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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
extended by
Grammar usage guide and real-world examplesUSAGE SUMMARY
"extended by" is a correct and usable phrase in written English.
It is typically used when describing something that has been prolonged or expanded. Example sentence: The deadline for the project was extended by two weeks to allow for more time to complete it.
✓ Grammatically correct
News & Media
Science
Academia
Alternative expressions(7)
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
Immunity was extended by legislation in 2008.
News & Media
His sentence was extended by seven years.
News & Media
The program was later extended by Obama.
News & Media
His service has been extended by 15 months.
News & Media
Blank said Reeves's contract would be extended by three years.
News & Media
(The show has already been extended by two weeks).
News & Media
Last summer the embargo was extended by a year.
News & Media
Its range is extended by sensors and software.
News & Media
This concept was further extended by Fritz Graebner.
Encyclopedias
The project was later widely extended by Amenemhet III.
Encyclopedias
His term already has been extended by a year.
News & Media
Expert writing Tips
Best practice
When using "extended by" to describe time, ensure the unit of time is clearly specified (e.g., "The deadline was extended by two weeks").
Common error
Avoid using "extended by" when active voice is more direct and clear. For example, instead of "The project was extended by the team", use "The team extended the project".
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "extended by" functions as a prepositional phrase, typically modifying a verb in the passive voice to indicate the agent or means by which something was lengthened or expanded. As Ludwig AI confirms, it is a valid and common construction in English.
Frequent in
News & Media
37%
Science
35%
Academia
19%
Less common in
Encyclopedias
5%
Wiki
3%
Formal & Business
1%
Ludwig's WRAP-UP
In summary, the phrase "extended by" is a grammatically sound and frequently used construction in English. As Ludwig AI points out, it serves to specify the means or agent by which something is lengthened, expanded, or prolonged. Its prevalence across diverse contexts—including News & Media, Science, and Academia—underscores its versatility and general applicability. While the register is typically neutral, paying attention to voice and context ensures the most effective communication. By avoiding common pitfalls, such as overuse in passive constructions, writers can leverage "extended by" to enhance clarity and precision.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
lengthened by
This is a direct synonym focusing on physical or temporal extension, maintaining a very similar core meaning.
prolonged by
This alternative is very close in meaning, specifically focusing on the lengthening of time or duration. It emphasizes the aspect of time extension.
increased by
This alternative suggests a numerical augmentation or enlargement, focusing on quantitative growth rather than temporal duration or spatial expansion.
supplemented by
This suggests an addition to make something more complete or enhance it, indicating an augmentation rather than simply a lengthening.
augmented by
Similar to 'supplemented by', this indicates an addition or enhancement, focusing on making something greater in size or value.
complemented by
This suggests that something is enhanced by another element that completes or enhances it, often referring to a harmonious combination.
enhanced by
This focuses on improving the quality or desirability of something through addition or modification, emphasizing the betterment aspect.
amplified by
This suggests an increase in intensity or effect, implying a strengthening or magnification.
expanded through
This indicates a growth or increase in scope or size facilitated by a particular means or method.
increased due to
This implies a cause-and-effect relationship where the increase is a direct result of something, shifting the focus to causation.
FAQs
How to use "extended by" in a sentence?
The phrase "extended by" is used to indicate that something has been made longer or larger. For example, "The deadline was extended by a week" or "The property was extended by adding a new room".
What can I say instead of "extended by"?
You can use alternatives like "prolonged by", "supplemented by", or "increased by" depending on the context.
Is it correct to say "extended by means of"?
Yes, "extended by means of" is grammatically correct, but it can often be simplified to just "extended by" for conciseness. For example, "The garden was extended by means of adding a new section" can be shortened to "The garden was extended by adding a new section".
What's the difference between "extended by" and "expanded by"?
"Extended by" typically refers to lengthening in time or physical dimension, while "expanded by" usually refers to an increase in scope, size, or detail. For instance, a contract might be "extended by" six months, while a theory might be "expanded by" new research.
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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