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 you explain why
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "Could you explain why" is correct and usable in written English.
You can use it when you are asking someone to clarify the reasons behind a particular statement or action. Example: "Could you explain why you chose that particular method for the project?"
✓ Grammatically correct
News & Media
Science
Alternative expressions(6)
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
Could you explain why you find them so interesting?
News & Media
Could you explain why that's wrong?" Scalia growled, "I am inclined to say, four years and another election later, 'Get over it!' " He waited for the boos and the applause to die down.
News & Media
Could you explain why this might have happened, and what you could have done to enable more students to succeed?" It is precisely this fear, of being cornered after failing too many students, that gets me into trouble when I'm trying to produce term grades -- particularly at the end of the first term, when the students have been slow in getting back into the school mentality.
News & Media
How else could you explain why they kept paying two Asian Australian reporters to get their kit off?
News & Media
How else could you explain why the most distrusted man in British politics is treated so sympathetically by the writer?
News & Media
"I did a script comedy workshop in Norway years ago, for instance, and often I was asked after telling a joke, 'Could you explain why and how that is funny?' " Even so, Mr. Horton added, " 'The Simpsons' and 'Shrek' play everywhere," he said.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
49 human-written examples
If you did not use the decision aid for risk communication-could you explain why?
-Yes -No If NO, could you explain briefly why not …. 2. Did you find the advice helpful?
Science
-Yes -No If NO, could you explain briefly why not …. 2. Was the question asked by the referrer clear?
Science
But on the other side of the metal detector, I said to another screener, 'Could you explain to me why the procedure is now different at this airport, like having to remove a wallet that never set off the metal detector?' And he said, 'No, no.
News & Media
Could you explain what you mean and why the soft stuff became much more important to you than business plans and strategic retreats, etc.? It's back again to fielding the best team.
News & Media
Expert writing Tips
Best practice
Use "Could you explain why" to politely request a detailed explanation, especially when the reason is not immediately obvious.
Common error
Avoid using "Could you explain why" in very informal settings where a simpler "Why?" might suffice. Overly formal language can sound unnatural or even sarcastic in casual conversation.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "Could you explain why" functions primarily as an interrogative request. It's used to solicit a reason or justification for a particular action, decision, or situation. As confirmed by Ludwig, the phrase is correct and usable in written English.
Frequent in
News & Media
33%
Science
33%
Formal & Business
33%
Less common in
Academia
0%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, "Could you explain why" is a grammatically correct and usable interrogative phrase used to politely request an explanation or justification. According to Ludwig, the phrase is useful to ask for clarification. While suitable for various contexts, it is most commonly found in news, media, and scientific domains, indicating its value in professional and formal communication. When writing, remember that being overly formal can sound unnatural in casual situations, so consider context before using this phrase. Furthermore, knowing semantically similar alternatives such as "Can you elaborate on why" or "Would you mind explaining why" enriches your writing and allows for a more nuanced expression. Therefore, while "Could you explain why" is proper, always choose the best fit expression for the task at hand.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
Can you elaborate on why
Replaces "could" with "can", making it slightly less formal but still polite.
Would you mind explaining why
Uses "would you mind" to soften the request, making it more polite.
Why is that
A more direct and concise way to ask for an explanation.
What's the reason for that
Focuses on the reason or cause behind something.
Can you give me the reasons why
Specifically asks for multiple reasons.
How do you explain that
Shifts the focus to the method of explanation.
What's your rationale
Asks for the underlying principles or logic.
What's the explanation for this
More general, suitable when the context is already clear.
Please clarify why
A direct but polite request for clarification.
Why is it so
A more colloquial and less formal way to ask for an explanation.
FAQs
How can I use "Could you explain why" in a sentence?
You can use "Could you explain why" to politely ask for a reason or justification. For example, "Could you explain why you made that decision?"
What are some alternatives to "Could you explain why"?
Alternatives include "can you elaborate on why", "would you mind explaining why", or simply "why is that".
Is it more polite to say "Could you explain why" or "Can you explain why"?
"Could you explain why" is generally considered more polite than "Can you explain why" because "could" is a more formal and indirect request.
What is the difference between "Could you explain why" and "Why"?
"Could you explain why" is a polite request for a detailed explanation, while "Why" is a direct question that may be perceived as less courteous, especially in formal contexts.
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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
4.5/5
Expert rating
Real-world application tested