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
I formerly believed
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "I formerly believed" is correct and usable in written English.
You can use it when discussing a past belief or opinion that has since changed. Example: "I formerly believed that success was solely based on hard work, but I've come to realize that networking plays a significant role as well."
✓ Grammatically correct
Alternative expressions(20)
I used to believe
I once thought
I previously believed
I used to think
I once believed
I had believed
I was under the impression that
I was of the opinion that
I initially thought
I was of the opinion
I took it for granted
I was under the impression
or so i thought
I originally anticipated
I initially expected
I first thought
I originally thought
I used to feel like
I had the impression that
i used to agree
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified similar examples from authoritative sources
Similar Expressions
60 human-written examples
Thus, all polls formerly believed in so devoutly are now to be despised.
News & Media
If Scenario 1 proves accurate, Early Eocene negative δ13C "hyperthermal" excursions occurred during eccentricity minima rather than maxima as formerly believed.
As a result of advances in neuropharmacology, psychologists discover that human personality is much more plastic than formerly believed.
News & Media
Formerly believed to be separate species, they are now generally thought to be varieties of the species Tragulus kanchil.
Encyclopedias
Maybe a revolution in taste, as when Mannerism was overthrown by the Baroque... Cynthia formerly believed in the 'enormous diversity of things;' now she believes in Kong.
News & Media
It said a pattern of subtle but active faults made the risk of earthquakes to the New York City area substantially greater than formerly believed.
News & Media
Archimedes did not just take steps toward calculus, as formerly believed; he actually created and used calculus methods, the basis for modern engineering and science.
Academia
Maybe a revolution in taste, as when Mannerism was overthrown by the Baroque... Cynthia formerly believed in the 'enormous diversity of things;' now she believes in Kong..
News & Media
And then, in the mid-90s, he had what he describes as "either an epiphany or a nervous breakdown", and reconsidered everything he had formerly believed.
News & Media
She told The Guardian last night: "It was formerly believed that scientists in Germany were oppressed by the Nazi regime, that there were only a few guilty people.
News & Media
The impact of vehicle architecture on traffic regulation, and the convergence of several intracellular pathways in late endosomes, indicates that the particular intracellular route might be less relevant than formerly believed.
Science
Expert writing Tips
Best practice
Use "I formerly believed" when you want to clearly indicate a change in your perspective, particularly when contrasting it with your current understanding. This phrase is most effective in formal writing or when emphasizing the shift in your thinking.
Common error
Avoid using "I formerly believed" in casual conversation or informal writing. The word 'formerly' sounds overly formal in such contexts. Opt for simpler alternatives like "I used to think" or "I once believed" to maintain a natural tone.
Source & Trust
60%
Authority and reliability
3.9/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "I formerly believed" functions as a declarative statement expressing a past conviction or opinion that is no longer held. It's used to introduce a contrast between a previous belief and a current understanding.
Frequent in
Science
0%
News & Media
0%
Formal & Business
0%
Less common in
Science
0%
News & Media
0%
Formal & Business
0%
Ludwig's WRAP-UP
In summary, the phrase "I formerly believed" is a grammatically sound construction used to express a shift in one's beliefs or opinions. It carries a formal tone, making it more suitable for academic, professional, or scientific contexts. While grammatically correct, it's important to consider the audience and choose more common alternatives like "I used to believe" in informal settings. Although there are no real-world examples available to analyze here, this guide provides a comprehensive understanding of its usage, alternatives, and potential pitfalls.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
I used to believe
Emphasizes the past nature of the belief and is a more common, less formal alternative.
I once thought
Highlights a past idea or assumption, suitable when discussing a previous viewpoint.
I previously believed
Similar to the original, but replaces "formerly" with "previously", offering a slightly different tone.
I had believed
Uses the past perfect tense to emphasize that the belief was held before a certain point in time.
I was under the impression that
Indicates that the belief was based on an assumption or incomplete information.
I was of the opinion that
Formally states a past opinion, suitable for academic or professional settings.
I initially thought
Highlights that the belief was held at the beginning of a process or understanding.
Earlier, I believed
Simple and direct, indicating a shift from a prior belief.
My initial belief was
Focuses on the belief itself rather than the act of believing.
In the past, I believed
Emphasizes that belief was valid at some point in the past.
FAQs
What can I say instead of "I formerly believed"?
You can use alternatives like "I used to believe", "I once thought", or "I previously believed" depending on the context.
How do I use "I formerly believed" in a sentence?
"I formerly believed" is used to introduce a statement that you previously accepted as true but no longer do. For example, "I formerly believed that hard work was the only key to success."
Is "I formerly believed" suitable for informal conversations?
While grammatically correct, "I formerly believed" is more appropriate for formal writing or discussions. In informal contexts, phrases like "I used to think" or "I once believed" are more natural.
What's the difference between "I formerly believed" and "I used to believe"?
Both phrases indicate a past belief, but "I formerly believed" carries a more formal tone. "I used to believe" is generally more common and suitable for everyday conversation, while "I formerly believed" is better suited for academic or professional settings.
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
60%
Authority and reliability
3.9/5
Expert rating
Real-world application tested