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
doubt as what
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "doubt as what" is not correct and does not make sense in written English.
It seems to be an incomplete or incorrect expression that lacks clarity and proper structure. Example: "I have doubt as to what the next steps should be."
⚠ May contain grammatical issues
Science
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
2 human-written examples
A look some of the comments left by donors on Trussell's page leaves you in no doubt as what donors felt about the MoS story, or why they felt compelled to donate.
News & Media
The rampant use of these reagents for such determination is problematic, to say the least, since it is clear that precipitating minerals bind to serum proteins present in the culture medium, casting doubt as what epitopes exactly, not to mention their species origin, the antibodies are really binding to.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
The purpose of using genetic engineering is to incorporate new traits efficiently and in a way that leaves little doubt as to what has actually been transplanted and what the effects will be.
News & Media
They let you say what you want, and they leave no doubt as to what you mean.
News & Media
While Johnson mentioned Windows 8.1 'Blue,' what he didn't mention is the ever-growing doubt as to what direction Microsoft is going to take Windows 8 in with this update.
News & Media
When in doubt as to what to get, you can always catch them out front and ask what is on their holiday list this year.
News & Media
The concluding scene of tender conjugal eroticism leaves no doubt as to what Ozu thought women want; yet I wonder whether the story doesn't have significant documentary value, for what it suggests of Japanese mores of the time.
News & Media
At least there is much room for doubt as to what counsel actually intended.
Academia
There thus remains no doubt as to what the Rule commands.
Academia
And they were leaving nothing to doubt as to what Cohen was saying took place.
News & Media
Pulvirenti was in no doubt as to what he had seen.
News & Media
Expert writing Tips
Best practice
Avoid using the phrase "doubt as what" in formal writing. Opt for grammatically correct alternatives like "doubt about what" or "uncertainty regarding what".
Common error
The word "doubt" typically pairs with prepositions like "about", "over", or "concerning". Avoid incorrect preposition pairings to maintain clarity and grammatical accuracy.
Source & Trust
89%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "doubt as what" functions as a conjunction phrase that introduces an element of uncertainty or questioning. However, according to Ludwig AI, this is grammatically incorrect.
Frequent in
News & Media
50%
Science
50%
Formal & Business
0%
Less common in
Academia
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "doubt as what" is grammatically incorrect and has limited usage. Ludwig AI identifies it as an incorrect expression, recommending alternatives like "doubt about what". While it appears in some news and scientific articles, its incorrect structure suggests avoiding it in formal writing. The most authoritative sources do not consistently use it. Therefore, it's best to use established alternatives for clarity and grammatical correctness.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
Doubt about what
Replaces "as" with the more standard preposition "about".
Uncertainty regarding what
Substitutes "doubt" with "uncertainty" and "as" with "regarding", offering a more formal tone.
Question as to what
Replaces "doubt" with "question", changing the emphasis slightly.
Skepticism about what
Uses "skepticism" instead of "doubt", indicating a stronger disbelief.
Confusion about what
Replaces "doubt" with "confusion", focusing on a lack of understanding.
Indecision regarding what
Uses "indecision" instead of "doubt", highlighting an inability to choose.
Ambivalence about what
Substitutes "doubt" with "ambivalence", showing mixed feelings or ideas.
Hesitation about what
Replaces "doubt" with "hesitation", emphasizing a pause or reluctance.
Reservations about what
Uses "reservations" instead of "doubt", indicating concerns or misgivings.
Apprehension about what
Substitutes "doubt" with "apprehension", suggesting anxiety or fear.
FAQs
What's a correct alternative to "doubt as what"?
Alternatives include "doubt about what", "uncertainty about what", or "question as to what".
Is "doubt as what" grammatically correct?
No, "doubt as what" is not considered grammatically correct in standard English. Use "doubt about what" instead.
How can I use "doubt" correctly in a sentence?
Use "doubt" with prepositions like "about", "over", or "concerning", such as in the phrases "doubt about the issue" or "doubt concerning the results".
What's the difference between "doubt as what" and "doubt about what"?
"Doubt as what" is grammatically incorrect, while "doubt about what" is the correct and widely accepted form to express uncertainty.
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
89%
Authority and reliability
2.8/5
Expert rating
Real-world application tested