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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
combined by
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "combined by" is not correct in standard written English.
It is typically used incorrectly; the correct phrase would be "combined with" or "combined through." Example: "The two chemicals were combined by heating them together in a controlled environment."
⚠ May contain grammatical issues
Science
News & Media
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
60 human-written examples
The received signals are combined by the STC combiner, then decoded by the polar code decoder.
Both branch outputs are combined by means of a power combiner ZN2PD2-50-S+ ZN2PD2-50-S+ ZN2PD2-50-S+
Moreover, the charges can be combined by summation only (i.e. no fractional combinations).
Two of the units were combined by a previous tenant, he said.
News & Media
Then I took readings for absolutely everything – gas, electric and combined, by price, kilowatts and CO2 emissions.
News & Media
And China, let's not forget, is projected to produce more graduates than the US and Europe combined by 2020".
News & Media
The standard rises to 35.5 m.p.g. for cars and trucks combined by 2016.
News & Media
Data was combined by census block in order to create a clear image.
News & Media
Both scores are combined by a simple maximum aggregation.
In this paper, our methods were combined by GMM likelihood.
These systems' outputs are combined by using ROVER.
Expert writing Tips
Best practice
Prefer "combined with" for standard English usage. It is grammatically correct and widely accepted.
Common error
Avoid using "by" after "combined" unless you are describing the agent performing the combination (e.g. "combined by researchers"). In most other contexts, "with" is the correct preposition.
Source & Trust
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "combined by" functions as a passive construction, where an action (combining) is performed on a subject. Ludwig AI notes this usage is often considered grammatically incorrect in standard English, advising instead for phrases like "combined with".
Frequent in
Science
53%
News & Media
29%
Formal & Business
8%
Less common in
Encyclopedias
0%
Wiki
0%
Social Media
0%
Ludwig's WRAP-UP
The phrase "combined by" is frequently used but generally considered grammatically incorrect in standard English. Ludwig AI indicates that the more appropriate alternative is "combined with". While examples of "combined by" appear in diverse sources, including science and news, its grammatical ambiguity suggests caution in formal writing. The primary issue involves preposition choice, with "with" being the standard preposition unless specifying the agent performing the combination.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
combined with
This is the more grammatically correct and widely accepted alternative.
merged with
Suggests a more complete blending of elements, where individual identities are less distinct.
joined by
Implies a physical or structural connection between elements.
linked by
Highlights a relationship or association that connects the elements.
united through
Emphasizes the unifying force or mechanism that brings elements together.
integrated into
Suggests a seamless incorporation of elements into a larger system or whole.
blended via
Focuses on the process of mixing or combining elements using a specific method.
coupled with
Indicates a close association or interaction between elements, often in a technical or scientific context.
amalgamated through
Suggests a merging of elements, often resulting in a new entity or structure.
synthesized from
Implies the creation of something new by combining different elements or components.
FAQs
What is the correct preposition to use with "combined"?
The correct preposition to use with "combined" is generally "with", as in "combined with". "Combined by" is only appropriate when specifying the agent that performed the combining action.
When is it appropriate to use "combined by"?
"Combined by" is appropriate when you want to specify who or what performed the action of combining. For example, "The data was "combined by researchers"".
What can I use instead of "combined by" in most cases?
In most cases, you can use "combined with" instead of "combined by". This is the grammatically correct and widely accepted alternative.
Is "combined by" grammatically correct?
According to standard English grammar, "combined by" is generally considered incorrect unless specifying the agent performing the combination. The preferred phrase is "combined with".
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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