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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
keep controlled
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "keep controlled" is not correct in standard written English.
It is not commonly used and may cause confusion. A more appropriate phrase would be "keep under control." Example: "In order to maintain a safe environment, we must keep the situation under control at all times."
⚠ May contain grammatical issues
News & Media
Encyclopedias
Science
Alternative expressions(20)
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
3 human-written examples
"You're expected to keep controlled," Batty told the inquest.
News & Media
New topics and new ways of thinking and talking about topics continually evolve, and, although there are ongoing efforts to keep controlled vocabulary lists as up-to-date as possible, they inevitably lag behind ordinary language usage.
Encyclopedias
That's in large part because pharmaceutical take-back programs are subject to the same rules that are meant to keep controlled substances from reentering the supply chain either legally or illegally: under the federal Controlled Substances Act, the U.S. Drug Enforcement Administration requires controlled substances to be turned in to the proper law enforcement officials.
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
Therefore, they were kept controlled throughout the methodological development.
Science
And keep control.
News & Media
How did Fischer keep control?
News & Media
He must react quickly to keep control.
News & Media
Families understandably want to keep control.
News & Media
Democrats will keep control of the House.
News & Media
Things change, they must keep supremacy, they must keep control.
News & Media
We've got to keep control of this.
News & Media
Expert writing Tips
Best practice
Avoid using "keep controlled" in formal writing. Opt for more standard phrases like "maintain control" or "keep under control" for clarity and grammatical correctness.
Common error
The phrase "keep controlled" often arises from a misunderstanding of verb tenses. Remember that "keep" is the verb, and it should be followed by an object and a description of its state, such as "keep the situation under control" rather than attempting to use "controlled" as a direct object.
Source & Trust
85%
Authority and reliability
2.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "keep controlled" functions as a verb phrase, attempting to describe the act of maintaining something in a regulated state. However, Ludwig AI indicates that it is not standard English and suggests alternatives like "keep under control" or "maintain control".
Frequent in
News & Media
33%
Encyclopedias
33%
Science
34%
Less common in
Formal & Business
0%
Wiki
0%
Academia
0%
Ludwig's WRAP-UP
In summary, the phrase "keep controlled" is generally considered grammatically incorrect in standard English. Ludwig AI suggests using alternatives such as "keep under control" or "maintain control" for improved clarity and accuracy. While there are a few examples where "keep controlled" appears in various sources, its infrequent usage and grammatical issues make it a phrase to avoid in formal writing. Opting for the suggested alternatives will ensure better communication and adherence to standard English conventions. Due to the limited and grammatically questionable usage, it's best to rely on more established phrases to convey the intended meaning of maintaining regulation or control.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
keep under control
Indicates a state where something is prevented from escalating or becoming unmanageable.
keep in check
Indicates preventing something from exceeding acceptable limits.
stay in control
Suggests a continuous state of managing or regulating something.
maintain control
Emphasizes the act of sustaining authority or regulation.
hold control
Similar to "retain control", focusing on keeping authority.
retain control
Focuses on holding onto existing authority or regulation.
preserve control
Implies an effort to protect existing authority or regulation from being lost.
exercise control
Highlights the active application of authority or influence.
keep a handle on
Informal way of saying maintain control, suggesting management of a situation.
keep regulated
Focuses on maintaining a state of regulation.
FAQs
What's a more appropriate phrase than "keep controlled"?
Instead of "keep controlled", consider using "keep under control", "maintain control", or "stay in control" for better clarity and grammatical correctness.
How can I use "maintain control" in a sentence?
You might say, "It's essential to "maintain control" of your finances" or "The pilot struggled to "maintain control" of the aircraft during the storm."
Is "keep controlled" grammatically correct?
No, "keep controlled" is not grammatically correct in standard English. It's better to use phrases like "keep under control" or "maintain control".
What's the difference between "keep controlled" and "keep under control"?
"Keep controlled" is grammatically incorrect and rarely used. "Keep under control" is the correct and commonly used phrase to indicate maintaining regulation or management of 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
85%
Authority and reliability
2.5/5
Expert rating
Real-world application tested