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
it contained on
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "it contained on" is not correct in written English.
It is not usable as it does not convey a clear meaning and is grammatically incorrect. Example: "The report contained on various topics related to climate change." (This is incorrect; it should be "The report contained various topics related to climate change.")
⚠ May contain grammatical issues
News & Media
Science
Wiki
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
1 human-written examples
One crew spent the night near the fire site, and officials said firefighters expect to have it contained on Sunday.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
Known as "the Flying Testbed", it contains on-board sensors and robotics to identify and avoid hazards.
News & Media
It contains, on average, fourteen thousand inmates, eight thousand officers, two boats, eleven kitchens, and one good school for boys.
News & Media
The working, 'ad hoc' definition of biobanks becomes the de facto 'standard definition' of a biobank and the bio-objects it contains on the BBMRI-ERIC platform.
It contains, on an individual level, administrative data on patients and on hospital visits or hospitalisation from both private and public caregivers.
Science
Particularly, it could be of interest to add data from the Ensembl Bacteria database (63) as it contains, on average, more strains per species.
All of it is contained on one of the library's pages – and the fact that one can find anything one looks for only makes it more frustrating.
News & Media
Before the story appeared, the campaign could have made sure it contained an on-the-record statement from Cain explicitly denying that he had ever sexually harassed anybody.
News & Media
Another problem with the questionnaire was that it contained only one question on nutrition.
Science
That information and the figures used to calculate it are contained on the annual Notice of Assessment.
News & Media
It contained instructions on how to field questions from reporters in the event that iX collapsed.
News & Media
Expert writing Tips
Best practice
Avoid using the phrase "it contained on". Opt for clearer alternatives like "it included", "it featured", or rephrase to eliminate the preposition altogether for better readability.
Common error
Ensure that when describing the contents of something, you use correct prepositions. Instead of "it contained on", which is grammatically incorrect, use "it contained" or "it included" to avoid confusion.
Source & Trust
86%
Authority and reliability
1.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "it contained on" is grammatically incorrect and doesn't serve a clear grammatical function. The verb "contained" typically requires a direct object without the unnecessary preposition "on". Ludwig AI highlights this issue.
Frequent in
Science
33%
News & Media
33%
Wiki
33%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "it contained on" is grammatically incorrect and should be avoided in writing. Ludwig AI confirms this with its analysis. The intended meaning, to describe the contents of something, is lost due to the improper use of the preposition "on". Alternatives such as "it included", "it featured", or "it comprised" offer clearer and more grammatically sound ways to express inclusion. It is advisable to revise any instance of "it contained on" to ensure clarity and correctness.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
it included
Replaces "contained on" with a simpler and more direct term for inclusion.
it featured
Similar to "included", but suggests a more prominent or emphasized presence of the item.
it comprised
Indicates that the subject is made up of specific elements.
it held
Emphasizes the subject's capacity to keep or maintain something within.
it incorporated
Suggests a more integrated inclusion, where the elements are part of a unified whole.
it consisted of
Focuses on the components that make up the subject.
it was based on
Shifts the focus to the foundation or source of the subject.
it relied on
Indicates that the subject depends on specific elements for its function or existence.
it depended on
Similar to "relied on", emphasizing dependence.
it centered on
Highlights the main topic or focus of the subject.
FAQs
How can I correctly use "contained" in a sentence?
Use "contained" followed directly by the contents or with a preposition other than "on", like "The box contained books and toys" or "the information contained within the document".
What are some alternatives to "it contained"?
You can use phrases like "it included", "it featured", or "it comprised" depending on the specific context.
Is "it contained on" grammatically correct?
No, "it contained on" is grammatically incorrect. The correct phrasing would be "it contained" or restructuring the sentence to avoid the error.
What is the difference between "it contained" and "it was contained on"?
"It contained" means something actively included something else. "It was contained on" is not a standard or grammatically correct construction; rephrase using "it was included on" (if appropriate) or use "it contained".
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
86%
Authority and reliability
1.8/5
Expert rating
Real-world application tested