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 understood
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "they understood" is correct and usable in written English. You can use it to indicate that a group of people comprehended something. Example: "After the explanation, they understood the concept clearly." Alternative expressions include "they grasped" and "they comprehended."
✓ Grammatically correct
News & Media
Alternative expressions(20)
they realized
they were aware
they knew
they were cognizant
they were aware of
they were informed
they apprehended
they were mindful
they were conscious
they discovered
they learned
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
58 human-written examples
"They understood".
News & Media
They understood the tension".
News & Media
They understood her.
News & Media
They understood the potential".
News & Media
But they understood.
News & Media
They understood my humour.
News & Media
They understood Kravchuk perfectly".
News & Media
In particular, they understood radio.
News & Media
Both men said they understood.
News & Media
"They understood it.
News & Media
They understood that.
News & Media
Expert writing Tips
Best practice
Use "they understood" when you want to convey that a group of people comprehended a specific concept, situation, or message. Ensure the context clearly defines who "they" refers to and what they understood.
Common error
Avoid using "they understood" without clearly specifying what was understood. Ambiguity can arise if the object of understanding is not explicit in the sentence or surrounding context.
Source & Trust
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they understood" functions as a declarative statement indicating that a group of individuals achieved comprehension of something. Ludwig examples confirm this usage, showing the phrase in contexts where understanding, realization, or awareness is being conveyed.
Frequent in
News & Media
95%
Science
2%
Formal & Business
1%
Less common in
Wiki
1%
Reference
0.5%
Encyclopedias
0.5%
Ludwig's WRAP-UP
In summary, "they understood" is a grammatically correct and frequently used phrase that indicates comprehension by a group of individuals. Ludwig AI confirms its widespread use across various contexts, especially in News & Media. The phrase is generally neutral in register and serves to communicate that a specific understanding has been achieved. When using the phrase, ensure that the subject of understanding is clear to avoid ambiguity. Alternatives like "they comprehended" or "they grasped" can be used to add nuance.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
they comprehended
Emphasizes a thorough understanding, often implying intellectual grasp.
they grasped
Highlights a quick or intuitive understanding of something.
they realized
Focuses on becoming aware or conscious of something, often after a period of unawareness.
they perceived
Implies understanding through sensory input or intuition.
they recognized
Stresses the ability to identify or acknowledge something.
they were aware
Indicates a general knowledge or consciousness of a fact or situation.
they got the message
Suggests understanding a subtle or indirect communication.
they took it in
Indicates that they absorbed and understood information.
they were cognisant
A more formal synonym for 'aware', implying a considered understanding.
it clicked for them
Implies a sudden moment of understanding or realization.
FAQs
How can I use "they understood" in a sentence?
Use "they understood" to indicate that a group of people comprehended something. For example: "After the detailed explanation, "they understood" the complexities of the project".
What are some alternatives to "they understood"?
You can use alternatives such as "they comprehended", "they grasped", or "they realized", depending on the nuance you want to convey.
Is it correct to say "they understanded" instead of "they understood"?
No, "they understanded" is grammatically incorrect. The correct past tense form of "understand" is "understood". Always use ""they understood"".
What's the difference between "they understood" and "they were understanding"?
"They understood" indicates a completed action of comprehension, while "they were understanding" suggests an ongoing process of trying to understand something. For instance, ""they understood" the instructions" means they fully grasped them. "They were understanding the instructions" implies they were in the process of grasping them.
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
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested