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 are kept
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "they are kept" is a grammatically correct and usable part of a sentence in written English.
It is used to indicate that a certain group of people or objects are being maintained or preserved in a particular state or location. Example: "In the zoo, the lions are kept in a large enclosure to ensure their safety and well-being."
✓ Grammatically correct
News & Media
Science
Formal & Business
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
They are kept busy.
News & Media
They are kept watered.
News & Media
If they are kept out, expect fireworks.
News & Media
Activists say they are kept under surveillance.
News & Media
Thus, they are kept unfainting and awake.
News & Media
It's how well they are kept.
News & Media
They are kept within reasonable limits.
News & Media
I hope they are kept private".
News & Media
But they are kept alive by their perfection.
News & Media
They are kept well away from the public.
News & Media
They are kept thirsty to make their urine richer.
News & Media
Expert writing Tips
Best practice
When using "they are kept", ensure the pronoun "they" clearly refers to a specific noun or group of nouns that has already been introduced in the context. This avoids ambiguity.
Common error
Avoid using "they are kept" without a clear antecedent for "they". This can lead to confusion and make the sentence difficult to understand. Always clarify what "they" refers to.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they are kept" functions as a passive voice construction, indicating that a subject (represented by "they") is receiving the action of being kept in a certain state or place. Ludwig AI confirms this usage across numerous examples.
Frequent in
News & Media
45%
Science
25%
Formal & Business
15%
Less common in
Encyclopedias
5%
Wiki
5%
Reference
5%
Ludwig's WRAP-UP
The phrase "they are kept" is a versatile and commonly used passive construction that describes the condition or location of a subject being maintained, protected, or confined. Ludwig AI analysis, supported by numerous real-world examples, confirms its grammatical correctness and widespread usage across diverse contexts, including news, science, and formal communication. While its register is generally neutral, ensuring a clear antecedent for "they" is crucial for avoiding ambiguity. Alternatives such as "they are maintained" or "they are preserved" can provide subtle nuances depending on the intended meaning. The phrase's high frequency and clear communicative purpose make it a valuable tool in effective writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
they are maintained
Focuses on the ongoing effort to preserve something in a specific condition.
they are preserved
Emphasizes protecting something from damage or decay.
they are safeguarded
Highlights the measures taken to ensure the safety and security of something.
they are retained
Indicates that something is held or not allowed to be lost or removed.
they are held
A more general term suggesting that something is being possessed or contained.
they are stored
Implies a specific location or method for keeping something for future use.
they are controlled
Suggests that something is being managed or regulated to stay within certain limits.
they are restrained
Emphasizes the act of limiting or preventing something from moving or acting freely.
they are sheltered
Highlights the protection afforded from harsh conditions or dangers.
they are conserved
Focuses on careful use to prevent depletion.
FAQs
How can I use "they are kept" in a sentence?
Use "they are kept" to describe the state of being maintained or confined. For example, "The documents "they are kept" in a secure vault."
What are some alternatives to "they are kept"?
You can use phrases like "they are maintained", "they are preserved", or "they are safeguarded" depending on the specific nuance you want to convey.
Is it correct to say "they are keep" instead of "they are kept"?
No, "they are keep" is grammatically incorrect. The correct form is "they are kept", where "kept" is the past participle of the verb "keep".
What's the difference between "they are kept" and "they keep"?
"They are kept" is in the passive voice, indicating that something is done to them. "They keep" is in the active voice, indicating that they are performing the action of keeping.
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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
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested