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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 been undergoing
Grammar usage guide and real-world examplesUSAGE SUMMARY
'had been undergoing' is correct and usable in written English.
You can use it to refer to an ongoing event that started in the past. For example: "The patient had been undergoing treatment for three months before he began to show signs of improvement."
✓ Grammatically correct
News & Media
Science
Alternative expressions(19)
had been experiencing
had been receiving
had undergone
had been involved in
had been subject to
was undergoing
had commenced
had been attending
had been assisting
had been making
had been pursuing
had been sustaining
had been going
had been soaring
had been crying
had been waiting
had been spying
had been bicycling
had been enjoying
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
He had been undergoing treatment for pneumonia.
News & Media
The cathedral had been undergoing an extensive restoration.
News & Media
The 850-year-old gothic masterpiece had been undergoing restoration.
News & Media
He had been undergoing treatment for cancer for some time.
News & Media
Carter had been undergoing regular checkups for the disease.
News & Media
He had been undergoing intense therapy for the past year.
News & Media
Mr. Cooper, who had been undergoing treatment for depression, left no note, Sergeant Kubler said.
News & Media
A recovering heroin addict, Mr. Pizzuto had been undergoing methadone treatment for at least six years.
News & Media
Jon Swedberg, one of the spokesmen, said Mr. Nixon had been undergoing hospital treatment for pneumonia.
News & Media
He was 52 and had been undergoing treatment at the hospital since January.
News & Media
It is unclear at present what caused the fire, though the cathedral had been undergoing renovations.
News & Media
Expert writing Tips
Best practice
Use "had been undergoing" to describe a process that started in the past, continued for a period of time, and may or may not be ongoing at the present moment. This construction emphasizes the duration of the activity.
Common error
Avoid using "had been undergoing" when a simpler past tense or past progressive tense would suffice. For example, if the process is completed and its duration is not relevant, "underwent" might be more appropriate.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "had been undergoing" functions as the past perfect progressive tense of the verb 'undergo'. It describes an action or process that was in progress for a period of time before another point in the past. As Ludwig AI indicates, it's a grammatically correct and usable phrase.
Frequent in
News & Media
53%
Science
38%
Formal & Business
6%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "had been undergoing" is a grammatically sound and frequently used phrase that describes an action in progress for a duration of time leading up to a point in the past. As Ludwig AI confirms, it's correct and widely applicable. It's commonly found in News & Media and Scientific contexts. When writing, remember to use it when emphasizing the duration of a process is important, and consider alternatives like "had been experiencing" or "had been going through" for nuanced meanings. Be mindful of using simpler past tenses when the ongoing nature of the action isn't significant.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
had been experiencing
Emphasizes the sensation or feeling of going through something.
had been going through
Suggests a more challenging or difficult experience.
had been receiving
Focuses on the act of getting or being given something, such as treatment.
had been participating in
Highlights active involvement in a process or activity.
had been involved in
Indicates a connection or engagement with a particular situation or event.
had been subject to
Implies that someone or something was made to experience something, often negative.
had been in the process of
Formal way of expressing that something was in progress.
was undergoing
Omits "had been" for a shorter, less emphatic version, losing perfective aspect.
had started undergoing
Highlights the start of a process, rather than its duration.
had commenced
Focuses on the beginning of a process, often in formal contexts.
FAQs
How is "had been undergoing" used in a sentence?
"Had been undergoing" indicates a continuous action that started in the past and continued for some time. For example: "The building "had been undergoing" renovations for six months."
What are some alternatives to "had been undergoing"?
Depending on the context, you could use phrases like "had been experiencing", "had been going through", or "had been receiving".
Is it correct to say "was undergoing" instead of "had been undergoing"?
"Was undergoing" is grammatically correct, but it doesn't emphasize the duration of the action as much as "had been undergoing" does. The latter implies a longer period of continuous action prior to a specific point in time.
What is the difference between "had been undergoing" and "had undergone"?
"Had been undergoing" describes a continuous process, whereas "had undergone" indicates a completed action. For example, "He "had been undergoing" therapy for a year" means the therapy continued over time. "He "had undergone" surgery" means the surgery was a single, completed event.
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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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested