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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
are by
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "are by" is correct and usable in written English.
It can be used to indicate the agent or source of an action, often in passive constructions. Example: "The results of the study are by researchers from the university."
✓ Grammatically correct
News & Media
Science
Encyclopedias
Alternative expressions(20)
hinge on
contribute by
diverse depending on
vary according to
alter by
dismiss by
affect depending on
differentiated by
prices are subject to change based on
price is variable and depends on
are caused by
are distinguished by
shift in accordance with
fluctuate by
deviate by
adjusting by
be contingent upon
vary depending on
affect by
the price is affected by
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
59 human-written examples
Tours are by appointment.
News & Media
Bodies are by antibodies.
News & Media
They are, by definition, short.
News & Media
Private tours are by appointment.
News & Media
Some meetings are by chance.
News & Media
The similarities are by design.
News & Media
S.P.E.s are by nature difficult.
News & Media
(Two others are by Giuffre).
News & Media
As we are by them".
News & Media
Most are by ordinary people.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
1 human-written examples
By-elections are by-elections.
News & Media
Expert writing Tips
Best practice
When attributing credit or origin, use "are by" to clearly indicate the creator or source. For example, "The paintings are by Van Gogh".
Common error
Avoid using "are by" when implying possession rather than creation or authorship. For example, don't say "The keys are by John" when you mean "The keys belong to John".
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "are by" functions as a passive construction marker, indicating the agent or source responsible for an action or creation. Ludwig AI shows it is commonly used to attribute authorship or causation. For example, "The novel is by Dickens" or "The problems are caused by neglect".
Frequent in
News & Media
40%
Science
25%
Encyclopedias
15%
Less common in
Formal & Business
5%
Reference
5%
Academia
5%
Ludwig's WRAP-UP
The phrase "are by" is a versatile construction primarily used to attribute creation, authorship, or causation. As Ludwig AI confirms, it is grammatically correct and frequently appears across various contexts, ranging from news media to scientific publications. The neutral register of "are by" makes it suitable for both formal and informal communication. While using "are by", ensure you're indicating the source or agent, not merely possession. Related phrases such as "are created by" or "are designed by" offer nuanced alternatives depending on the specific context. Overall, mastering "are by" enhances clarity and precision in your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
are made by
Highlights the manufacturing or production process carried out by someone.
are created by
Focuses on the act of creation or origination by a specific entity.
are the work of
Indicates authorship or creation, often used in artistic contexts.
are a product of
Highlights that something is the outcome or result of a process or influence.
are designed by
Emphasizes the design aspect and the individual or group responsible for it.
are a consequence of
Similar to 'result from' but emphasizes the result is a direct outcome.
result from
Focuses on the outcome or consequence of an action or event.
are attributed to
Suggests that something is believed to be caused or created by a particular person or thing.
stem from
Implies origination or derivation from a specific source or cause.
are due to
Indicates causation or reason, explaining why something is the case.
FAQs
How can I use "are by" in a sentence?
"Are by" is typically used to indicate authorship, creation, or origin. For instance, "The sculptures are by Michelangelo" or "These errors "are caused by" the new software".
What's the difference between "are by" and "are from"?
"Are by" indicates the creator or author, while "are from" typically indicates origin or source. For example, "The book is by Jane Austen" versus "The wine is "are from France"".
Which is correct, "the drawings are by him" or "the drawings are his"?
"The drawings are by him" indicates he created the drawings. "The drawings are his" indicates possession. The correct usage depends on the intended meaning.
What can I say instead of "the rules are by definition"?
Alternatives include "the rules "are inherently"", "the rules are fundamentally", or "the rules are intrinsically", depending on the specific nuance you want to convey.
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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
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested