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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 were failing
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "which were failing" is correct and usable in written English.
It can be used to describe a situation or condition where something was not functioning properly in the past. Example: "The systems in place, which were failing, needed immediate attention to prevent further issues."
✓ Grammatically correct
News & Media
Science
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
10 human-written examples
The man's kidneys, which were failing at the time of the implant, are functioning normally, Dr. Gray said.
News & Media
Those worries grew in recent days when Iceland seized its three major banks, which were failing, and appeared to guarantee the deposits of Icelanders over those of foreigners.
News & Media
It is also what the governments of Norway and Sweden did with many of their biggest banks — which were failing after financing real-estate booms — and shortly afterward those economies were again growing vigorously.
News & Media
Jack Straw inherited a police service which was detecting fewer crimes, courts which were clogged with delays, fines which were not being collected, community sentences which were not being served and overcrowded prisons which were failing to change the behaviour of prisoners.
News & Media
To guard against personal bias in continuous assessment, student evaluations would need to be summed from the views of several teachers – but university interviewers would quickly see which sets of teachers were over-stating their evaluations, and which were failing to recognise talent.
News & Media
Ministers said they wanted to remove qualifications which were failing to equip students for a job or university, but admitted that the majority of stand-alone BTecs and City and Guilds qualifications were likely to be scrapped, while their most successful modules are absorbed into the new diplomas to be taught from September.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
50 human-written examples
The government had already bailed out Bear Sterns, and it had helped Merrill Lynch, which was failing as well, and they decided not to bail everybody out, so they let Lehman Brothers fail.
Academia
Which are failing, by the way, occasionally catastrophically.
News & Media
There is gloom over the economy, which is failing to create jobs.
News & Media
So we're going to have a much better plan than ObamaCare, which is failing.
News & Media
In New Orleans, he would manage 23 schools directly, 22 of which are failing, as well as oversee 64 charter schools.
News & Media
Expert writing Tips
Best practice
When using "which were failing", ensure the context clearly indicates what is doing the failing and why. Provide enough information for the reader to understand the nature and consequences of the failure.
Common error
Ensure that the antecedent of "which" is clear and unambiguous. Avoid placing "which were failing" too far from the noun it modifies, as this can lead to confusion.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "which were failing" functions as a non-restrictive (or non-defining) relative clause, providing additional, non-essential information about the noun it modifies. As evidenced by Ludwig, it elaborates on the state of something without being crucial to the sentence's core meaning.
Frequent in
News & Media
60%
Science
20%
Academia
10%
Less common in
Formal & Business
5%
Encyclopedias
2%
Wiki
3%
Ludwig's WRAP-UP
In summary, "which were failing" is a grammatically sound phrase used as a relative clause to provide additional context about something not functioning correctly. Ludwig AI indicates that it's most commonly found in news and media, science, and academic writing. While not overly formal, it’s important to ensure the antecedent is clear to avoid ambiguity. Related phrases like "that were malfunctioning" or "that were not working" can offer alternatives depending on the desired tone and emphasis. As noted by Ludwig, the phrase follows standard grammar rules and provides a useful way to add detail to your writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that were malfunctioning
Replaces "failing" with a more technical term, implying a mechanical or systematic problem.
that were not working
A simpler and more direct way of saying "which were failing", suitable for informal contexts.
that were proving unsuccessful
Focuses on the lack of success rather than the process of failing, implying a disappointing outcome.
that were proving inadequate
Highlights the insufficiency of something, suggesting it was not meeting the required standards.
that were in decline
Indicates a gradual deterioration or weakening, implying a longer-term problem.
that were collapsing
Suggests a sudden and dramatic failure, implying a more severe situation.
that were deteriorating
Emphasizes the worsening condition of something, highlighting the process of decay.
that were crumbling
Implies a slow disintegration, often used metaphorically to describe systems or institutions.
that were faltering
Suggests a hesitation or wavering, implying a loss of strength or momentum.
that were deficient
Emphasizes a lack of essential qualities or components, highlighting a fundamental flaw.
FAQs
How can I use "which were failing" in a sentence?
Use "which were failing" to add descriptive detail or provide additional information about something that was not functioning as expected. For example, "The old systems, "which were failing", needed to be replaced."
What's a more formal alternative to "which were failing"?
For a more formal tone, consider using "that were malfunctioning" or "that were proving inadequate". These alternatives convey a similar meaning but may be more appropriate in professional or academic contexts.
Is it always necessary to use "which" before "were failing"?
No, you can sometimes use "that" instead of "which", depending on the sentence structure and the intended emphasis. However, "which" is generally preferred when providing non-essential, additional information.
What is the difference between "which were failing" and "that failed"?
"Which were failing" implies an ongoing process of failure, while "that failed" suggests a completed event. The choice depends on whether you want to emphasize the duration or the result of the failure.
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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
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested