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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
was doubtful
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'was doubtful' is correct and usable in written English.
It is used to express that something is uncertain, or unlikely. Example: She was doubtful that she would be able to pass her exam without extra help.
✓ Grammatically correct
News & Media
Science
Alternative expressions(5)
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
Murray said it was doubtful that he would add a player via the draft.
News & Media
But Heffernan was doubtful.
News & Media
Mr. Csoka was doubtful.
News & Media
But Becca was doubtful.
News & Media
Her editor was doubtful.
News & Media
She was doubtful.
News & Media
Con was doubtful.
News & Media
At first Bruno was doubtful.
News & Media
Suzanne Krause, a psychotherapist, was doubtful.
News & Media
Ms. Kozloff, for one, was doubtful.
News & Media
"Initially, I was doubtful about the conspiracy theories.
News & Media
Expert writing Tips
Best practice
Use "was doubtful" to express a moderate level of uncertainty or skepticism. It's stronger than "was unsure" but less definitive than "was certain it wouldn't happen".
Common error
In highly formal or academic writing, consider stronger, more precise alternatives like "questioned the validity of", "expressed reservations about", or "found unconvincing". "Was doubtful" can sometimes sound too informal for certain contexts.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "was doubtful" functions as a predicative adjective phrase, modifying the subject of a sentence to express a state of uncertainty or skepticism. Ludwig AI confirms the phrase is correct and usable in English, indicating its acceptance in standard grammatical structures.
Frequent in
News & Media
67%
Science
25%
Encyclopedias
3%
Less common in
Wiki
2%
Formal & Business
1%
Academia
1%
Ludwig's WRAP-UP
In summary, "was doubtful" is a grammatically sound and versatile phrase used to express uncertainty or skepticism. Ludwig AI affirms its correctness and usability. Its prevalence in diverse sources, including News & Media and scientific publications, underscores its broad applicability. While suitable for most contexts, writers should consider more formal alternatives for highly academic or professional settings. The phrase functions as a predicative adjective, conveying a lack of conviction regarding a particular subject or situation. Its frequent usage solidifies its place as a common and easily understood expression of doubt.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
was dubious
A more formal synonym, indicating uncertainty or hesitation.
had doubts
Focuses on the existence of uncertainty rather than expressing it directly as a state.
was unconvinced
Highlights the lack of persuasion or belief.
remained unconvinced
Suggests a continued state of disbelief or lack of persuasion.
felt uncertain
Highlights the feeling of uncertainty, emphasizing the emotional aspect.
was skeptical
Emphasizes a questioning attitude and a tendency to disbelieve.
was hesitant
Emphasizes the reluctance or unwillingness to believe or accept something.
questioned the likelihood
Specifically addresses the probability of something happening.
expressed reservations
Focuses on the act of voicing concerns or doubts.
viewed with suspicion
Implies a distrustful perspective.
FAQs
How can I use "was doubtful" in a sentence?
You can use "was doubtful" to express uncertainty or skepticism about something. For example, "She was doubtful that the project would succeed given the limited resources".
What's a more formal alternative to "was doubtful"?
In formal contexts, consider alternatives like "was skeptical", "expressed reservations", or "remained unconvinced".
Is it grammatically correct to say "was doubtful about"?
Yes, it's grammatically correct. You can follow "was doubtful" with "about" and the object of your doubt, like "He was doubtful about the accuracy of the report".
What's the difference between "was doubtful" and "was suspicious"?
"Was doubtful" indicates uncertainty or lack of confidence, while "was suspicious" implies a belief that something is wrong or dishonest. "She was doubtful that he was telling the truth" expresses uncertainty, whereas "She was suspicious of his motives" suggests she believed he was being dishonest.
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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