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 quote

Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

MitStanfordHarvardAustralian Nationa UniversityNanyangOxford

could be existed

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "could be existed" is not correct in English.
The correct form would be "could exist" or "could have existed," depending on the context. Example: "In theory, a creature from the depths of the ocean could exist that we have yet to discover."

⚠ May contain grammatical issues

Science

News & Media

Human-verified examples from authoritative sources

Exact Expressions

2 human-written examples

Suppose that it could be existed as many Lagrangian as the number of Hamiltonian.

We can suggest that the formation of nanoholes on the rubrene NPs might be due to the aggregation of the pristine NPs during the hydrothermal process, in which the empty spaces between the NPs could be existed and induced the nanoholes [30].

Human-verified similar examples from authoritative sources

Similar Expressions

58 human-written examples

At the time that they were aware that a problem could have existed, that's when it should have happened.

News & Media

The New York Times

It could have been that: David exists and Lumpl exists but 'David ≠ Lumpl' is true.

Science

SEP

Nevertheless, some differences could have existed that were not detected.

After decades of suppression, the notion that different opinions could co-exist is profoundly radical.

News & Media

The New York Times

Malebranche argued that the only being in which such ideas could exist is God.

Science

SEP

One thing the Catholic Church could do is to exist more like they do in the parallel universe I described.

News & Media

Huffington Post

The whole embarrassing situation could have been avoided if Pinterest existed then.

Look at the things that we could've been done if this existed earlier.

News & Media

Huffington Post

Where these and other factors that nurture life could exist, isn't it probable, even likely, that some sentient beings would emerge from their version of nutritious ooze?

News & Media

Huffington Post
Show more...

Expert writing Tips

Best practice

Always use the correct grammatical form, which is "could exist" or "could have existed", depending on the intended tense and meaning. Using "could be existed" introduces grammatical errors and confuses the reader.

Common error

Avoid using "could be existed" because it incorrectly combines a modal verb with a passive construction. The correct form utilizes the active voice: "could exist".

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

82%

Authority and reliability

1.8/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "could be existed" attempts to express possibility combined with existence. However, it's grammatically incorrect. Ludwig AI highlights that the accurate form is either "could exist" or "could have existed", depending on the intended timeframe.

Expression frequency: Rare

Frequent in

Science

34%

News & Media

33%

Academia

13%

Less common in

Formal & Business

7%

Wiki

7%

Encyclopedias

3%

Ludwig's WRAP-UP

In summary, the phrase "could be existed" is grammatically incorrect and should be avoided in formal writing. As Ludwig AI points out, the accurate alternatives are "could exist" (present or future possibility) or "could have existed" (past possibility). While the phrase appears in a variety of sources, including some news and scientific contexts, this seems to be due to errors rather than accepted usage. Always strive for grammatical accuracy to clearly convey your intended meaning.

FAQs

What is the correct way to say something might exist?

The correct ways to express that something might exist are to use "could exist", "might exist", or "may exist". The phrase "could be existed" is grammatically incorrect.

Is "could be existed" grammatically correct?

No, "could be existed" is grammatically incorrect. The correct form is "could exist" for present or future possibility, or "could have existed" for past possibility.

What alternatives can I use instead of "could be existed"?

You can use alternatives such as "could exist", "might exist", "may exist", or "potentially exist" depending on the context you want to express.

What's the difference between "could exist" and "could have existed"?

"Could exist" refers to a present or future possibility, while "could have existed" refers to a possibility in the past.

ChatGPT power + Grammarly precisionChatGPT power + Grammarly precision
ChatGPT + Grammarly

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.

Source & Trust

82%

Authority and reliability

1.8/5

Expert rating

Real-world application tested

Most frequent sentences: