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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
who can
Grammar usage guide and real-world examplesUSAGE SUMMARY
'who can' is correct and usable in written English.
'Who can' can be used to ask a question. Example: Who can tell me where the nearest store is?.
✓ Grammatically correct
News & Media
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
Who can know?
News & Media
Who can remember?
News & Media
Who can bike faster?
News & Media
And who can argue?
News & Media
Who can help?
News & Media
Who can argue?
News & Media
WHO can prescribe them?
News & Media
Who can register voters?
News & Media
Who can blame them?
News & Media
Who can blame him?
News & Media
Who can do it?
News & Media
Expert writing Tips
Best practice
Use "who can" to directly inquire about a person's ability or permission to perform an action. For example, "Who can help me with this task?" is clear and concise.
Common error
Avoid using "who can" in declarative sentences where a statement of ability or permission is needed. Instead of "I need to find who can do this", use "I need to find someone who can do this".
Source & Trust
91%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "who can" functions primarily as an interrogative pronoun + auxiliary verb construction. It is used to form questions seeking to identify a person or persons capable of performing a specific action. As Ludwig AI confirms, it's a common and acceptable way to initiate questions.
Frequent in
News & Media
100%
Less common in
Science
0%
Formal & Business
0%
Science
0%
Ludwig's WRAP-UP
In summary, "who can" is a grammatically sound and frequently used phrase for initiating questions about ability, permission, or qualification. Ludwig AI confirms its correctness and usability. Predominantly found in news and media sources, it maintains a neutral register suitable for both formal and informal settings. Remember to use it in interrogative contexts and avoid misusing it in declarative statements. Consider alternatives like ""who is able to"" for a more explicit expression of ability.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
who is able to
Replaces "can" with its synonym "is able", emphasizing capability.
who has the ability to
Expands on the concept of ability, making it more explicit.
which person is capable of
Uses "capable of" to denote ability in a more formal tone.
who is permitted to
Focuses on permission rather than ability.
what person can
Replaces the word "who" with "what person" to inquire about ability.
who is qualified to
Highlights the qualifications needed for a specific action.
who is the right person to
Focuses on finding the most suitable person for a task.
who knows how to
Emphasizes knowledge or skill in performing an action.
who among us can
Emphasizes that someone within a specific group has a particular ability.
who is authorized to
Focuses on formal authorization to perform an action.
FAQs
How to use "who can" in a sentence?
"Who can" is typically used to ask a question about a person's ability or permission. For example, "Who can solve this problem?" or "Who can authorize this request?".
What can I say instead of "who can"?
You can use alternatives like "who is able to", "who is permitted to", or "who has the ability to", depending on the context.
Which is correct, "who can" or "who is able to"?
Both "who can" and "who is able to" are grammatically correct and can be used interchangeably in many contexts. "Who can" is more concise, while "who is able to" is more explicit about ability.
What's the difference between "who can" and "who may"?
"Who can" generally refers to the ability or capability to do something, while "who may" refers to permission or possibility. For example, "Who can help?" asks about ability, while "Who may enter?" asks about permission.
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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
91%
Authority and reliability
4.6/5
Expert rating
Real-world application tested