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
I realised that
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'I realised that' is correct and usable in written English.
It can be used in a variety of situations when one is expressing a realization they have come to. For example: "I realised that I had been running late for the meeting all along."
✓ Grammatically correct
News & Media
Science
Alternative expressions(20)
I understood that
I recognized that
I discovered that
I ascertained that
I became aware that
It dawned on me that
I figured out that
I perceived that
I came to the conclusion that
I gathered that
I learned that
I recognised that
I revealed that
I appreciated that
I acknowledged that
I reassured that
I discover that
I learnt that
I aware that
I realize 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
60 human-written examples
"I realised that table was my ego.
News & Media
I realised that would be impossible.
News & Media
I realised that wasn't true.
News & Media
I realised that was true.
News & Media
'I realised that celebrity wasn't for me.
News & Media
I realised that "auteur cinema" had little place in Britain.
News & Media
I realised that wasn't the right way to behave.
News & Media
"And I realised that could be the only explanation.
News & Media
"I realised that money has no value," he said.
News & Media
I realised that can't save anybody..
News & Media
I realised that these were real people.
News & Media
Expert writing Tips
Best practice
Use "I realised that" to clearly express a change in your understanding or perspective. It adds a personal touch to your writing and emphasizes your cognitive process.
Common error
While effective, excessive use of "I realised that" can make your writing sound repetitive. Vary your sentence structure by using synonyms like "I understood that" or rephrasing to avoid over-reliance on this phrase.
Source & Trust
86%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "I realised that" functions as a declarative clause introducing a statement of understanding or awareness. As shown by Ludwig, it is commonly used to express a personal revelation or insight, providing context for subsequent information.
Frequent in
News & Media
70%
Science
15%
Formal & Business
5%
Less common in
Academia
5%
Encyclopedias
3%
Wiki
2%
Ludwig's WRAP-UP
In summary, the phrase "I realised that" is a grammatically correct and versatile expression used to convey a moment of understanding or awareness. As Ludwig AI confirms, it is suitable for various contexts, particularly in news and media, but can also be found in scientific and business writing. While very common, varying your phrasing and sentence structure ensures clarity and prevents repetition. Remember that while the phrase is acceptable, consider that its excessive use can be less objective in formal writing. Consider alternative phrases such as "I understood that" or "I discovered that".
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
I understood that
Emphasizes comprehension and grasping the meaning of something.
I recognized that
Highlights the acknowledgement or identification of something previously known or not fully understood.
I discovered that
Suggests finding out something new or previously unknown.
I became aware that
Focuses on the gradual process of gaining awareness.
It dawned on me that
Implies a sudden and often surprising realization.
I figured out that
Highlights the process of solving a problem or understanding a complex situation.
I perceived that
Suggests a more intuitive or insightful understanding.
I came to the conclusion that
Emphasizes a reasoned judgment based on evidence.
I ascertained that
Highlights the process of confirming or verifying something.
I gathered that
Suggests inferring information based on available cues.
FAQs
What can I say instead of "I realised that"?
You can use alternatives like "I understood that", "I recognized that", or "I discovered that" depending on the context.
How can I use "I realised that" effectively in a sentence?
Use "I realised that" to introduce a new understanding or insight you've gained, making sure it logically connects to the preceding information. For example: "After reviewing the data, I realised that our initial assumptions were incorrect."
Is it appropriate to use "I realised that" in formal writing?
Yes, but use it sparingly. While acceptable, overuse in formal contexts can sound less objective. Consider using alternatives that emphasize the finding rather than your personal realization. Consider using "I ascertained that" or I recognized that.
What's the difference between "I realised that" and "I thought that"?
"I realised that" indicates a change in understanding or a new awareness, while "I thought that" simply expresses a prior belief or opinion that may or may not have changed. Realisation implies a moment of clarity.
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
86%
Authority and reliability
4.6/5
Expert rating
Real-world application tested