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Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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extended by

Grammar usage guide and real-world examples

USAGE 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

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Immunity was extended by legislation in 2008.

His sentence was extended by seven years.

News & Media

The New Yorker

The program was later extended by Obama.

News & Media

The Guardian

His service has been extended by 15 months.

News & Media

The New York Times

Blank said Reeves's contract would be extended by three years.

(The show has already been extended by two weeks).

News & Media

The New York Times

Last summer the embargo was extended by a year.

News & Media

The Guardian

Its range is extended by sensors and software.

This concept was further extended by Fritz Graebner.

Encyclopedias

Britannica

The project was later widely extended by Amenemhet III.

Encyclopedias

Britannica

His term already has been extended by a year.

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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".

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

84%

Authority and reliability

4.5/5

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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.

Expression frequency: Very common

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:

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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Most frequent sentences: