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
could not realise
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "could not realise" is correct and usable in written English.
It can be used when expressing an inability to understand or become aware of something. Example: "Despite the evidence presented, she could not realise the impact of her actions on others."
✓ Grammatically correct
News & Media
Science
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
3 human-written examples
She could not realise that they belonged to her and were a part of herself.
News & Media
She remembers working on projects with artists like Robert Motherwell, Eduardo Paolozzi and Louise Nevelson, although she was disappointed that she could not realise the latter's tapestry in the grey wool she preferred but was forced by the gallery to do it in lurex instead.
News & Media
"Would you believe that politicians of both parties seem to like the idea of lots of parliamentary seats around the country on which to park their bums and were reluctant to see the disappearance of such comfortable positions?" While he could not realise the abolition of the states, he pushed for a new "cooperative" federalism, also championed by former New South Wales premier Nick Greiner.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
Similarly, Deborah Warner couldn't realise a tantalising Waiting for Godot starring Fiona Shaw and Maggie Smith.
News & Media
"I think you don't choose your parents and you don't choose your nationality, and those bonds are incredibly deep and formative in ways that certainly about my nation I couldn't realise until I left.
News & Media
He said: "As a player I couldn't realise my dream to play [in England]." "But I hope in the future, I have a challenge to be a coach or a manager there".
News & Media
The 41-year-old said: "As a player I couldn't realise my dream to play there [in England]." "But I hope in the future, I have a challenge to be a coach or a manager there".
News & Media
How could they not realise the significance of what happened in Florida?
News & Media
About seven hours later they realised they could not make mainland, so they altered course for an island that could be seen in the distance.
Wiki
Here were rolling, lurching, uncontrollable people, endearing, pathetic or grotesque, depending on your point of view, who could not possibly realise what the woman with the camera was doing.
News & Media
Holmes Place did not realise ThyssenKrupp "couldn't be relied upon to do their job properly", he said.
News & Media
Expert writing Tips
Best practice
When using "could not realise", ensure the context clearly indicates what was not understood or recognized to avoid ambiguity.
Common error
Avoid using "could not realise" when a simpler verb like "see" or "understand" would suffice, especially in informal contexts. Overusing it can make your writing sound overly formal or awkward.
Source & Trust
82%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "could not realise" functions as a negative verb phrase, expressing an inability or failure to understand, perceive, or become fully aware of something. According to Ludwig, this phrase is correct and usable in written English.
Frequent in
News & Media
60%
Science
20%
Wiki
10%
Less common in
Formal & Business
3%
Social Media
3%
Encyclopedias
1%
Ludwig's WRAP-UP
In summary, the phrase "could not realise" serves as a negative verb phrase that conveys an inability to understand or become fully aware of something. Ludwig confirms its grammatical correctness and usability. While not overly common, it appears most frequently in News & Media contexts and offers a neutral tone suitable for diverse writing styles. Understanding its nuances and available alternatives, such as "failed to grasp" or "did not comprehend", can enhance precision and clarity in your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
failed to grasp
Emphasizes a lack of intellectual understanding.
did not comprehend
Highlights a lack of complete understanding.
was unable to perceive
Focuses on a lack of sensory or intuitive awareness.
did not recognize
Focuses on a failure to identify or acknowledge something.
did not appreciate
Suggests a lack of full understanding or recognition of value.
could not fathom
Implies a deep level of incomprehension.
missed the significance of
Highlights a failure to understand the importance of something.
remained unaware of
Emphasizes a continued state of not knowing.
was blind to
Suggests a complete lack of awareness, often metaphorical.
overlooked the fact that
Focuses on a failure to notice or consider a specific detail.
FAQs
How can I use "could not realise" in a sentence?
Use "could not realise" to express an inability to understand or become fully aware of something. For example, "She "could not realise" the danger she was in."
What's a simpler alternative to "could not realise"?
Alternatives include "didn't understand", "didn't recognize", or "failed to see". The best choice depends on the specific context and nuance you want to convey.
What's the difference between "could not realise" and "did not understand"?
"Could not realise" often implies a gradual coming to awareness that never occurred, while "did not understand" simply states a lack of comprehension. Consider the subtle difference in "He "could not realise" the truth" versus "He "did not understand" the truth".
Is "could not realise" formal or informal?
"Could not realise" is relatively neutral and suitable for both formal and informal contexts, though slightly more formal alternatives like "failed to grasp" may be preferable in academic or professional writing.
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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
82%
Authority and reliability
4.1/5
Expert rating
Real-world application tested