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
as once
Grammar usage guide and real-world examplesUSAGE SUMMARY
"as once" is correct and can be used in written English.
You can use "as once" to contrast how something used to be (or was once) with how it is now. For example: "The area was once bustling with activity, but now it's quiet and somber, as once."
✓ Grammatically correct
News & Media
Science
Encyclopedias
Wiki
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
I called after her just as, once again, Tapka deposited Clonchik at my feet.
News & Media
Particularly as, once rebuffed, he now looks set to come back with his fists up.
News & Media
The investigators should be congratulated as, once again, the bar has been raised.
Science
As once there used to be.
News & Media
Winds are not as important as once thought.
News & Media
Some will be furloughed as often as once a week.
News & Media
Stockhausen's harmonic writing is as once pungent and alluring.
News & Media
Patients get an injection as often as once a month.
News & Media
There, as once here, a terrible beauty is born.
News & Media
"Only 18% do so as often as once a fortnight.
News & Media
"But it doesn't happen as often as once a year".
News & Media
Expert writing Tips
Best practice
Use "as once" to clearly establish a contrast between a past state or belief and the current reality or understanding.
Common error
Avoid using "as once" excessively in contemporary writing, as it can sound archaic. Modern alternatives like "as was once" or rephrasing the sentence may improve clarity and readability.
Source & Trust
83%
Authority and reliability
3.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "as once" functions as an adverbial phrase, modifying a verb or clause to indicate a comparison between a past state and the current state. This is evident from Ludwig, which provides examples showcasing its usage to contrast former beliefs with current understandings.
Frequent in
News & Media
30%
Science
25%
Wiki
20%
Less common in
Encyclopedias
15%
Formal & Business
5%
Reference
5%
Ludwig's WRAP-UP
In summary, the phrase "as once" serves to draw a comparison between a past and present state, belief, or condition. While grammatically correct, Ludwig indicates that its usage is relatively rare and can sometimes sound formal or archaic. The phrase appears in a range of contexts, including news, science, and encyclopedic sources, and offers a way to highlight a shift in understanding or circumstances. When considering its use, remember that more common alternatives may provide improved clarity and readability.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
as previously
Focuses on a prior state without necessarily implying a contrast with the present.
formerly
Emphasizes the past nature of a situation or condition.
in the past
Highlights a time before the present, without the comparative aspect.
at one time
Implies a past occurrence that may or may not continue.
once upon a time
Used primarily in storytelling to introduce a past event or situation.
back then
Refers to a specific period in the past, typically in contrast to the present.
in earlier times
Suggests a comparison between current times and the distant past.
in days gone by
Evokes a sense of nostalgia for the past.
in bygone eras
Similar to "in days gone by", but more formal and emphasizes historical periods.
historically
Refers to past events in a factual or analytical context.
FAQs
How can I use "as once" in a sentence?
Use "as once" to compare a past state, belief, or condition with the present. For instance, "The accepted theory was X, but now, "as once", we know it to be Y".
What is a modern alternative to using "as once"?
Consider alternatives like "as was once", "as it once was", or rephrasing the sentence to improve clarity. For example, instead of "It was thought X, "as once"", try "It was once thought X".
Is "as once" grammatically correct?
Yes, "as once" is grammatically sound, but its usage is infrequent and can sound formal or archaic. Consider the context and audience when deciding whether to use it.
What is the difference between "as once" and "previously"?
"As once" directly implies a contrast between past and present. "Previously" ("as previously") simply refers to an earlier time without necessarily implying a change or contrast.
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
83%
Authority and reliability
3.8/5
Expert rating
Real-world application tested