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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
they realized that
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "they realized that" is correct and commonly used in written English.
It is often used to introduce a realization or understanding that a subject has had. Here is an example: "They realized that the project would require more time and resources than initially anticipated."
✓ Grammatically correct
News & Media
Science
Encyclopedias
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
But as they gained experience in different countries, they realized that was not the best strategy.
News & Media
But within a few years, they realized that wasn't enough.
News & Media
They realized that they were negligible.
News & Media
Then they realized that he probably hadn't but didn't care.
News & Media
Maybe they realized that you can't win without a quad.
News & Media
"They realized that more than sympathy was required".
News & Media
They didn't dare, and they realized that they didn't dare.
News & Media
"And then they realized that that was not the answer.
News & Media
They realized that they needed their dead buddy's help.
News & Media
And they realized that their lifeguard had become a firefighter.
News & Media
They brightened when they realized that I was a foreigner.
News & Media
Expert writing Tips
Best practice
When using "they realized that", ensure the subsequent clause provides specific details about the realization.
Common error
Avoid shifting tenses inconsistently after "they realized that". Maintain a logical flow by ensuring the tense in the 'that' clause aligns with the context of the realization.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they realized that" functions as a clause introducer, signaling a cognitive shift or new understanding achieved by a group of people. Ludwig AI confirms this is a common and correct construction. The clause following "they realized that" typically provides the content of their realization.
Frequent in
News & Media
47%
Science
20%
Encyclopedias
5%
Less common in
Wiki
5%
Formal & Business
3%
Social Media
0%
Ludwig's WRAP-UP
In summary, the phrase "they realized that" is a grammatically sound and frequently used construction to introduce a new understanding or realization, Ludwig AI confirms it's a common and correct construction. It functions as a clause introducer, commonly found in news media, scientific publications, and encyclopedic entries. While versatile across various registers, its primary aim is to communicate a shift in awareness. Writers should be mindful of maintaining consistent tense agreement after "that". Consider alternatives like "they recognized that" or "they understood that" to add nuance.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
they recognized that
Emphasizes a formal acknowledgement or awareness.
they discovered that
Highlights the act of finding something previously unknown.
they understood that
Focuses on comprehension and grasping the meaning.
they ascertained that
Implies a process of careful investigation leading to a confirmed understanding.
they perceived that
Indicates an intuitive or sensory awareness.
they became aware that
Stresses the gradual process of gaining knowledge.
they figured out that
Suggests a problem-solving approach to understanding.
it dawned on them that
Indicates a sudden realization.
they concluded that
Implies a logical deduction or judgment based on evidence.
they came to the conclusion that
A more emphatic way of saying they came to realize something.
FAQs
How can I use "they realized that" in a sentence?
Use "they realized that" to introduce a clause explaining what a group or multiple people came to understand. For example, "They realized that the project was more complex than they initially thought".
What are some alternatives to "they realized that"?
You can use alternatives like "they recognized that", "they understood that", or "they discovered that" to convey a similar meaning.
Is it correct to say "they realized of that" instead of "they realized that"?
No, the correct phrasing is "they realized that". The preposition "of" is not needed and would be grammatically incorrect in this context.
What's the difference between "they realized that" and "they felt that"?
"They realized that" indicates a moment of understanding or recognition, whereas "they felt that" implies a subjective emotion or opinion. The former is based on comprehension, while the latter is based on sentiment.
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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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested