
Suggests a higher level of protection and certainty.
positively conserve
Emphasizes conservation with a positive affirmation.
confidently sustain
Highlights the act of sustaining with confidence.
securely maintain
Focuses on the security aspect of maintaining something.
FAQs
What is the correct way to say "keep sure"?
The correct way to express the idea of ensuring something is maintained is to use phrases like "make sure to keep" or "be sure to keep".
Is "keep sure" grammatically correct?
No, "keep sure" is not grammatically correct in standard English. The correct phrasing involves using auxiliary verbs like "make" or "be" to form the imperative.
What are some alternatives to "keep sure" that I can use in my writing?
Instead of "keep sure", you can use phrases such as "ensure you maintain", "guarantee you retain", or "certainly preserve" depending on the context.
When should I use "make sure to keep" instead of "keep sure"?
Always use "make sure to keep" or "be sure to keep". "Keep sure" is ungrammatical and should be avoided in all contexts.
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
82%
Authority and reliability
1.8/5
Expert rating
Real-world application tested