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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
useful by
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "useful by" is not grammatically correct and is not commonly used in written English.
It is possible that someone could use it in spoken English, but it would not typically be considered correct or standard grammar. Instead, a more appropriate phrase would be "useful for" or "useful in." For example: - "This tool is useful for fixing small electronics." - "The new software is useful in streamlining our work processes." In rare cases, "useful by" could be used to mean that someone or something is of use or benefit to someone else. However, it would be more natural to use active voice and say "useful to" instead. For example: - "His knowledge of technology is useful to his team." - "The donation was useful to the local community center."
⚠ 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
58 human-written examples
Decide whether or not keeping the brush is useful by the end use you're seeking.
Wiki
The system was frequently used in all its parts and considered useful by the bus drivers.
She makes her own assistants useful by picking their brains.
News & Media
What the heck is with all of these ancient players staying useful by hitting threes?
News & Media
"But you feel every day that you're doing something really useful by stopping the CO2 emissions.
News & Media
Can Joe prove he's useful by answering the door when the police turn up?
News & Media
This museum's store sells contemporary objects, both decorative and useful, by artists from around the world.
News & Media
Edsel's getting quite old enough to make himself useful by running small errands.
News & Media
Such changes, common with new leadership in many fields, often prove socially useful by taking advantage of new opportunities.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
2 human-written examples
There are also useful by-products such as a nationally accessible database for researchers.
News & Media
Beyond the production of clean power, the OTEC process also provides several useful by-products.
Encyclopedias
Expert writing Tips
Best practice
When describing the usefulness of something, prefer using "useful for" or "useful to" as they are grammatically correct and widely accepted. For example, instead of "useful by this method", try "useful for this method".
Common error
Avoid using "by" to indicate the purpose or recipient of usefulness. The construction "useful by" is often grammatically incorrect; instead, use "for" or "to" to clarify the relationship. For example, don't say "This tool is useful by students"; say "This tool is useful for students".
Source & Trust
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "useful by" functions as an adjective phrase, but is often grammatically incorrect. As Ludwig AI highlights, constructions like "useful for" or "useful to" are typically more appropriate and grammatically sound. The intended function is to describe something that provides a benefit or serves a purpose.
Frequent in
News & Media
37%
Science
37%
Wiki
5%
Less common in
Encyclopedias
2%
Formal & Business
2%
Reference
0%
Ludwig's WRAP-UP
In summary, while the phrase "useful by" appears frequently across various sources, it's generally considered grammatically incorrect. Ludwig AI recommends using "useful for" or "useful to" as better alternatives. These options provide grammatical accuracy and clarity, avoiding potential misinterpretations. Despite its occurrence in news, scientific articles, and general web content, prioritizing correct grammar enhances the credibility and professionalism of your writing. Always consider the context and choose the most precise and grammatically sound option.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
useful for
Replaces 'by' with 'for', correcting the grammatical structure to indicate purpose or suitability.
useful to
Substitutes 'by' with 'to', indicating benefit or service provided to someone or something.
helpful by
Replace with an alternative adjective but it still has the same grammatical issues of the original phrase.
effective through
Indicates a means or mechanism through which effectiveness is achieved.
beneficial via
Uses 'via' to specify a method or pathway through which benefits are realized.
valuable because of
Highlights the reason or cause that makes something valuable.
advantageous through
Specifies how something becomes advantageous by using 'through'.
practical due to
Shows that practicality stems from a particular reason or condition.
instrumental in
Indicates a key role in achieving a particular outcome.
serviceable via
This alternative shows that something is serviceable through a particular means.
FAQs
What's a grammatically correct alternative to "useful by"?
The phrases "useful for" and "useful to" are generally preferred over "useful by" because they follow standard English grammar rules.
Is "useful by" ever considered correct?
While "useful by" appears in some contexts, it's often considered grammatically incorrect. It's safer to use "useful for" or "useful to" to ensure clarity and correctness.
How can I use "useful for" in a sentence?
You can use "useful for" to indicate the purpose or function of something. For example, "This app is useful for managing your tasks".
What does "useful to" mean?
"Useful to" indicates that something provides a benefit or service to someone or something. For instance, "This information is useful to researchers".
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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
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested