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
he cautioned that
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "he cautioned that" is correct and usable in written English.
You can use it when you want to indicate that someone is warning or advising against something. Example: "He cautioned that the project might face significant delays if the budget was not approved soon."
✓ Grammatically correct
News & Media
Alternative expressions(20)
he warned that
he advised that
he suggested that
he expressed concern that
he highlighted that
he pointed out that
he noted that
he stipulated that
he clarified that
he outlined that
he invited that
he commented that
he considered that
he called that
he reiterated that
he pointed that
he urged that
he referenced that
he noticed that
he complained that
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
57 human-written examples
He cautioned that dangers remain.
News & Media
Still, he cautioned that challenges remained.
News & Media
But he cautioned that vaccine-derived polio virus might still be a problem.
News & Media
But he cautioned that could change as the continent grapples with its financial crisis.
News & Media
He cautioned that old age shouldn't be taken for granted or romanticized.
News & Media
But he cautioned that security will increase around New York.
News & Media
He cautioned that that was "a very preliminary estimate".
News & Media
But he cautioned that it could be slow going.
News & Media
He cautioned that the transfers did not imply misconduct.
News & Media
But he cautioned that the precedent could be harmful.
News & Media
He cautioned that it's essential to harness that growth.
News & Media
Expert writing Tips
Best practice
Use "he cautioned that" to introduce a warning or advice from a specific person, lending authority to the statement. Ensure the context aligns with the level of formality implied by the speaker's role or position.
Common error
Avoid repetitive use of "he cautioned that" by employing synonyms like "he warned", "he advised", or "he suggested" to maintain reader engagement and prevent monotonous writing.
Source & Trust
91%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The primary grammatical function of "he cautioned that" is to introduce a subordinate clause expressing a warning or piece of advice. As Ludwig AI confirms, this usage is correct and widespread.
Frequent in
News & Media
98%
Science
1%
Formal & Business
1%
Less common in
Academia
0%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, the phrase "he cautioned that" is a grammatically sound and frequently used expression, predominantly found in news and media contexts. As Ludwig AI confirms, it is employed to introduce a warning or advice from a speaker, serving to highlight potential risks or encourage careful consideration. While synonyms like "he warned that" or "he advised that" exist, "he cautioned that" maintains a neutral tone suitable for a range of professional and informative settings.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
he warned that
Uses "warned" instead of "cautioned", conveying a stronger sense of potential danger.
he alerted that
Uses "alerted" which means to warn someone of danger or a problem
he advised that
Employs "advised", suggesting a more consultative or suggestive approach.
he expressed concern that
Replaces "cautioned" with a phrase that explicitly states the feeling of concern.
he suggested that
Uses "suggested", indicating a milder form of recommendation or consideration.
he highlighted that
Uses "highlighted" meaning to emphasized something important.
he pointed out that
Replaces "cautioned" with "pointed out", focusing on drawing attention to a particular fact or issue.
he noted that
Substitutes "cautioned" with "noted", implying a more observational remark.
he stipulated that
Uses "stipulated" implying that something was agreed upon.
he clarified that
Replaces "cautioned" with "clarified", meaning to make something more clear or easier to understand.
FAQs
What's a good substitute for "he cautioned that"?
Alternatives include "he warned that", "he advised that", or "he suggested that", each carrying a slightly different nuance of warning or guidance.
How formal is the phrase "he cautioned that"?
The phrase "he cautioned that" is generally considered neutral in formality, suitable for news reports, articles, and professional communications. It's less formal than "he stipulated that" but more formal than "he said to be careful".
Is "he cautioned that" always followed by a negative consequence?
Not always. While "he cautioned that" often introduces a potential risk or problem, it can also precede advice meant to prevent any outcome, whether positive or negative. Context is key to understanding the intended implication.
Can I use "he cautioned of" instead of "he cautioned that"?
While grammatically incorrect, the phrase "he cautioned of" might sometimes be used colloquially; however, using "he cautioned that" is always the more grammatically sound and professionally accepted option.
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
91%
Authority and reliability
4.6/5
Expert rating
Real-world application tested