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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 has caused
Grammar usage guide and real-world examplesUSAGE SUMMARY
"what has caused" is correct and usable in written English.
You can use this phrase whenever you are inquiring about the source of a particular effect or situation. For example: "What has caused the sudden increase in prices this month?".
✓ Grammatically correct
News & Media
Academia
Science
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
What has caused the increase?
News & Media
So what has caused this shift?
News & Media
What has caused the current crisis?
News & Media
What has caused this backlash?
Academia
What has caused that polarization?
Academia
What has caused this crisis?
News & Media
HN: What has caused this?
News & Media
What has caused its decline?
News & Media
What has caused these extraordinary circumstances?
Academia
What has caused this sharp rise?
News & Media
What has caused this dramatic rise?
News & Media
Expert writing Tips
Best practice
To enhance clarity, consider rephrasing the question to specify the type of cause you are seeking (e.g., "What economic factors have caused...?", "What historical events have caused...?").
Common error
Ensure that the question clearly identifies the subject. Avoid using "it" or "this" without clear reference to what "it" or "this" is. For example, instead of "What has caused it?", specify "What has caused the decline in sales?"
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "what has caused" functions as an interrogative phrase used to inquire about the reason, origin, or source of a particular situation, event, or phenomenon. As Ludwig AI explains, it is correct and usable in written English. Examples from Ludwig showcase its application in various contexts.
Frequent in
News & Media
65%
Academia
20%
Science
15%
Less common in
Formal & Business
0%
Wiki
0%
Encyclopedias
0%
Ludwig's WRAP-UP
The phrase "what has caused" is a versatile interrogative used to explore the origins and reasons behind various phenomena. As Ludwig AI confirms, it is grammatically sound and widely used. Its prevalence across news, academic, and scientific contexts highlights its effectiveness in eliciting explanations. When employing this phrase, clarity in the subject of inquiry and specificity in the type of cause sought can greatly enhance understanding. Consider alternatives like "what led to" or "what factors contributed to" for nuanced inquiries. Ensuring clear reference and avoiding vague pronouns are crucial for precise communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
what were the reasons for
Focuses on the reasons behind something, being a more direct alternative.
what led to
Emphasizes the sequence of events culminating in a specific outcome.
what brought about
Highlights the action that directly initiated the event.
what factors contributed to
Identifies multiple influencing elements.
what was the origin of
Seeks the starting point or genesis of something.
what explains
Focuses on providing an explanation or rationale.
what accounts for
Asks for the reasons that justify or explain a phenomenon.
what is the source of
Inquires about the point of origin or derivation.
what were the drivers of
Highlights the propelling forces behind an event.
what is the etiology of
A more formal and technical term, especially used in medical contexts, to ask about the cause of a disease or condition.
FAQs
How can I use "what has caused" in a sentence?
Use "what has caused" to inquire about the reason or origin behind a specific event or situation. For example, "What has caused the increase in unemployment rates?"
What are some alternatives to using "what has caused"?
Alternatives include phrases like "what led to", "what brought about", or "what factors contributed to", each offering a slightly different nuance.
Is it better to use "what has caused" or "what caused"?
"What caused" is simpler and often preferred in informal contexts. "What has caused" can sound slightly more formal and is appropriate when discussing ongoing or recently completed events.
Can "what has caused" be used in formal writing?
Yes, "what has caused" is suitable for formal writing, especially when precision and clarity are important. It effectively introduces an inquiry into the origins of a particular phenomenon.
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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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested