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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
realised not to
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "realised not to" is not correct in standard written English.
It may be intended to express a realization about something that should not be done, but the construction is awkward and unclear. Example: "I realised not to trust him after he lied to me."
⚠ May contain grammatical issues
Science
News & Media
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
1 human-written examples
For DECREASE II only half the CRFs were found and study outcomes were again realised not to have been assessed as described in the publication.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
59 human-written examples
"Some of them here today want to see a difference and it's opening them up and they realise not to do bad things, and hopefully get things out of it".
News & Media
"That was the moment that I realised not everybody was going to get out".
News & Media
They realise not all companies are welcoming to gay and transgender individuals.
News & Media
But now I am older I realise not all fathers were able to do what he did.
News & Media
The other thing I realised was not to wait for the sunshine before heading into the water.
News & Media
Derek is quick to rough him up a little to make him realise he's not to be messed with.
Wiki
"This is about de-stigmatising people, and helping them realise they're not to blame for everything".
News & Media
This is work whose value has not yet been realised and is therefore not to be given away, or given up lightly.
The dyes used were not extracted into the solvent and expected kinetic enhancement was not realised compared to direct gas/water treatment.
She thinks she might have once eaten dog, in China, without realising, but prefers not to dwell on it.
News & Media
Expert writing Tips
Best practice
When aiming for clarity, replace "realised not to" with more precise and grammatically sound alternatives such as "realised that I shouldn't" or "came to understand that I ought not to".
Common error
Avoid using "realised not to" as it is not a standard English construction. This can lead to misinterpretation. Instead, restructure the sentence to clearly express the intended meaning using phrases like "realised that I shouldn't".
Source & Trust
85%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "realised not to" serves to indicate a moment of understanding or awareness, but its unconventional structure makes it grammatically incorrect. Ludwig AI states the phrase is not correct in standard English. Rewording is needed to ensure clarity and correctness.
Frequent in
News & Media
34%
Science
33%
Wiki
8%
Less common in
Formal & Business
8%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "realised not to" is grammatically incorrect and should be avoided in standard English writing. Ludwig AI confirms that it is not a standard construction, and offers alternative, clearer phrasings such as "realised that I shouldn't" or "understood that I ought not to". While examples exist, primarily in news and science contexts, they do not justify its usage. Sticking to grammatically sound alternatives enhances clarity and maintains credibility in both formal and informal communication. Opt for clearer expressions to convey your intended meaning effectively.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
realized that I shouldn't
Replaces with a grammatically correct construction expressing the understanding of an obligation.
understood that I shouldn't
Emphasizes understanding instead of realization, but maintains the negative obligation.
realised not to do it
Adds 'do it' for completion, but still reflects the odd phrasing.
came to understand that I shouldn't
Adds emphasis on the process of understanding, suitable if the realization was gradual.
recognized that I ought not to
A more formal alternative expressing recognition of a duty not to do something.
realised it was a mistake
Focuses on understanding the action was an error.
realised the error of my ways
Puts emphasis on a previous incorrect way of thinking.
knew better than to
Indicates an understanding from experience of what not to do.
realized the danger of
Changes the focus to the understanding of danger.
understood the implications of
Alters the focus to understanding the consequence.
FAQs
What's a more grammatically correct way to say "realised not to"?
Instead of "realised not to", use phrases like "realised that I shouldn't" or "understood that I ought not to" for clarity.
How can I use "realised" correctly to express a negative action?
To express a negative action, rephrase to "realised that I should not do something" or "came to understand that it was not advisable to". Avoid directly following "realised" with "not to".
Is "realised not to" considered formal or informal?
Since "realised not to" is grammatically incorrect, it should be avoided in both formal and informal writing. Use standard English constructions instead.
What's the difference between "realised not to" and "realised I shouldn't"?
"Realised not to" is non-standard. "Realised I shouldn't" is a grammatically correct way of expressing that you understood you should not do something.
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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
85%
Authority and reliability
2.8/5
Expert rating
Real-world application tested