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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
which extended for
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "which extended for" is correct and usable in written English.
It can be used to describe the duration or length of something, such as time, distance, or a physical object. Example: "The river, which extended for miles, was a vital source of water for the surrounding communities."
✓ Grammatically correct
News & Media
Encyclopedias
Academia
Alternative expressions(3)
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
8 human-written examples
They doused the tents, which extended for hundreds of yards in every direction, with gasoline and lighted them on fire.
News & Media
Indeed, the bill, which extended for five years programs that offer grants and loans to college students, had arrived on the Senate floor with strong bipartisan support.
News & Media
After a period as wife, mother and volunteer, she began her next professional endeavor as an educator which extended for over 20 years at PS130 in Manhattan.
News & Media
To the southwest of the Aurès a fortified zone completed the frontier defensive system, or limes, which extended for a while as far as Castellum Dimmidi (Messad), the most southerly fort in Roman Algeria yet identified.
Encyclopedias
They point to AstraZeneca, for example, which extended for years its franchise around the huge-selling heartburn pill Prilosec by slightly altering the chemical structure and renaming the medicine Nexium.
News & Media
Finally, there was the existence of the large Soviet bulge, or salient, around Kursk, between Orël and Belgorod, which extended for about 150 miles from north to south and protruded 100 miles into the German lines.
Encyclopedias
Human-verified similar examples from authoritative sources
Similar Expressions
51 human-written examples
"There is a deluge of blood on the street which extends for many metres.
News & Media
Mrs. Castro said the bunkers, which extend for several hundred yards, were "something the public deserves to see".
News & Media
We have u[n-k], which is a unit step going backward in time, but which extends for positive values of n.
Eve Ahlert and Dennis Drake, the screenwriters, have shaken together a canny cocktail of period vernacular and deliberately labored double entendres, some of which extend for entire scenes.
News & Media
The gas industry has argued that vast gas reserves could be found in the Marcellus Shale basin, which extends for roughly 600 miles through Virginia, Ohio, Pennsylvania and New York.
News & Media
Expert writing Tips
Best practice
When using "which extended for", ensure it clearly connects to the noun it modifies, providing specific information about length, duration, or scope. For example, "The agreement, which extended for five years, provided stability to the market."
Common error
Avoid ambiguity by ensuring the "which" clearly refers to a specific noun. Incorrect: "The project included several phases, which extended for many months, causing confusion." Correct: "The project, which extended for many months, included several phases and caused confusion."
Source & Trust
82%
Authority and reliability
4.3/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "which extended for" functions as a relative clause, modifying a noun by providing additional information about its duration, length, or scope. Ludwig AI's analysis of various examples shows it consistently introduces details about the extent of something.
Frequent in
News & Media
32%
Encyclopedias
28%
Academia
20%
Less common in
Science
12%
Wiki
8%
Formal & Business
0%
Ludwig's WRAP-UP
In summary, the phrase "which extended for" is a grammatically sound relative clause used to provide additional descriptive information about a noun's length, duration, or scope. While not exceedingly common, it is considered correct for use in a wide array of contexts, including news, encyclopedias, and academic writing. Ludwig AI’s analysis indicates that this phrase serves to add precision and clarity by specifying the range or duration of what is being described. When using the phrase "which extended for", pay close attention to the clarity and the intended subject of modification in order to avoid ambiguity. Keep in mind, you can also use alternatives depending on the context, such as "that stretched across" or "that spanned over".
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
that stretched across
Focuses on spatial extent, emphasizing a physical reach or coverage.
that spanned over
Highlights the act of covering a specific duration or distance.
that ran through
Suggests a continuous path or duration, implying a start and end point.
that encompassed
Emphasizes the inclusion of something within a specific scope or timeframe.
that reached out to
Focuses on the idea of expansion or influence to a particular point or area.
which covered a period of
Explicitly refers to a duration of time.
that continued for
Implies ongoing action or state over a period of time.
that was prolonged to
Highlights the fact that something was intentionally made longer.
that sustained itself for
Suggests that something maintained itself for some duration
that spread out to
Focuses on the act of physical expansion in multiple directions.
FAQs
How can I use "which extended for" in a sentence?
Use "which extended for" to describe the length, duration, or scope of something in a relative clause. For example, "The hiking trail, which extended for five miles, offered beautiful views."
What are some alternatives to "which extended for"?
You can use alternatives such as "that stretched across", "that spanned over", or "that continued for" depending on the context.
How does "which extended for" differ from "which lasted for"?
"Which extended for" often implies a spatial or temporal dimension, while "which lasted for" typically refers to a duration of time. For example, a road extends, while a meeting lasts.
Is it always necessary to use "which" with "extended for"?
While "which" introduces a nonrestrictive clause providing additional information, you can use "that" for restrictive clauses that are essential to the sentence's meaning. However, "which extended for" is more common in formal writing.
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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
82%
Authority and reliability
4.3/5
Expert rating
Real-world application tested