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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
could have happened
Grammar usage guide and real-world examplesUSAGE SUMMARY
"could have happened" is correct and usable in written English.
You can use it to refer to things that were possible in the past, but did not in fact happen. For example: "He was late for the meeting, but it could have happened due to traffic."
✓ Grammatically correct
News & Media
Science
Formal & Business
Alternative expressions(20)
could happen
might have occurred
may have transpired
conceivably happened
it is plausible that it occurred
it was within the realm of possibility
might have stopped
could have anticipated
could have occurred
might have implemented
could have materialized
could have generated
might have advanced
could have caught
could have progressed
could have accomplished
might have transpired
could have existed
might have generated
might have anticipated
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
What could have happened?
News & Media
Something worse could have happened".
News & Media
Worse things could have happened.
News & Media
"That could have happened here".
News & Media
"This could have happened anywhere".
News & Media
That could have happened very early on.
News & Media
What could have happened to flight 9525?
News & Media
Was that how it could have happened?
News & Media
"It could have happened to anybody".
News & Media
"It absolutely could have happened here".
News & Media
It could have happened to anyone.
News & Media
Expert writing Tips
Best practice
When using "could have happened", be specific about what event you are referring to. Avoid vague language that could lead to confusion.
Common error
Avoid using "could have happened" when you actually mean "could happen". The former refers to past possibilities, while the latter refers to present or future possibilities.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "could have happened" functions as a modal verb phrase indicating a past possibility or hypothetical scenario. It suggests that an event was possible but did not actually occur. Ludwig provides numerous examples demonstrating its usage in various contexts.
Frequent in
News & Media
67%
Science
17%
Formal & Business
16%
Less common in
Reference
0%
Social Media
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, "could have happened" is a grammatically correct and widely used phrase to express past possibilities or hypothetical scenarios. Ludwig AI confirms its validity and provides numerous examples from diverse sources. The phrase is versatile, fitting into neutral registers and appearing frequently in news, science, and business contexts. Remember to use it to describe past potentialities and avoid confusing it with present or future possibilities. Exploring alternatives like "might have occurred" or "may have transpired" can add nuance to your writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
might have occurred
Replaces "could" with "might", suggesting a slightly lower probability.
may have transpired
Uses more formal vocabulary to indicate something that possibly happened.
conceivably happened
Emphasizes the possibility of the event.
potentially occurred
Focuses on the potential for the event to take place.
it's possible it happened
Adds a degree of separation, expressing the possibility more explicitly.
it is plausible that it occurred
A more formal and detached way of expressing the possibility.
the event was a possibility
Shifts the focus to the event itself as a potential outcome.
it was within the realm of possibility
Highlights that the event was not impossible.
that was a potential outcome
Emphasizes the outcome as one of several possibilities.
there was a chance it happened
Focuses on the chance or likelihood of the event.
FAQs
How can I use "could have happened" in a sentence?
"Could have happened" expresses a past possibility. For example, "The accident "could have happened" to anyone if they weren't careful".
What's a more formal alternative to "could have happened"?
Alternatives like "might have occurred" or "may have transpired" offer a more formal tone than ""could have happened"".
What is the difference between "could have happened" and "could happen"?
"Could have happened" refers to something that was possible in the past but did not occur, while "could happen" refers to something that is possible in the present or future.
Is "could of happened" grammatically correct?
No, "could of happened" is incorrect. The correct form is ""could have happened"", where "have" is part of the auxiliary verb construction.
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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
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested