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 a sharp eye on
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "keep a sharp eye on" is correct and usable in written English.
It can be used when advising someone to pay close attention to something or someone, often to ensure safety or to monitor a situation closely. Example: "As the storm approaches, make sure to keep a sharp eye on the weather updates."
✓ Grammatically correct
News & Media
Wiki
Alternative expressions(20)
pay close attention to
monitor closely
stay vigilant
be on the lookout for
exercise caution regarding
keep under observation
mind carefully
maintain surveillance over
scrutinize carefully
watch closely
keep a fatherly eye on
keep a good eye on
keep under surveillance
keep a strict eye on
keep a beady eye on
keep a wary eye on
keep a critical eye on
keep a careful eye on
keep a constant eye on
be vigilant about
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
19 human-written examples
Mr Cardoso and the world have also to keep a sharp eye on Congress.
News & Media
Considering the sharp instruments and heavy materials used, judges have to keep a sharp eye on proceedings.
News & Media
We need to avoid this pattern in 2016, and keep a sharp eye on the long term".
News & Media
This sentiment, that there are seasons within seasons (call it microseasonality), is the latest paradigm for chefs and home cooks who keep a sharp eye on the calendar.
News & Media
You'd need to keep a sharp eye on your soul, and maybe your wallet too, if he sidled up beside you.
News & Media
As interest rates creep up, it is only natural for investors to keep a sharp eye on Alan Greenspan, the Federal Reserve chairman.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
40 human-written examples
FRANKFURT -- European countries need to keep a sharper eye on one another's finances, and sanctions against fiscal rule-breakers should kick in automatically, the European Central Bank president, Jean-Claude Trichet, said on Monday.
News & Media
Keep a sharp eye out on newspapers, television commercials, radio advertisements and the Internet for special pricing.
Wiki
The report had recommended that NSF lean on Antarctic scientists to keep a sharper eye on the costs of instrumentation deployment and operation support by considering those costs in the review and selection of science projects.
Science & Research
He keeps a sharp eye on prices.
News & Media
Jiri Dienstbier, a dissident who became Czechoslovakia's first post-revolutionary foreign minister in 1989, kept a sharp eye on them.
News & Media
Expert writing Tips
Best practice
Use the phrase "keep a sharp eye on" when you want to emphasize the need for careful and vigilant observation, especially when potential risks or problems are anticipated. For example, "Keep a sharp eye on the market trends to identify new opportunities."
Common error
While "keep a sharp eye on" is a useful idiom, avoid overusing it in your writing. Vary your language by using synonyms like "monitor closely" or "pay close attention to" to prevent your writing from sounding repetitive.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "keep a sharp eye on" functions as an idiomatic expression used to advise or instruct someone to watch something or someone carefully. Ludwig confirms its usability.
Frequent in
News & Media
75%
Wiki
15%
Formal & Business
5%
Less common in
Science
2%
Encyclopedias
2%
Reference
1%
Ludwig's WRAP-UP
The phrase "keep a sharp eye on" is a common idiom that advises careful and vigilant observation, particularly when anticipating risks or problems. According to Ludwig, the phrase is correct and usable in written English. It's most frequently found in news and media contexts, demonstrating its wide applicability. While effective, it's advisable to avoid overuse and consider synonyms like "monitor closely" or "pay close attention to". The phrase carries a neutral register, suitable for diverse writing styles, emphasizing its versatility in communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
pay close attention to
A more general term for observing carefully, lacking the implied threat.
be on the lookout for
Implies searching for something specific, often something anticipated.
monitor closely
Focuses on tracking and reviewing progress or changes in something.
remain vigilant toward
Emphasizes sustained alertness and preparedness for potential issues.
watch like a hawk
Emphasizes intense and unwavering attention, often with protective intent.
exercise caution regarding
Highlights the need for careful and prudent action in relation to something.
keep under observation
Indicates a sustained watch, often in a controlled environment.
mind carefully
Refers to tending to someone/something with caution.
maintain surveillance over
Suggests a more formal and systematic approach to watching something.
scrutinize carefully
Highlights the need for detailed examination to identify potential issues.
FAQs
How can I use "keep a sharp eye on" in a sentence?
You can use "keep a sharp eye on" to advise someone to watch something carefully. For instance, "Keep a sharp eye on the departures board" when you are waiting for the train schedule.
What's a less idiomatic alternative to "keep a sharp eye on"?
Alternatives to "keep a sharp eye on" include "pay close attention to", "monitor closely", or "stay vigilant", depending on the context.
Is it acceptable to say "kept a sharp eye on" instead of "keep a sharp eye on"?
Yes, "kept a sharp eye on" is the past tense form and is grammatically correct when referring to a past action. For example, "The security guard "kept a sharp eye on" the entrance."
What's the difference between "keep a sharp eye on" and "keep a close eye on"?
While both phrases mean to watch carefully, "keep a sharp eye on" often implies a more acute awareness of potential danger or problems. "Keep a close eye on" is a general term for watching carefully.
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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
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested