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
use caution when
Grammar usage guide and real-world examplesUSAGE SUMMARY
"use caution when" is a correct and usable phrase in written English.
It is typically used when giving a warning or precaution before a particular action or situation. For example: Use caution when handling hot objects to avoid burns. Use caution when driving in heavy rain to prevent accidents. Use caution when using electrical appliances near water for safety. In each of these examples, "use caution when" is used to advise someone to be careful or take extra care in a specific situation. It can also be used as a standalone sentence, such as "Use caution when crossing the street."
✓ Grammatically correct
Wiki
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
Use caution when tanning.
Wiki
Use caution when downloading.
Wiki
Use caution when sewing.
Wiki
Use caution when starting.
Wiki
Use caution when riding downhill.
Wiki
Use caution when mixing fish!
Wiki
Use caution when around exhaust.
Wiki
Use caution when they're buying.
Wiki
Use caution when using pickaxe.
Wiki
Use caution when using bleach.
Wiki
Use caution when preparing food.
Wiki
Expert writing Tips
Best practice
Use this phrase specifically for tasks that involve a moderate level of risk; for extreme dangers, consider more urgent language like "Danger:" or "Warning:".
Common error
Avoid using "use caution when" without specifying the exact moment of risk. For example, saying "use caution when driving" is less effective than "use caution when driving on icy roads". Specificity increases the practical utility of the warning.
Source & Trust
60%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
"Use caution when" serves as a direct imperative instruction, typically found at the beginning of a safety warning or practical tip. Ludwig AI confirms its status as a correct and usable phrase in written English. It functions as a conditional imperative where the command to be careful is activated by the subsequent situation or activity mentioned after the temporal conjunction "when".
Frequent in
Wiki
92%
News & Media
5%
Formal & Business
3%
Less common in
Science
1%
Academia
1%
Social Media
1%
Ludwig's WRAP-UP
The phrase "use caution when" is a highly reliable and grammatically correct tool for providing safety instructions. Ludwig AI and the extensive examples from WikiHow demonstrate its utility in practical, step-by-step guides. It effectively prepares a reader for a potentially hazardous task without sounding overly alarmist. To maximize its impact, writers should ensure that the action following the phrase is specific and well-defined. While it is dominant in the 'Wiki' category, it is equally applicable in business and news registers. For those seeking a higher level of formality, alternatives like "exercise caution when" serve as excellent substitutes that maintain the same semantic meaning while elevating the professional tone.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
exercise caution when
Significantly more formal and suitable for professional or legal documents.
be careful when
More common in everyday speech and informal writing.
proceed with caution when
Implies that an action is already in progress and requires ongoing vigilance.
take care when
A softer, more British or colloquial way to suggest safety.
use care when
Focuses on the quality of the action rather than just the state of caution.
be cautious when
Uses the adjective form to emphasize the required state of mind.
pay attention when
Focuses on mindfulness and focus rather than general safety.
stay alert when
Suggests a higher level of immediate environmental awareness is needed.
mind your safety when
Directly references the goal of the caution (personal safety).
watch out when
A more urgent and informal warning often used for physical dangers.
FAQs
How to use "use caution when" in a sentence?
You can use "use caution when" to introduce a safety tip, such as: ""Use caution when" operating heavy machinery to prevent workplace injuries."
What can I say instead of "use caution when"?
Depending on the tone you need, you can use "exercise caution when" for formal contexts or "be careful when" for more casual writing.
Is "use caution when" formal enough for a technical manual?
Yes, it is standard for technical manuals, though you might prefer "proceed with caution when" if you want to emphasize the process of the action.
What is the difference between "use caution when" and "take care when"?
While both advise safety, "take care when" is often perceived as more gentle or conversational, whereas "use caution when" sounds more like a structured instruction.
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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
60%
Authority and reliability
4.5/5
Expert rating
Real-world application tested