Used and loved by millions
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
it fail
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "it fail" is not correct in standard written English.
The correct form would be "it fails" or "it failed," depending on the intended tense. Example: "If the system does not respond, it fails to meet the requirements."
⚠ May contain grammatical issues
News & Media
Encyclopedias
Science
Alternative expressions(6)
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
57 human-written examples
Will it fail in its promises?
News & Media
If not, how does it fail in its efforts?
News & Media
For the failed service, why did it fail?
News & Media
There are doubts about Greece's future in the eurozone should it fail to stick with its agreed austerity programme.
News & Media
Why did it fail?
News & Media
Why then did it fail?
Encyclopedias
More important, must it fail?
News & Media
How can it fail?
News & Media
Will it fail?
News & Media
They would rather see it fail.
News & Media
Here's one: Let it fail.
News & Media
Expert writing Tips
Best practice
Consider the context and choose a more precise and grammatically correct alternative, such as "it does not succeed" or "it is unsuccessful".
Common error
A common error is using the base form of the verb ("fail") with a singular subject ("it"). Always use the correct form of the verb to maintain grammatical accuracy: use "it fails" for present tense and "it failed" for past tense.
Source & Trust
84%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "it fail" is typically used as a verb phrase where the subject is "it" and the verb is "fail". However, it is grammatically incorrect because it lacks the proper conjugation for the singular subject "it". Ludwig AI indicates that the correct form should be "it fails" or "it failed".
Frequent in
News & Media
61%
Encyclopedias
7%
Science
5%
Less common in
Wiki
4%
Formal & Business
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, while the phrase "it fail" appears frequently in various sources, including news and media, it is grammatically incorrect. As Ludwig AI suggests, the correct forms are "it fails" for the present tense and "it failed" for the past tense. Although common, particularly in informal contexts, it is advisable to use grammatically correct alternatives like "it does not succeed" or "it is unsuccessful" in formal writing. Despite its frequent use, maintaining grammatical accuracy enhances clarity and credibility.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
it does not succeed
Replaces "fail" with a more formal synonym, "succeed", in the negative form.
it is unsuccessful
Substitutes "fail" with the adjective "unsuccessful" to describe the outcome.
it doesn't work
Offers a more informal and direct way to express the idea of not functioning correctly.
it falls short
Indicates a deficiency or lack of achievement, offering a nuanced alternative to "fail".
it comes to naught
Presents a more literary and emphatic alternative, suggesting a complete lack of success.
it proves fruitless
Implies that efforts did not yield the desired results, replacing "fail" with "fruitless".
it is ineffective
Focuses on the lack of impact or desired effect, rather than outright failure.
it goes wrong
Describes a deviation from the intended path or outcome, implying an error or malfunction.
it misses the mark
Suggests a lack of precision or accuracy in achieving a goal, providing a figurative alternative.
it malfunctions
Focuses on a breakdown or improper function of a system or device, offering a technical alternative.
FAQs
How to correct the phrase "it fail"?
The phrase "it fail" is grammatically incorrect. Use "it fails" for the present tense or "it failed" for the past tense to ensure correct subject-verb agreement.
What are some alternatives to "it fail"?
Depending on the intended meaning, you can use alternatives such as "it does not succeed", "it is unsuccessful", or "it doesn't work".
When should I use "it fails" instead of "it fail"?
"It fails" should be used in the present tense when referring to a singular subject performing an action that is not successful. "It fail" is not grammatically correct.
What's the difference between "it fails" and "it failed"?
"It fails" is in the present tense, indicating a current or habitual lack of success. "It failed" is in the past tense, indicating that something was unsuccessful at a specific point in the past.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
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
4.1/5
Expert rating
Real-world application tested