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 we known
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'As we known' is not correct and isn't used in written English.
Instead, you could use phrases such as 'As we know' or 'As is known'. For example: As we know, the importance of protecting the environment has been increasingly recognized in recent years.
⚠ May contain grammatical issues
Science
News & Media
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
As we known, NH3 is a strong electron donor [17], since MPc derivatives are well-known p-type semiconductor, NH3 can be chemisorbed on the MPc, which leads to electrons transfer from NH3 to MPc.
Science
As we known, the true machining errors are deviations between designed surface and tool envelope surface.
Science
As we known, the 735/850-nm combination is enough for quantifying the changes of oxy-hemoglobin (∆ HbO2) and deoxy-hemoglobin (∆ Hb).
Science
As we known, composite sandwich structure with advantages of high specific strength/modulus, high temperature resistance, damping, etc., which is widely used in various fields.
Science
As we known that the Venturi meter used in wet gas gives the higher measured differential pressure reading than in single gas phase flow, which is called over-reading.
As we known, C1 is better than C2.
As we known, the vorticity (omega=nablatimes u), where u is the velocity field.
Science
As we known, CdSe has three crystalline forms wurtzite (hexagonal), sphalerite (cubic), and rock-salt (cubic).
Science
As we known, the existence of homoclinic orbits is very important in the study of the behavior of dynamical systems.
Science
As we known, the precision of the depth sensing is relative with the period of the fringe pattern.
As we known, the optical output power improved only 30% if ITO as TCL on LEDs [26, 27].
Science
Expert writing Tips
Best practice
Always use the correct grammatical form, such as "As we know" or "As is known", to maintain credibility and clarity in your writing.
Common error
Avoid using the incorrect form "As we known". This error undermines the professionalism of your writing. Proofread carefully to ensure correct verb conjugations.
Source & Trust
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "As we known" is intended as an introductory phrase. However, it's grammatically incorrect. The correct form is "As we know" or "As is known". Ludwig AI confirms the phrase is incorrect.
Frequent in
Science
78%
News & Media
14%
Formal & Business
8%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "As we known" is a very common grammatical error, particularly prevalent in scientific and academic writing. Despite its frequency, it is incorrect; the proper forms are "As we know" or "As is known". Ludwig AI flags this phrase as incorrect. While the intent is to introduce shared knowledge, the error detracts from the writing's credibility. When writing, always ensure you are using the correct verb conjugation. Alternative phrases like "it is well known that" can also effectively convey the intended meaning. Remember to proofread carefully to avoid such common errors.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
As we know
Corrects the grammatical error by using the correct form of the verb "know".
As is known
Presents a passive construction emphasizing the established nature of the information.
It is well known that
Emphasizes the widespread knowledge of the subsequent statement.
We all know that
Highlights a shared understanding between the speaker and the audience.
Everyone knows that
Similar to "we all know that" but with a broader scope.
It's common knowledge that
Indicates the information is widely understood and accepted.
It is understood that
Suggests an implicit agreement or understanding.
It's a given that
Implies the information is a fundamental assumption.
As is widely recognized
Highlights that the information is broadly accepted.
We are aware that
Acknowledges understanding of a fact among a group.
FAQs
What's the correct way to start a sentence: "As we know" or "As we known"?
The correct way to start a sentence is "As we know". "As we known" is grammatically incorrect.
What can I say instead of "As we known"?
Since "As we known" is incorrect, you can use alternatives like "As we know", "As is known", or "it is well known that".
Is "As we known" ever correct?
No, "As we known" is never grammatically correct in standard English. The correct phrase is "As we know".
How can I remember to use "As we know" instead of "As we known"?
A simple trick is to remember that "know" is the base form of the verb, and it follows "we". Think of other phrases like "as we see" or "as we understand" to reinforce the correct pattern.
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
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested