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 be unavailable
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "could be unavailable" is correct and usable in written English.
It can be used to indicate the possibility that something may not be accessible or present at a given time. Example: "Due to maintenance, the website could be unavailable for several hours."
✓ Grammatically correct
News & Media
Science
Formal & Business
Alternative expressions(14)
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
10 human-written examples
Electricity could be unavailable for weeks.
News & Media
Grant will face selection problems for the final on 15 May, as a host of his players could be unavailable because of performance-related contractual issues.
News & Media
The cloak of secrecy fueled speculation that Manning could be unavailable -- or at least not as good as usual -- when the season starts and that the Colts could slip out of the league's upper echelon.
News & Media
Somerset have qualified, along with Leicestershire, for next month's Champions League T20 in India but are threatened by the fact that four of their leading players could be unavailable.
News & Media
Boyle says sorry to fans Motherwell chairman John Boyle has admitted that he is 'hugely embarrassed' at the state of the Fir Park pitch and has revealed their ground could be unavailable for the next three to four weeks as the club attempt to solve their chronic waterlogging problems.
News & Media
But, if he is picked up in the auction this year, and with a reserve price of £160,000 the chances are high, Morgan could be unavailable for the first five matches of this year's County Championship as well as the first home Test of the summer against New Zealand.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
50 human-written examples
It is possible that soluble forms of core and E2 proteins could be found in different compartments to HCV particles and could therefore be unavailable for TLR9-mediated inhibition of IFN-α secretion.
Science
It was further revealed by the England and Wales Cricket Board that Matthew Hoggard, one of 12 players centrally contracted to it, is to undergo tests on a suspected fracture of the left foot and could also be unavailable for selection.
News & Media
Saracens prop Rhys Gill, Bath prop Paul James and centre Gavin Henson, Gloucester scrum-half Tavis Knoyle and Sale hooker Marc Jones could also be unavailable to press claims at the trial.
News & Media
The benefit for us would be that when the crunch time of a crisis came, the visual infrastructure to see precisely what's going on in space, like G.P.S., could be made unavailable to a hostile force.
News & Media
However, CBOE tweeted to warn that its website was running slowly and could be temporarily unavailable.
News & Media
Expert writing Tips
Best practice
Use "could be unavailable" to indicate a possibility rather than a certainty. If the unavailability is confirmed, use "is unavailable" instead.
Common error
While "could be unavailable" is acceptable, overuse in formal contexts can make your writing sound less definitive. Vary your language by using stronger alternatives when certainty exists or when trying to convey authority.
Source & Trust
86%
Authority and reliability
4.3/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "could be unavailable" functions as a modal phrase expressing possibility. It indicates that something has the potential to not be accessible or present. Ludwig AI confirms this phrase is correct and usable. The examples provided demonstrate its role in conveying uncertainty.
Frequent in
News & Media
40%
Science
30%
Formal & Business
10%
Less common in
Encyclopedias
5%
Wiki
5%
Reference
0%
Ludwig's WRAP-UP
In summary, "could be unavailable" is a grammatically sound and commonly used phrase to express the possibility of something not being accessible. Ludwig AI confirms its correctness. Its register is generally neutral, fitting well in news, scientific, and business contexts. While it's a versatile phrase, writers should be mindful of overuse in formal settings and consider stronger alternatives when conveying certainty. Key takeaway: "could be unavailable" is your go-to when you need to flag a potential lack of accessibility without making a definitive statement.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
might not be accessible
Replaces "could be" with "might not be", indicating a slightly lower probability of inaccessibility.
may not be available
Substitutes "could be" with "may not be", offering a more formal tone and similar level of probability.
is potentially inaccessible
Replaces "could be unavailable" with a more formal and descriptive phrase.
is possibly out of reach
Uses a more metaphorical expression to convey the lack of accessibility.
may become unreachable
Focuses on the potential for something to become inaccessible in the future.
is liable to be inaccessible
Expresses the idea of potential inaccessibility using more formal language.
runs the risk of being inaccessible
Introduces the idea of risk associated with potential inaccessibility.
is subject to unavailability
Uses a more technical and formal phrasing to indicate potential lack of availability.
faces potential outage
Employs the term "outage" to specifically refer to a temporary interruption or unavailability.
is at risk of being down
Uses a more informal and direct expression, typically for systems or services.
FAQs
How can I use "could be unavailable" in a sentence?
Use "could be unavailable" to express a possibility of something not being accessible or present at a specific time. For instance, "Due to scheduled maintenance, the website "could be unavailable" for several hours."
What are some alternatives to saying "could be unavailable"?
Alternatives include phrases like "might not be accessible", "may not be available", or "is potentially inaccessible" depending on the desired level of formality and certainty.
Which is more appropriate: "could be unavailable" or "is unavailable"?
"Could be unavailable" suggests a possibility, while "is unavailable" indicates a confirmed state. Use "could be unavailable" when there's a chance something won't be accessible, and "is unavailable" when it's confirmed that it's not.
What's the nuance between "could be unavailable" and "might be unavailable"?
The difference between "could be unavailable" and "might be unavailable" is subtle. Both indicate a possibility, but "could" sometimes suggests a slightly higher likelihood or a broader range of potential reasons for unavailability than "might".
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
86%
Authority and reliability
4.3/5
Expert rating
Real-world application tested