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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
what's the reason
Grammar usage guide and real-world examplesUSAGE SUMMARY
"What's the reason?" is a correct and usable phrase in written English.
You can use it when you want to ask someone why something is happening or why someone has done something. For example, "What's the reason you're not attending the meeting?".
✓ 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
59 human-written examples
"I don't know what's the reason to trade all those kids.
News & Media
How do you know what's the reason customers change their minds?" says Rapoport.
News & Media
Okay, fine, so what's the reason why?
News & Media
It's bloodcurdling, and what's the reason?
News & Media
"They don't say what's the reason, but it's basically protectionism," says Li Chow, Sony Pictures' general manager in China.
News & Media
"If it's a case of suicide, OK, what's the reason the domestic worker goes to commit suicide?" asks Justo.
News & Media
What's the reason for this?
News & Media
What's the reason for that?
News & Media
What's the reason?
News & Media
'What's the reason?' is the real question.
News & Media
"The key question is, what's the reason why you're grouping.
News & Media
Expert writing Tips
Best practice
When using "what's the reason", ensure the context clearly identifies what you are asking about to avoid ambiguity.
Common error
Avoid using "what's the reason" without clearly specifying what you are asking about. For instance, instead of saying "What's the reason?", be specific like "What's the reason for the delay?" to provide clarity.
Source & Trust
85%
Authority and reliability
4.7/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "what's the reason" functions as an interrogative phrase, primarily used to elicit an explanation or justification for an action, event, or situation. As Ludwig AI confirms, it's a common and accepted way to seek understanding.
Frequent in
News & Media
95%
Formal & Business
3%
Science
1%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "what's the reason" is a frequently used and grammatically correct question phrase, as confirmed by Ludwig AI. It serves primarily to inquire about the cause or explanation for something, commonly found in News & Media contexts. While maintaining a generally neutral register, it's essential to ensure clarity in your writing by specifying the subject of your inquiry. For alternative phrasing, consider options like ""what is the cause"" or ""why is that"". By adhering to these guidelines, you can effectively and accurately employ "what's the reason" in your written communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
what is the cause
More formal phrasing, replacing "what's" with "what is" and using "cause" instead of "reason".
what is the explanation
Emphasizes seeking an explanation rather than just a reason.
why is that
A more concise and direct way to ask for the reason.
what's the purpose
Focuses on the intended goal or aim behind something.
what's the rationale
Emphasizes the logical basis or justification.
why did this happen
Focuses on the occurrence of an event.
what prompted this
Highlights the initial trigger or motivation.
what's behind this
Suggests a hidden or underlying reason.
what motivates this
Focuses on the driving force or incentive.
to what is this attributable
A formal way of asking what the cause or origin is.
FAQs
How to use "what's the reason" in a sentence?
You can use "what's the reason" to inquire about the cause or explanation for something. For example, "What's the reason you are late?" or "What's the reason for this decision?"
What can I say instead of "what's the reason"?
You can use alternatives like "what is the cause", "why is that", or "what is the explanation" depending on the context.
Which is correct, "what's the reason" or "what is the reason"?
Both "what's the reason" and "what is the reason" are correct. "What's the reason" is a contraction and is more informal, while "what is the reason" is more formal.
Is "what's the reason why" redundant?
Yes, using "why" after "what's the reason" can be redundant. It's better to simply ask "What's the reason?" or "Why...?"
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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
85%
Authority and reliability
4.7/5
Expert rating
Real-world application tested