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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
had persisted for
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "had persisted for" is correct and usable in written English.
It can be used to describe a situation or condition that has continued over a specific period of time in the past. Example: "The drought had persisted for several months, leading to severe water shortages in the region."
✓ Grammatically correct
Science
News & Media
Formal & Business
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
But the problem had persisted for so long that Sheffield wanted to fix it now.
News & Media
He added that, in Lacey's case, results had persisted for nearly six years.
News & Media
It had persisted for weeks and woke her patient up from sleep -- that was unusual.
News & Media
It was inexplicable and the hard evidence, perhaps, why Rodgers had persisted for so long with Mignolet.
News & Media
The first reports of the invasion were made in the Buenos Aires press, although rumours that an invasion was imminent had persisted for much of the preceding day.
News & Media
Administration officials recalled the collective sense of confidence about the election that had persisted for many months, the sense of balloons and confetti waiting to be released.
News & Media
Asked why the story of America responding to Cuban intervention in Angola had persisted for so long, Mr. Davis said: "Life is funny.
News & Media
Pitino, 51, underwent tests at the Cleveland Clinic on Tuesday and Wednesday to determine the cause of urological pain that had persisted for months.
News & Media
Moss said this month that he recently had arthroscopic surgery on his left knee because of an injury that had persisted for three years.
News & Media
Robert Hannigan said the secret service failed to learn from its mistaken treatment of the genius, and archaic attitudes had persisted for decades, stifling the careers of brilliant minds.
News & Media
The nonprofit ETMC Regional Healthcare System, based in Tyler, Tex., closed the Mount Vernon hospital and two others of its then-12 rural hospital affiliates because it could no longer sustain operating losses that had persisted for five years.
News & Media
Expert writing Tips
Best practice
Use "had persisted for" to describe conditions, symptoms, beliefs or practices that have continued for a specific duration in the past, emphasizing their prolonged existence.
Common error
Avoid using "has persisted for" when describing a past event. The correct tense is past perfect ("had persisted") to indicate that the persistence occurred before another point in the past.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "had persisted for" functions as part of a verb phrase, indicating the duration of a state or condition. It specifies how long something continued to exist or occur before a certain point in time. As Ludwig AI confirms, the phrase is grammatically correct and usable.
Frequent in
Science
36%
News & Media
36%
Formal & Business
9%
Less common in
Wiki
6%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "had persisted for" is a grammatically correct and frequently used expression to indicate the duration of a state or condition up to a specific point in the past. As Ludwig AI confirms, the phrase is suitable for use in written English. It's most common in scientific, news, and formal business contexts. When using this phrase, ensure clear context and avoid incorrect tense usage. Alternatives include "had continued for" and "had lasted for". The phrase helps provide critical context regarding the duration of events or conditions, influencing how the reader interprets the information.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
had continued for
Replaces "persisted" with "continued", emphasizing the ongoing nature of the situation.
had lasted for
Substitutes "persisted" with "lasted", focusing on the duration of the event or condition.
had remained for
Uses "remained" instead of "persisted", highlighting the unchanging state over a period.
had endured for
Replaces "persisted" with "endured", suggesting a challenging or difficult situation that lasted.
had carried on for
Emphasizes the uninterrupted continuation of something over time.
had been ongoing for
Uses a more descriptive phrase to indicate something that was happening continuously.
had extended for
Focuses on the length or reach of the duration.
had been sustained for
Highlights the continuous support or maintenance of something over a period.
had stretched for
Suggests the duration was longer than expected or seemed.
had held on for
Implies resilience or resistance to change during the specified duration.
FAQs
How do I use "had persisted for" in a sentence?
Use "had persisted for" to indicate that something continued to exist or occur for a specific duration before a certain point in the past. For example, "The pain "had persisted for" weeks before she sought medical attention".
What are some alternatives to "had persisted for"?
You can use alternatives like "had continued for", "had lasted for", or "had remained for" to express a similar meaning.
Is it correct to say "has persisted for" instead of "had persisted for"?
No, "has persisted for" is generally incorrect when referring to a past event. "Had persisted for" is used to describe something that continued up to a point in the past, while "has persisted for" describes something that continues to the present.
What's the difference between "had persisted for" and "persisted for"?
"Had persisted for" indicates that something continued for a duration leading up to a specific point in the past. "Persisted for" is used when the duration continues to the present. For example, "The symptoms persisted for three weeks" (and may still be present) versus "The symptoms "had persisted for" three weeks before she saw a doctor" (symptoms are no longer present).
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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