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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
I then realised
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "I then realised" is correct and usable in written English.
It can be used when describing a moment of understanding or awareness that occurs after a previous thought or action. Example: "After reviewing the evidence, I then realised that my initial assumptions were incorrect."
✓ Grammatically correct
News & Media
Science
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
20 human-written examples
I then realised that this can be continued as: SENTTTTTTTTTTTTTTTTTTTT.
News & Media
I then realised I was the minister in charge!
News & Media
"I then realised it was a police car.
News & Media
But I then realised I wasn't interested in them or, really, in verse.
News & Media
"I then realised my father was not the man I thought he was," Nikolai recalled.
News & Media
I then realised that there was a blunt economic sense to the word.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
40 human-written examples
I then realise you can push back the sunblinds so they reach right over your head and join the panoramic roof.
News & Media
"I highlighted the text and then realised I could copy it on to a Word document.
News & Media
I froze, but then realised she meant we had to share a compartment, not a bunk.
News & Media
Anyway, I interviewed a lot of interesting people, but then realised I had nothing to say.
News & Media
I keep almost watching it and then realising I just can't.
News & Media
Expert writing Tips
Best practice
Use "I then realised" to clearly indicate a shift in understanding or awareness following a prior event or thought. It helps structure narratives and explain changes in perspective.
Common error
Avoid using "I then realised" when describing intentions or plans formed in the past. Use "decided" or "planned" instead to reflect proactive decisions rather than reactive awareness.
Source & Trust
94%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
Adverbial phrase. "I then realised" functions as an adverbial phrase, modifying the verb by indicating when the realization occurred. As Ludwig AI explains, it is a correct and usable phrase for describing a moment of understanding.
Frequent in
News & Media
75%
Science
15%
Formal & Business
5%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "I then realised" is a common and grammatically sound phrase used to indicate a moment of understanding that follows a previous action or thought. As confirmed by Ludwig AI, this phrase is acceptable in written English and offers a clear way to structure narratives and explain changes in perspective. While versatile, it's best used to describe reactive awareness rather than proactive planning. Alternatives like "I then understood" or "I subsequently realized" can provide subtle variations in meaning, and it's important to maintain spelling consistency (realised vs. realized) based on the intended audience.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
I then understood
Replaces "realised" with "understood", focusing on comprehension rather than sudden awareness.
I subsequently realized
Uses "subsequently" to emphasize that the realization occurred after a certain time or event.
It then dawned on me
Emphasizes a sudden and clear understanding, using a more figurative expression.
I came to the realization that
Formal phrasing that shifts the focus to the process of reaching a realization.
I perceived then that
Uses "perceived" for a more subtle or gradual understanding.
I recognized at that point
Focuses on recognition and a specific point in time.
I discerned then that
Emphasizes insightful discovery or perception.
The truth then struck me
Highlights a forceful and sudden understanding of the truth.
That's when it hit me
Informal expression indicating a sudden realization.
I began to comprehend
Focuses on a gradual process of understanding, rather than a single moment.
FAQs
What can I say instead of "I then realised"?
You can use alternatives like "I then understood", "I subsequently realized", or "it then dawned on me" depending on the nuance you want to convey.
How can I use "I then realised" effectively in a sentence?
Use "I then realised" to connect a previous action or observation to a subsequent understanding. For example, "I reviewed the data, and I then realised the error in my initial calculation."
Is "realised" spelled differently in American English?
Yes, "realised" is the British English spelling. In American English, the preferred spelling is "realized". Both are correct, but choose one and use it consistently.
What's the difference between "I realised" and "I then realised"?
"I realised" simply states a moment of realization. "I then realised" implies that the realization occurred after a preceding event or thought, creating a clearer sequence of events.
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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
94%
Authority and reliability
4.5/5
Expert rating
Real-world application tested