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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 are marked
Grammar usage guide and real-world examplesUSAGE SUMMARY
The sentence "they are marked" is correct and usable in written English.
You can use it when you want to describe something that has been labeled, identified, or distinguished in some way. For example: "The items in this box are marked with unique numbers."
✓ Grammatically correct
News & Media
Science
Encyclopedias
Wiki
Alternative expressions(20)
they are labeled
they are identified
they are designated
they are indicated
they are characterized
they are distinguished
they are appreciable
they are significant
they are substantial
they are considerable
they are crucial
they are noteworthy
they are huge
they are vital
they are fundamental
they are enormous
they are massive
they are big
they are sizable
they're significant
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
Instead, they are marked I.C.R., for "intended contraband recipient".
News & Media
They are marked only on the map, unknown even to the landowners whose properties they abut.
News & Media
They are marked in the text with a shaded background and cute little camera icons.
News & Media
They are marked by an admirable aristocratic dignity, realistic yet idealized.
Encyclopedias
They are marked with dimensions according to a system of mathematical ratio.
Encyclopedias
They are marked as the anti-anxiety medication Xanax, prescription painkillers or packaged in colorful candy wrappers.
News & Media
Capote's feelings about Arvin vary, though they are marked by a consistent sense of his old mentor's fatal "moderation".
News & Media
Typically, they are marked by an attention to the set or space of all examples of a particular kind.
Encyclopedias
The precautionary principle suggests that we should be wary of personal products like fragrances unless they are marked phthalate-free.
News & Media
But items that do not meet European norms will still be allowed onto the market provided they are marked as being substandard or intended for cooking or processing.
News & Media
They are figures who have left madness behind them, and this is why they are marked by such a consistently heartrending, inhuman superficiality.
News & Media
Expert writing Tips
Best practice
In scientific writing, specify the method of marking (e.g. "they are marked with a fluorescent dye") to provide necessary detail.
Common error
Be careful when using this phrase in retail contexts. While "they are marked" usually refers to identification, "they are marked down" specifically refers to price reductions. If you only mean identification, avoid adding the word 'down' to prevent confusion.
Source & Trust
91%
Authority and reliability
4.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they are marked" functions as a passive voice construction. It consists of the third-person plural pronoun "they", the auxiliary verb "are" and the past participle "marked". According to Ludwig AI, this structure is commonly used to shift focus onto the objects receiving the action rather than the person performing it.
Frequent in
Science
42%
News & Media
35%
Encyclopedias
12%
Less common in
Wiki
6%
Professional
3%
Social Media
2%
Ludwig's WRAP-UP
In conclusion, "they are marked" is a versatile and grammatically sound phrase used extensively across high-authority sources. Ludwig AI shows that it is particularly prevalent in scientific and journalistic writing to denote classification, physical labeling or symbolic status. Whether describing biological samples marked by proteins or retail items marked for clearance, the phrase provides a clear and objective way to indicate that a subject has been identified. For writers seeking more specific nuances, alternatives like "they are labeled" or "they are flagged" can be used depending on the desired level of emphasis.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
they are labeled
Suggests the attachment of a physical or descriptive tag
they are identified
Focuses on the process of recognition or classification
they are flagged
Implies drawing specific attention to items for review or alert
they are designated
More formal, suggesting an official assignment of status
they are tagged
Common in digital or informal contexts for categorization
they are indicated
Suggests pointing out or showing something clearly
they are characterized
Focuses on inherent traits rather than external labels
they are distinguished
Emphasizes the features that set them apart from others
they are highlighted
Focuses on visual emphasis or increased prominence
they are noted
Suggests they have been observed or mentioned in a specific way
FAQs
How to use "they are marked" in a sentence?
You can use it to describe identification, such as: "The samples are ready once "they are marked" with the appropriate serial numbers."
What can I say instead of "they are marked"?
Depending on the context, you can use "they are labeled", "they are identified" or "they are flagged".
Is it better to use "they are marked" or "they're marked"?
Use "they are marked" for formal writing, academic papers and technical reports. Use the contraction "they're marked" for informal speech or casual writing.
What's the difference between "they are marked" and "they are noted"?
""they are marked"" usually implies a physical or digital signifier has been applied, while "they are noted" simply means they have been observed or recorded.
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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
91%
Authority and reliability
4.8/5
Expert rating
Real-world application tested