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 been demonstrated
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "as been demonstrated" is not correct in English.
Did you mean "has been demonstrated"? You can use the correct phrase when referring to evidence or examples that support a claim or argument. Example: "The effectiveness of the new policy has been demonstrated through various studies and reports."
⚠ 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
6 human-written examples
For many other vertebrate groups, it as been demonstrated that CYP19 plays a key role in sex differentiation [ 3].
Science
Indeed, coherent coupling in such a system as been demonstrated [10].
Science
Data quality is important for QSAR/QSPR models and their predictive ability, as been demonstrated in previous work using the logP dataset which showed improved performance after curation [54].
Science
This is not without precedent, as it as been demonstrated that this cell line is relatively insensitive to chemotherapy (Xu et al. 2006 a, Qian et al. 2010).
Science
Importantly, we cannot exclude the possibility that some of the effects that we observe may be due to removal of H19 non-coding RNA, as been demonstrated in the small intestine (Yoshimizu et al, 2008).
Science
If, as been demonstrated with antibiotic resistance spread between bacterial cells communicating via TnTs, cancer cells propagate chemoresistance by sending counteractive resistant signals or genetic codes of resistance via TnTs, targeting these nanotubes will help us understand if chemoresistance is an avoidable phenomenon, rather than inevitable.
Human-verified similar examples from authoritative sources
Similar Expressions
54 human-written examples
Holding territory will be difficult, however, since the al-Qaida-linked militants are skilled in guerrilla war, as was demonstrated after Ethiopia invaded Somalia in late 2006.
News & Media
And that in itself has a long history in his career, as is demonstrated in a series of early works on paper in an adjoining gallery.
News & Media
We do not, and as was demonstrated in this study, most people would have a hard time sticking to prolonged fasting regimens like that.
Academia
Remarkably, PSA constitutes a positive feedback loop stimulating AR expression as was demonstrated in vitro [ 175].
FOX2-dependent AS was demonstrated for SLK in a study of human embryonic stem cells [ 62].
Science
Expert writing Tips
Best practice
Always use the correct auxiliary verb form, "has", instead of "as" when intending to say something has been demonstrated. Using "has" ensures grammatical accuracy and clarity in your writing.
Common error
Avoid substituting "as" for "has" when constructing perfect tense phrases. "As" functions as a conjunction or preposition, not an auxiliary verb; using it in place of "has" creates a grammatical error.
Source & Trust
87%
Authority and reliability
1.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "as been demonstrated" is intended to function as part of a passive construction, indicating that something has been shown or proven. However, this specific phrase is grammatically incorrect. As Ludwig AI shows, the correct form is "has been demonstrated".
Frequent in
Science
36%
News & Media
55%
Academia
9%
Less common in
Encyclopedias
0%
Formal & Business
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, the phrase "as been demonstrated" is grammatically incorrect and should be avoided. The correct phrase is "has been demonstrated". While the phrase appears in various contexts, including science, news and media, its incorrect grammar reduces its credibility. Always use "has" instead of "as" as the auxiliary verb in this construction, and consider alternatives like "has been shown" or "demonstrated" for conciseness. The Ludwig AI tool highlights the grammatical error and provides examples of correct usage.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
has been demonstrated
Corrects the grammatical error by using the proper auxiliary verb "has" instead of "as".
as has been demonstrated
Rephrases to a grammatically correct structure, emphasizing the demonstrative aspect.
as demonstrated
Offers a more concise and direct way to express that something has been shown.
it has been shown
Uses a more formal tone and emphasizes the act of showing or proving something.
it has been proven
Similar to 'it has been shown' but emphasizes the act of proving something definitively.
evidence suggests
Highlights the evidentiary aspect, implying demonstration through evidence.
research indicates
Focuses on the research aspect, suggesting that demonstration comes from research findings.
studies confirm
Emphasizes confirmation through studies, acting as a form of demonstration.
the data shows
Refers to data as the means of demonstration, implying empirical evidence.
facts reveal
Emphasizes factual revelation as the means of demonstration.
FAQs
What is the correct way to say "as been demonstrated"?
The correct way to phrase this is "has been demonstrated". The auxiliary verb "has" is required for the present perfect passive construction.
Can I use "as" instead of "has" in similar phrases?
No, "as" and "has" have distinct grammatical functions. "As" introduces clauses or acts as a preposition, while "has" is an auxiliary verb used to form perfect tenses. Using "as" in place of "has" is grammatically incorrect.
What are some alternatives to "has been demonstrated"?
Depending on the context, you can use phrases like "has been shown", "has been proven", or simply "demonstrated".
Is "as was demonstrated" grammatically correct?
Yes, "as was demonstrated" is grammatically correct. It uses "as" to introduce a clause indicating something that has been shown or proven in the past, and it's frequently used in formal writing.
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
87%
Authority and reliability
1.8/5
Expert rating
Real-world application tested