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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 mailed
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "could have mailed" is correct and usable in written English.
It is typically used to express a possibility or hypothetical situation in the past regarding sending something through the mail. Example: "I could have mailed the documents yesterday, but I forgot to do it."
✓ Grammatically correct
News & Media
Alternative expressions(20)
could have extended
could have been transmitted
would have conveyed
could have spent
could have attended
may have forwarded
should have transmitted
could have issued
could have communicated
could have responded
could have relayed
could have got sent
might have dispatched
could have recommended
could have dispatched
could have been done
could have mail
could have sent
could have disseminated
could have passed on
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
4 human-written examples
"Voters here could have mailed in the electoral votes to the Bush campaign several months ago".
News & Media
"They could have mailed it like they mail it to everybody else," Mr. Cuellar said of the form.
News & Media
At one point the movie hints that even the writer of the postcard might have been nonexistent and that Warwick could have mailed it to himself.
News & Media
Lacking spare change, you could have mailed the battered buck to the state when you got home, but the cost of your postage and handling would have made this counterproductive.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
55 human-written examples
He couldn't have done it – he had no motive, it's a miscarriage of justice and the real question is, who possibly could have?" "Mail kimp.
News & Media
A business that needs a letter on Saturday could have it mailed to a home address.
News & Media
He could have then mailed them to the United States but was worried they would melt; instead he passed them to Szabolcs Marka, a Columbia physicist who was in Sweden at the time.
News & Media
A glaring omission, meanwhile, is any evidence placing Ivins in Princeton, New Jersey, on any of the days the envelopes could have been mailed from there.
Science & Research
Their votes to torpedo, water down, eviscerate or erode rights on all issues from abortion to civil rights were so predictable they could have been mailed in.
News & Media
But if Pine didn't think her TA was remotely capable of handling the class, she could have easily mailed everyone via campus email, and then had the TA go to the classroom and wait for anyone who hadn't read their email.
News & Media
Lawyers for the Colorado secretary of state, who was the defendant in the case, said that federal court intervention one week before the election - after early voting had already begun and many absentee voters had mailed their ballots - could throw the election into disarray and suppress voter turnout.
News & Media
Expert writing Tips
Best practice
Use "could have mailed" to indicate a missed opportunity or a past possibility that did not occur. For example, "I "could have mailed" the package yesterday, but I forgot."
Common error
Avoid using "could have mailed" when referring to present possibilities. Instead, use "could mail" to indicate something that is currently possible. For example, it would be incorrect to say "I "could have mailed" it today"; instead, say "I could mail it today".
Source & Trust
96%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "could have mailed" functions as a modal verb phrase expressing a past possibility or unrealized action. It uses the modal verb 'could' to indicate potential and the perfect infinitive 'have mailed' to place the action in the past. Ludwig AI confirms that this structure conveys a hypothetical past action.
Frequent in
News & Media
60%
Wiki
15%
Science
10%
Less common in
Formal & Business
5%
Academia
5%
Reference
5%
Ludwig's WRAP-UP
In summary, the phrase "could have mailed" is a grammatically correct modal verb phrase used to express a past possibility or a missed opportunity related to sending something via mail. Ludwig AI confirms its validity. While the phrase is relatively rare, it commonly appears in news and media contexts. When using this phrase, avoid confusing it with present possibilities and ensure the correct grammatical structure is followed. Consider alternatives like "might have mailed" or "should have mailed" depending on the specific nuance you aim to convey.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
might have mailed
Expresses a slightly weaker possibility than "could have mailed".
may have mailed
Similar to "might have mailed", indicating a possibility.
would have mailed
Indicates a hypothetical action that didn't happen.
should have mailed
Expresses regret or obligation about not mailing something.
was able to mail
Focuses on the ability to perform the action, rather than the possibility.
had the option to mail
Highlights the availability of the mailing choice.
had the opportunity to mail
Similar to 'had the option to mail', but emphasizes timing.
chose not to mail
Indicates a deliberate decision against mailing.
decided to mail
Highlights the decision of mailing.
was supposed to mail
Implies an expectation or instruction to mail something.
FAQs
What does "could have mailed" mean?
"Could have mailed" indicates a past possibility or a missed opportunity to send something through the postal service. It suggests that the action was feasible, but for some reason, it did not happen.
When should I use "could have mailed"?
Use "could have mailed" when you want to express that an action of mailing something was possible in the past, but it didn't occur. For example, "I "should have mailed" it yesterday, but I forgot".
What are some alternatives to "could have mailed"?
Alternatives include "might have sent", "may have dispatched", or "would have shipped". The choice depends on the specific nuance you want to convey.
Is "could of mailed" grammatically correct?
No, "could of mailed" is grammatically incorrect. The correct form is "could have mailed". The confusion arises because "could have" is often contracted to "could've", which sounds similar to "could of".
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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
96%
Authority and reliability
4.5/5
Expert rating
Real-world application tested