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 close eye on
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'keep a close eye on' is correct and usable in written English.
You can use this phrase when referring to something that needs careful observation or monitoring. For example, "It's important to keep a close eye on your investments."
✓ Grammatically correct
News & Media
Wiki
Alternative expressions(20)
carefully watch
keep a fatherly eye on
scrutinize carefully
maintain surveillance over
mind carefully
keep a sharp eye on
keep under surveillance
closely monitor
keep a tight eye on
pay close attention to
keep a beady eye on
keep tabs on
keep a careful eye on
be on the lookout for
keep a constant eye on
be vigilant about
keep a strong eye on
observe attentively
keep a concerned eye on
monitor carefully
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
Keep a close eye on this one.
News & Media
In other words, one to keep a close eye on.
News & Media
Heavies keep a close eye on Hall.
News & Media
"We'll keep a close eye on him".
News & Media
They should also keep a close eye on venture capitalists.
News & Media
We have to keep a close eye on it".
News & Media
T.T.: Do you keep a close eye on your health?
News & Media
Best to keep a close eye on her.
News & Media
We have to keep a close eye on him".
News & Media
Keep a close eye on costs and waste.
News & Media
Police keep a close eye on him every day.
News & Media
Expert writing Tips
Best practice
When using "keep a close eye on", ensure the context clearly indicates what is being monitored and why it is important. For example, "Keep a close eye on the market trends to anticipate future opportunities."
Common error
Avoid using "keep a close eye on" repeatedly in a single piece of writing. Vary your language by using synonyms like "monitor", "observe", or "watch" to maintain reader engagement.
Source & Trust
78%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "keep a close eye on" functions as an idiomatic expression used to advise or instruct someone to carefully observe or monitor something. Ludwig AI confirms its correctness and widespread use, highlighting its role in emphasizing vigilance.
Frequent in
News & Media
60%
Wiki
20%
Formal & Business
10%
Less common in
Science
5%
Encyclopedias
3%
Reference
2%
Ludwig's WRAP-UP
The phrase "keep a close eye on" is a very common and correct idiomatic expression that advises vigilance and careful observation. Ludwig AI confirms its appropriateness for various contexts, although more formal alternatives might be preferable in academic or professional settings. Its prevalence in news, media and wiki sources underscores its general usage, while related phrases such as ""closely monitor"" or ""carefully watch"" can provide suitable variations. Remember to consider the context and audience when choosing between "keep a close eye on" and its alternatives to ensure the most effective communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
closely monitor
This phrase emphasizes continuous and careful observation.
carefully watch
This highlights the attentiveness required in observing something.
pay close attention to
This phrase stresses the importance of focusing on something.
keep under surveillance
This implies a more formal or secretive type of monitoring.
maintain vigilance over
This suggests a sustained and alert watchfulness.
keep tabs on
This is a more informal way of saying to monitor something.
be on the lookout for
This focuses on watching for something specific to appear or happen.
supervise closely
This implies a role of oversight and control.
scrutinize carefully
This emphasizes detailed and critical examination.
observe meticulously
This highlights the precision and thoroughness of the observation.
FAQs
How can I use "keep a close eye on" in a sentence?
You can use "keep a close eye on" to indicate the need for careful monitoring. For example, "We need to "closely monitor" the project's progress" or "Carefully watch the weather forecast before planning the event."
What are some alternatives to "keep a close eye on"?
Alternatives include "closely monitor", "carefully watch", and "pay close attention to". The best choice depends on the specific context and the desired level of formality.
Is "keep a close eye on" appropriate for formal writing?
While "keep a close eye on" is widely understood, more formal alternatives like "closely monitor" or "maintain vigilance over" might be more suitable for academic or professional contexts.
What does it mean to "keep a close eye on" something?
To "keep a close eye on" something means to carefully observe it, paying attention to any changes or developments. It implies a proactive approach to monitoring to prevent potential problems or capitalize on opportunities.
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
78%
Authority and reliability
4.5/5
Expert rating
Real-world application tested