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
are unable to
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "are unable to" is correct and usable in written English.
It is used to refer to a lack of the capacity to do something. For example: "Due to the heavy snowfall, the airline crew are unable to take off."
✓ Grammatically correct
News & Media
Science
Academia
Alternative expressions(20)
are not able to
are capable to
fail to
cannot manage to
are impossible to
do not have the wherewithal to
are incapable of
do not have the means to
are unavailable to
are ill-equipped to
are unacceptable to
are possible to
are not in a position to
are insufficient to
are deficient in
are unfit to
are unwilling to
are powerless to
cannot afford to
are unequipped to
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
The children are unable to help financially.
News & Media
Many refuse or are unable to leave.
News & Media
"They are unable to run," he mused.
News & Media
"People are unable to speak publicly.
News & Media
They are unable to find it.
News & Media
We are unable to agree.
Academia
Small particles are unable to cavitate.
Science
We are unable to offer archived concerts.
Academia
Some users are unable to access Canvas.
Academia
Regretably, we are unable to agree.
Academia
We are unable to deliver to P.O.
News & Media
Expert writing Tips
Best practice
When using "are unable to", ensure that the reason for the inability is clear from the context. For example, instead of just saying "They are unable to complete the project", specify "They are unable to complete the project due to lack of funding."
Common error
Avoid using "are unable to" when a simpler phrasing like "cannot" is more concise and effective. While grammatically correct, "are unable to" can sometimes sound unnecessarily formal or wordy.
Source & Trust
87%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "are unable to" functions as a modal verb phrase, expressing a lack of capacity, ability, or possibility. Ludwig AI validates that it is correct. It indicates that the subject is prevented from performing a specific action. Examples show its wide use in stating limitations or restrictions.
Frequent in
News & Media
36%
Science
32%
Academia
20%
Less common in
Formal & Business
7%
Reference
0%
Encyclopedias
0%
Ludwig's WRAP-UP
The phrase "are unable to" is a versatile and grammatically sound construction used to express a lack of capacity or possibility. As confirmed by Ludwig AI, it's suitable for various contexts, ranging from news reports to scientific papers. While "are unable to" finds frequent use in "News & Media", "Science", and "Academia", it is seen less frequently in more informal communications. When writing, remember that while correct, simpler terms such as "cannot" may sometimes offer a more succinct way to express the same idea. By understanding the different nuances and contexts, you will confidently utilize this phrase in your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
cannot
This is a more concise way of expressing inability.
are not able to
This is a more verbose but equally valid alternative.
are incapable of
This phrase emphasizes a lack of inherent ability.
are not in a position to
This phrase suggests circumstantial inability.
are not equipped to
This highlights a lack of necessary resources or skills.
are unequipped to
Similar to "are not equipped to", emphasizing a lack of resources.
are powerless to
This indicates a lack of authority or influence.
are unfit to
This suggests a lack of suitability or qualification.
fail to
This highlights a lack of success in performing an action.
are deficient in
Focuses on a lack of essential qualities or elements.
FAQs
How can I use "are unable to" in a sentence?
You can use "are unable to" to express a lack of capability or possibility. For example: "Due to the storm, rescue teams "are unable to reach" the stranded hikers."
What's the difference between "are unable to" and "cannot"?
While both express inability, "cannot" is generally more direct and less formal. "Are unable to" can be used when a more formal or emphatic tone is desired, as in "We "are unable to offer" a refund in this situation."
What can I say instead of "are unable to"?
Depending on the context, you could use alternatives like "cannot", "are incapable of", or "are not able to". Consider the specific nuance you want to convey when choosing a substitute.
Is it ever incorrect to use "are unable to"?
While grammatically correct, using "are unable to" might be seen as overly formal in casual contexts. Opt for simpler alternatives like "can't" or "cannot" in informal settings. Also, ensure that the subject of the phrase logically aligns with the inability being expressed.
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
87%
Authority and reliability
4.6/5
Expert rating
Real-world application tested