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
they are developed
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "they are developed" is correct and usable in written English.
It can be used to indicate that something has been created, improved, or evolved over time. Example: "The new software features are impressive because they are developed with user feedback in mind."
✓ Grammatically correct
News & Media
Science
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
They are no longer backwaters; they are developed viable alternatives".
News & Media
And when they are developed, they might differ from place to place.
News & Media
He keeps a tight lid on initiatives as they are developed.
News & Media
Mr. Farquhar introduces other topics in his play but abandons them before they are developed.
News & Media
"We will be discussing these proposals with the government as they are developed.
News & Media
Often they are developed with health-care systems or hospitals that are reaching out to a healthier older population.
News & Media
If they are developed and then enabled, they will devise and deliver the solutions we are currently seeking.
News & Media
It takes a careful reading by a seasoned teacher or editor to determine how they are developed.
News & Media
Timor-Leste also hopes that eventually it can secure a bigger share of any revenues from the gas fields, when they are developed.
News & Media
The British task force has proposed that the industrialized nations stimulate research by committing to purchase effective vaccines, when they are developed, for malaria, tuberculosis and H.I.V.
News & Media
Targeted tax credits, paired with a credible commitment by donors to purchase vaccines once they are developed, could increase investment in desperately needed vaccines.
News & Media
Expert writing Tips
Best practice
When using "they are developed", ensure the antecedent of "they" is clear to avoid ambiguity. For instance, instead of "They are developed for residential applications", specify "These units are developed for residential applications".
Common error
Avoid overusing the passive voice with "they are developed" when an active voice would be more direct and engaging. For example, instead of "The features are developed by the team", consider "The team develops the features."
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they are developed" functions primarily as a passive voice construction. It indicates that the subject ('they') undergoes the action of being developed. Ludwig shows this usage is common in describing processes or products.
Frequent in
Science
37%
News & Media
37%
Formal & Business
26%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "they are developed" is a grammatically correct and very common passive voice construction used to describe the process of creation, improvement, or evolution. As Ludwig AI highlights, it is frequently found in both scientific and news contexts, reflecting its broad applicability. While grammatically sound, using active voice alternatives can sometimes enhance clarity and directness. Remember to ensure the antecedent of "they" is clear to avoid ambiguity. Consider alternatives such as "they are created", "they are designed", or "they are produced" to tailor your writing to the specific context.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
they are created
Focuses on the act of creation rather than the process of development.
they are designed
Emphasizes the planning and intention behind their formation.
they are advanced
Highlights the progress and improvement aspect.
they are evolved
Suggests a gradual change and adaptation over time.
they are cultivated
Implies a careful nurturing and growth process.
they are built
Focuses on the construction and assembly aspect.
they are produced
Highlights the manufacturing or output aspect.
they are refined
Emphasizes the process of improvement and purification.
they are generated
Focuses on the origination or production of something.
they are formulated
Implies a careful and systematic creation process.
FAQs
How can I use "they are developed" in a sentence?
Use "they are developed" to describe something that has been created or improved over time. For example, "The guidelines "they are developed" through multilateral coordinating mechanisms" or "New features "they are developed" to enhance user experience."
What are some alternatives to "they are developed"?
Alternatives include phrases like "they are created", "they are designed", or "they are produced", depending on the specific nuance you wish to convey.
Is it better to use active or passive voice with "they are developed"?
While "they are developed" is grammatically correct, using the active voice can sometimes make your writing more direct. For instance, instead of "The vaccines "they are developed" by researchers", you could say "Researchers develop the vaccines."
What's the difference between "they are developed" and "they have been developed"?
"They are developed" typically refers to an ongoing or habitual process, while "they have been developed" suggests a completed action with current relevance. For example, "New technologies "they are developed" continuously", versus "Effective vaccines they have been developed to combat the virus".
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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested