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
did not failed
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "did not failed" is not correct in English.
The correct form is "did not fail." You can use it when negating the past tense of the verb "fail." Example: "Despite the challenges, the project did not fail."
⚠ May contain grammatical issues
Wiki
Science
News & Media
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
2 human-written examples
Playing as a specialist batsman she bowled a solitary wicketless over in six matches she did not failed to pass five in her first five matches, before scoring an unbeaten 34 in the final match against Tasmania.
Wiki
Analysis of the relative proportions of metastasis in patients exhibiting high expression of the aggressive signature to those that did not, failed to show any statistically significant difference (data not shown).
Science
Human-verified similar examples from authoritative sources
Similar Expressions
54 human-written examples
Gonzaga did not fail.
News & Media
We did not fail.
News & Media
"Neil Kinnock did not fail.
News & Media
The United States did not fail.
News & Media
But it did not fail.
News & Media
The market did not fail.
News & Media
He did not fail Friday.
News & Media
Burgess did not fail, others failed him.
News & Media
These talks did not fail by accident.
News & Media
Expert writing Tips
Best practice
Always use the base form of a verb after the auxiliary verb "did". The correct phrasing is "did not fail".
Common error
Avoid using the past participle form ("failed") after "did not". The auxiliary verb "did" already indicates the past tense, so the main verb should be in its base form ("fail").
Source & Trust
80%
Authority and reliability
1.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "did not failed" functions as a verb phrase attempting to express the negation of a past action. However, it's grammatically incorrect. Ludwig AI points out the correct form is "did not fail."
Frequent in
Science
33%
News & Media
33%
Wiki
33%
Less common in
Formal & Business
0%
Reference
0%
Encyclopedias
0%
Ludwig's WRAP-UP
The phrase "did not failed" is a common grammatical error. As Ludwig AI clearly indicates, the correct form is "did not fail". The mistake stems from using the past participle "failed" after the auxiliary verb "did", which already marks the past tense. While sources containing the error exist, primarily in informal contexts, it is crucial to use the grammatically correct form, "did not fail", in both speech and writing. Correcting this error enhances clarity and credibility.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
did not fail
Corrects the grammatical error by using the base form of the verb after "did not".
did not succeed
Replaces "failed" with a synonym that maintains the intended meaning of not achieving success.
was not unsuccessful
Uses a double negative to express success, subtly shifting the emphasis.
did not come to failure
Rephrases the sentence to focus on the process rather than the outcome.
did not prove a failure
Emphasizes the lack of evidence of failure.
avoided failure
Highlights the action taken to prevent failure.
managed to avoid failure
Emphasizes the effort involved in preventing failure.
was not defeated
Focuses on overcoming challenges rather than simply not failing.
did not collapse
Suggests a more dramatic form of failure, such as a system or structure collapsing.
did not fall through
Implies that a plan or arrangement remained intact.
FAQs
What is the correct way to say "did not failed"?
The correct phrase is "did not fail". The word 'did' already indicates past tense, so the verb should be in its base form.
Can I use "did not failed" in any context?
No, "did not failed" is grammatically incorrect in all contexts. The correct form is "did not fail".
What are some alternatives to "did not fail"?
Depending on the context, you could use phrases like "did not succeed", "was not unsuccessful", or "avoided failure".
How does "did not fail" differ in meaning from "did not attempt"?
"Did not fail" implies that an attempt was made, and it was not unsuccessful, while "did not attempt" means no effort was made at all.
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
80%
Authority and reliability
1.8/5
Expert rating
Real-world application tested