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
develop and maintained
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "develop and maintained" is not correct in written English.
It should be "developed and maintained" to ensure proper verb tense agreement. Example: "The software was developed and maintained by a dedicated team of engineers."
⚠ May contain grammatical issues
Science
News & Media
Formal & Business
Alternative expressions(1)
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
1 human-written examples
Drugs were added after a 4 day period, during which spheroids develop, and maintained for up to 7 days.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
59 human-written examples
"We also wanted to develop and maintain a solid business plan.
News & Media
Immigrants in New York City often develop and maintain commercial ties to their homelands.
News & Media
To accomplish this, I need to develop and maintain a variety of partnerships.
News & Media
To develop and maintain a healthy relationship to food, the ability to define and recognize one's hunger is essential.
News & Media
It spoke to his strengths that he could develop and maintain their sound at the same time.
News & Media
The Greek Cypriot sector continues to develop and maintain an extensive network of modern highways.
Encyclopedias
Use concrete signs of success to develop and maintain the sanction of key stakeholders.
This has greatly limited efforts to develop and maintain operational, repeat forest inventory on the ground.
It takes time to develop and maintain friendships and personal relationships.
Science & Research
We also have a number of tools to help investors develop and maintain diversified investment portfolios.
News & Media
Expert writing Tips
Best practice
When referring to actions in the past, ensure verbs are conjugated correctly and consistently: use "developed and maintained" for past actions. Ensure you are using the correct tense for parallel construction.
Common error
Avoid mixing present and past tenses when describing completed actions. Use "developed and maintained" instead of "develop and maintained" when discussing something that has already been both developed and maintained.
Source & Trust
76%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "develop and maintained" is intended to function as a compound verb phrase, describing actions related to creation and upkeep. However, Ludwig AI points out that it is grammatically incorrect.
Frequent in
Science
36%
News & Media
32%
Formal & Business
16%
Less common in
Encyclopedias
2%
Wiki
2%
Reference
0%
Ludwig's WRAP-UP
The phrase "develop and maintained" is grammatically incorrect and should be replaced with "developed and maintained" when referring to actions completed in the past. Ludwig AI detected that. While the intended meaning is clear—to describe the creation and ongoing support of something—using the correct verb tense is crucial for clear communication. Contexts for this phrase range from Science to News & Media, making proper grammatical usage essential across diverse registers. Remember to use "developed and maintained" to ensure grammatical accuracy and maintain credibility.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
build and sustain
Highlights the construction and long-term support of something.
foster and maintain
Implies encouragement and ongoing support.
design and support
Highlights the initial design phase and ongoing assistance.
cultivate and preserve
Emphasizes nurturing and protecting something over time.
construct and manage
Focuses on the building and operational oversight of something.
establish and preserve
Stresses the initial setup and continued protection of something.
create and uphold
Focuses on initial creation and subsequent maintenance of standards or principles.
evolve and preserve
Suggests a gradual development with emphasis on conservation of desirable traits.
grow and protect
Highlights the gradual development and safeguarding of something.
nurture and safeguard
Emphasizes the caring and protective aspects of development and maintenance.
FAQs
How do I use "develop and maintained" correctly in a sentence?
The correct form is "developed and maintained". For example, "The system was "developed and maintained" by a team of engineers."
Is "develop and maintained" grammatically correct?
No, "develop and maintained" is grammatically incorrect. The correct form is "developed and maintained", using the past participle form of both verbs.
What is the difference between "develop and maintain" and "developed and maintained"?
"Develop and maintain" refers to an ongoing process, while "developed and maintained" refers to a completed action in the past. Use "developed and maintained" to describe a system that has already been created and is being supported.
What can I say instead of "develop and maintained"?
Consider alternatives such as "create and sustain" or "build and manage" depending on the specific context.
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
76%
Authority and reliability
2.8/5
Expert rating
Real-world application tested