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
are sustained by
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "are sustained by" is correct and usable in written English.
You can use it to describe the ongoing support of something. For example: "The efforts of the team are sustained by the continuing encouragement of their supporters."
✓ Grammatically correct
News & Media
Science
Academia
Encyclopedias
Wiki
Alternative expressions(20)
is sustained by
are supported by
are maintained by
are fueled by
are nourished by
are underpinned by
are dependent on
are reliant on
are judged by
are stimulated by
are expected by
are served by
are segregated by
are subdivided by
are arranged by
are enlightened by
are offered by
are distinguished by
are repulsed by
are disgusted 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
60 human-written examples
They are sustained by family and relationships.
News & Media
Entire careers are sustained by repeated association with sexual perversion.
News & Media
Crops are sustained by manure from farm animals.
News & Media
Most of the injuries are sustained by children from 5 to 15 years old.
News & Media
Subsidised theatre supports commercial projects; large venues are sustained by smaller ones.
News & Media
But in the last analysis, people are sustained by believing in something".
News & Media
If serious accusations against an inspector general are sustained by evidence, the president can dismiss him.
News & Media
Our prosperity and way of life are sustained by energy use.
News & Media
IEEE's technical activities are sustained by volunteer members, including many of your faculty colleagues.
Albee makes it clear that many modern marriages are sustained by destructive role-play.
News & Media
Leuschner, F. et al. Rapid monocyte kinetics in acute myocardial infarction are sustained by extramedullary monocytopoiesis.
Science & Research
Expert writing Tips
Best practice
Use "are sustained by" to indicate that something is maintained or supported over time by a particular source or element. For example, "The community's efforts are sustained by the unwavering support of local businesses."
Common error
Avoid using "are sustained by" when you intend to express an active relationship. For instance, instead of "The building are sustained by pillars", consider "Pillars sustain the building" to clarify the active role of the pillars.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "are sustained by" functions as a passive voice construction, indicating that the subject receives support or maintenance from an external source. Ludwig AI shows many examples where this phrase links a result or condition to its enabling factors.
Frequent in
News & Media
35%
Science
30%
Academia
15%
Less common in
Encyclopedias
10%
Wiki
5%
Formal & Business
5%
Ludwig's WRAP-UP
The phrase "are sustained by" is a versatile passive construction frequently employed to convey how something is maintained or supported over time. As confirmed by Ludwig AI, this phrase enjoys widespread use across diverse contexts, including news, science, and academia, underscoring its reliability and applicability. To ensure clarity, avoid using it when an active voice construction would be more appropriate. When seeking alternatives, consider phrases like "are maintained by" or "are supported by" to achieve similar effects. With these considerations in mind, integrating "are sustained by" into your writing can effectively illustrate the dependencies and enabling factors behind various phenomena.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
are maintained by
Focuses on the act of keeping something in its current state through ongoing effort.
are supported by
Emphasizes the provision of assistance or resources that allow something to continue.
are fueled by
Suggests that something is energized or powered by a particular source.
are nourished by
Implies that something is nurtured or fed by a particular element, aiding its growth or continuation.
are underpinned by
Highlights the foundational or underlying support that something relies on.
are kept alive by
Conveys the idea that something is preserved or prevented from failing through specific actions or conditions.
are dependent on
Indicates a reliance on something else for continued existence or function.
are reliant on
Similar to 'dependent on', but emphasizes the act of relying or counting on something.
derive sustenance from
Emphasizes the extraction of necessary elements for survival or continuation.
are propagated by
Highlights the act of something continuing or spreading due to certain influences.
FAQs
How can I use "are sustained by" in a sentence?
Use "are sustained by" to indicate that something is maintained or supported by something else over a period of time. For example, "The project's success "is sustained by" consistent effort and resources".
What are some alternatives to "are sustained by"?
Alternatives include "are supported by", "are maintained by", or "are fueled by", depending on the specific context and nuance you want to convey.
Is it correct to say "is sustained by" instead of "are sustained by"?
The choice between "is" and "are" depends on whether the subject is singular or plural. Use "is sustained by" for singular subjects (e.g., "The effort is sustained by hope"), and "are sustained by" for plural subjects (e.g., "The efforts are sustained by hope").
What's the difference between "are sustained by" and "are caused by"?
"Are sustained by" implies ongoing support or maintenance, while "are caused by" indicates the origin or reason for something's existence. For example, "The ecosystem is sustained by biodiversity", versus "The damage is caused by pollution".
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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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested