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
could have tested
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "could have tested" is correct and usable in written English.
It is typically used to express a possibility or hypothetical situation in the past regarding testing something. Example: "If we had more time, we could have tested the new software before the launch."
✓ Grammatically correct
News & Media
Science
Formal & Business
Alternative expressions(20)
could have referred
could have ascertained
could have made
could have achieved
could have progress
might have crafted
should have made
could have acknowledged
could have progressed
should have tested
had the option to generate
would have been able to construct
could have framed
could have practiced
was capable of creating
could have updated
could have strengthened
was in a position to develop
had the ability to produce
could have substantiated
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
26 human-written examples
He could have tested free agency at season's end.
News & Media
Andruw Jones could have tested his value on the open market after next season.
News & Media
We could have tested that proposition if Mitt Romney had won.
News & Media
I could have tested potential dinner party guests to see if they got the reference.
News & Media
"We could have tested it for a year, but it all happened so quickly," Davis Factor said.
News & Media
Penguin could have tested the egregiousness of the 1959 act with any one of many better novels.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
34 human-written examples
With Nima, I could've tested those specific foods before consumption and probably avoided a trip to the ER.
News & Media
Ooh, and imagine what fun your healthcare providers could have testing unproven new medicines on you.
News & Media
Well there have been very few children tested and I have the experience in a family where we were sort of in a sense forced into doing it because a couple of cousins had been tested and you couldn't have the precedent that one branch of the family could have testing in childhood and the other couldn't.
News & Media
We could have tests, like driving tests but more difficult.
News & Media
Even a chicken-wing eater of Judy Katz's seriousness could not have tested the full variety of Buffalo chicken wings.
News & Media
Expert writing Tips
Best practice
Use "could have tested" to indicate a missed opportunity or a hypothetical situation where testing was possible but did not occur. Ensure the context clearly suggests the unrealized potential or past possibility.
Common error
Avoid using "could have tested" when you mean to say something was actually tested. "Could have tested" implies it didn't happen. Use "tested" (past simple) or "has been tested" (present perfect) for actual completed actions.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "could have tested" functions as a modal construction expressing a hypothetical past action or a missed opportunity. It indicates that testing was possible but did not occur, as shown in Ludwig examples.
Frequent in
News & Media
40%
Science
32%
Formal & Business
12%
Less common in
Wiki
4%
Academia
4%
Social Media
0%
Ludwig's WRAP-UP
In summary, "could have tested" is a grammatically sound and frequently used phrase to express past possibilities or missed opportunities relating to testing. As confirmed by Ludwig, it is suitable for various contexts, including news, science, and general conversation. While versatile, be mindful not to confuse it with past simple or present perfect tenses to accurately convey intended meaning. Related phrases such as "might have tested" or ""should have tested"" offer similar meanings with slight variations in nuance. The phrase’s common use and clear grammatical function solidify its place in effective communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
might have tested
Suggests a possibility that something was tested, but with less certainty than "could have tested".
should have tested
Implies an obligation or recommendation that something should have been tested, often with a sense of regret.
would have tested
Indicates a conditional situation where testing would have occurred under different circumstances.
were able to test
Focuses on the ability to perform a test, differing from the hypothetical nature of "could have tested".
had the opportunity to test
Highlights the availability of an opportunity for testing, which "could have tested" doesn't explicitly state.
had a chance to test
Similar to "had the opportunity to test", emphasizing the availability of a chance for testing.
were in a position to test
Emphasizes the readiness or state that enabled the testing, diverging from the hypothetical aspect of "could have tested".
were permitted to test
Highlights the permission or authorization to test, which is a different emphasis compared to the possibility in "could have tested".
had the resources to test
Highlights the availability of resources or means for testing, which "could have tested" doesn't explicitly state.
were equipped to test
Emphasizes the preparedness with the tools or equipment required for testing, diverging from the hypothetical aspect of "could have tested".
FAQs
How can I use "could have tested" in a sentence?
You can use "could have tested" to indicate a missed opportunity or a past possibility that did not occur. For example: "They "should have tested" the software before releasing it."
What's the difference between "could have tested" and "should have tested"?
"Could have tested" indicates a past possibility, while ""should have tested"" implies a recommendation or obligation that was not fulfilled. The latter often carries a sense of regret or criticism.
What can I say instead of "could have tested"?
Alternatives include "might have tested", "would have tested", or "had the opportunity to test", depending on the context and the nuance you want to convey.
Is "could have tested" grammatically correct?
Yes, "could have tested" is grammatically correct. It follows the structure of a modal verb (could) + have + past participle (tested) to express a past possibility.
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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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested