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
they realized
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "they realized" is correct and usable in written English. You can use it when indicating that someone has come to an understanding or awareness of something. Example: "After reviewing the evidence, they realized the mistake in their calculations." Alternative expressions include "they understood," "they became aware," and "they recognized."
✓ Grammatically correct
News & Media
Wiki
Science
Alternative expressions(20)
they understood
they discovered
they learned
they knew
they were aware
they were cognizant
they were aware of
they were informed
they apprehended
they were mindful
they were conscious
comprehended
they captured
they secured
they were conscious of
they have known
they have understood
they have experienced
they have learned
they have noticed
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
They realized it wasn't fake.
News & Media
On second glance, they realized their mistake.
News & Media
They had more talent than they realized.
News & Media
They realized I was genuinely interested".
News & Media
"And they realized I was a fraud".
News & Media
They realized that they were negligible.
News & Media
"They realized I worked fast," Ackroyd says.
News & Media
They realized they are free now".
News & Media
"They realized what they had to do.
News & Media
"They realized it was a stupid mistake".
News & Media
And, they realized, their hearts were, too.
News & Media
Expert writing Tips
Best practice
In formal reports, consider using more precise verbs like "concluded" or "determined" if the awareness was based on formal analysis.
Common error
Writers often use "they realized" when the realization is already implied by the context. If you write 'They looked at the empty safe and realized they had been robbed', you can often omit 'and realized' to make the sentence more punchy: 'They looked at the empty safe; they had been robbed'.
Source & Trust
92%
Authority and reliability
4.9/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they realized" serves as a primary subject-verb clause. It functions as a cognitive reporting verb, typically followed by a direct object or a 'that' clause. According to Ludwig, it is most frequently used to introduce a discovery or a shift in a character's knowledge base.
Frequent in
News & Media
75%
Wiki
15%
Science
10%
Less common in
Formal & Business
5%
Social Media
3%
Encyclopedias
2%
Ludwig's WRAP-UP
In conclusion, "they realized" is a fundamental and highly reliable phrase in the English language. Ludwig AI data demonstrates its dominance in high-quality journalism and narrative writing, where it serves to mark critical shifts in awareness. While it is simple, its clarity makes it indispensable for explaining how a group of people moved from confusion to understanding. Whether used in a news report about a scientific breakthrough or a novel describing a family's epiphany, it remains a robust choice for any writer. Alternatives like "<a href="/s/they+understood" target="_blank" rel="alternative">they understood" or "<a href="/s/they+recognized" target="_blank" rel="alternative">they recognized" can be used to add variety, but the primary phrase is universally effective.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
they understood
Emphasizes the comprehension of a concept or situation rather than just the moment of discovery.
they recognized
Focuses on identifying something previously known or acknowledging a specific truth.
they became aware
More formal and describes a transition into a state of consciousness about a fact.
they discovered
Suggests finding out something that was hidden or unknown through investigation or chance.
they came to the realization
A more verbose and formal version that emphasizes the process of reaching a conclusion.
they grasped
Implies a deeper or more effortful mental reach to understand a complex idea.
they learned
Indicates the acquisition of knowledge or information over time.
it dawned on them
An idiomatic expression that highlights the suddenness or clarity of a new thought.
they noticed
Focuses more on sensory perception or immediate attention to a detail.
they perceived
A more formal term often used in scientific or philosophical contexts for mental or sensory awareness.
FAQs
How do you use "they realized" in a sentence?
You use "they realized" to describe a moment where a group of people gains a new understanding, such as: 'After checking the map, they realized they were on the wrong road'.
What can I say instead of "they realized"?
Depending on the context, you can use alternatives like "<a href="/s/they+understood" target="_blank" rel="alternative">they understood", "<a href="/s/they+recognized" target="_blank" rel="alternative">they recognized" or "<a href="/s/they+discovered" target="_blank" rel="alternative">they discovered".
Is "they realized" grammatically correct?
Yes, it is a standard subject-verb construction in the past tense. Ludwig AI confirms its widespread use in reputable sources like The New York Times and The New Yorker.
What is the difference between "they realized" and "they noticed"?
While "they realized" usually implies a mental epiphany or understanding of a fact, "<a href="/s/they+noticed" target="_blank" rel="alternative">they noticed" typically refers to the physical act of seeing or sensing 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
92%
Authority and reliability
4.9/5
Expert rating
Real-world application tested