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
an event happen
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "an event happen" is not correct in English.
It should be "an event happens" or "an event happened" depending on the tense. You can use it when discussing the occurrence of an event, but it needs to be grammatically correct. Example: "When an event happens, it often brings people together to celebrate."
⚠ May contain grammatical issues
News & Media
Science
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
5 human-written examples
"We're meeting to prepare, should an event happen, but we haven't been notified by the Jackson family," Captain Sadecki said.
News & Media
"It had been closed for seven years," announced Jelovac, "but look how easy it is to make an event happen here".
News & Media
"Why did an event happen, why did a character do this — that's where the comprehension and recall of children with A.D.H.D. tends to fall down," she said.
News & Media
Should such an event happen, the containment structures that surround the nuclear reactors would be vulnerable to failing, resulting in a release of radiation similar to what happened in Japan, Criscione noted.
News & Media
Can such an event happen?
Science
Human-verified similar examples from authoritative sources
Similar Expressions
54 human-written examples
But, towards the end, an event happens.
News & Media
Then an event happened that turned everything upside down.
News & Media
We tend to overestimate the probability of an event happening again.
News & Media
Another of our big features, Christopher McDougall's story on the best way to run, is timed to an event happening right now, the New York City Marathon.
News & Media
Just such an event happened on 3 November 2002 in Alaska.
Science & Research
When an event happens, in different S, the form of A is presented diversely.
Expert writing Tips
Best practice
When referring to a past occurrence, use "an event happened". For future or general occurrences, use "an event happens" or consider alternatives like "an event occurs".
Common error
Avoid using the base form of the verb "happen" with singular nouns. Ensure the verb agrees with the subject; use "happens" for singular present tense or "happened" for past tense.
Source & Trust
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "an event happen" is grammatically incorrect. It attempts to describe an occurrence but fails due to incorrect verb conjugation. Ludwig AI identifies that the proper forms are "an event happens" or "an event happened".
Frequent in
News & Media
25%
Science
25%
Formal & Business
0%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "an event happen" is grammatically incorrect and should be avoided. The correct forms are "an event happens" (present tense) or "an event happened" (past tense). As Ludwig AI points out, the phrase fails to adhere to standard English grammar rules. While examples of its use exist across various sources, its incorrectness makes it unsuitable for formal writing. Instead, consider using grammatically sound alternatives such as "an event occurs" or "an event takes place" for a clearer and more professional tone.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
an event occurs
Replaces the verb "happen" with "occurs", offering a more formal tone.
an event takes place
Substitutes "happen" with "takes place", providing a slightly more descriptive alternative.
an event comes to pass
Uses the more literary phrase "comes to pass" instead of "happen".
an incident occurs
Replaces "event" with "incident", focusing on a specific occurrence.
a circumstance arises
Shifts from "event" to "circumstance" and "happen" to "arises", indicating a specific situation.
a situation unfolds
Uses "situation" instead of "event" and "unfolds" in place of "happen", suggesting a gradual revelation.
an episode transpires
Substitutes "event" with "episode" and "happen" with "transpires", adding a sense of unfolding drama.
an action unfolds
Replaces "event" with "action" and "happen" with "unfolds", suggesting a gradual revelation.
an act transpires
Substitutes "event" with "act" and "happen" with "transpires", adding a sense of unfolding drama.
a development arises
Shifts from "event" to "development" and "happen" to "arises", indicating a specific situation.
FAQs
How should I correctly use the phrase "an event happen" in a sentence?
The phrase "an event happen" is grammatically incorrect. The correct forms are "an event happens" for present tense or "an event happened" for past tense. For example, "An event happens unexpectedly" or "An event happened yesterday".
What's a more formal way to say "an event happen"?
A more formal alternative to "an event happen" (which should be "an event happens/happened") is "an event occurs". This phrasing is suitable for academic or professional contexts.
What is the difference between "an event happens" and "an event is happening"?
"An event happens" describes a general or habitual occurrence, while "an event is happening" describes an event that is currently in progress.
Is "an event happen" ever correct?
No, "an event happen" is not grammatically correct in standard English. The verb "happen" needs to agree with the singular subject "event", so it should be "an event happens" or "an event happened" depending on the intended tense.
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
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested