could not been

USAGE SUMMARY

The phrase "could not been" is not correct in written English.
The correct form would be "could not have been." Example: "I could not have been more surprised by the outcome of the event."

⚠ May contain grammatical issues

Science

News & Media

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

The Independent called child trust fund providers to ask whether they could transfer CTF cash, only to be told by helpline assistants that advice could not been given until the final regulations were released.

Independent

The mechanism underlying such an association could not been identified.

Annals of Intensive Care

Only in Japan in 1994, about 472000 tons of steel cans could not been recycled.

Waste Management Series

The authors concluded that a preventive effect of olcegepant for nitroglycerin-induced migraine pain could not been confirmed.

The Journal of Headache and Pain

In February, November, December 2008, January April and November 2009 sampling could not been conducted due to legal reasons.

International Aquatic Research

However, a method meant for standardization could not been identified yet, due to the versatile advantages and disadvantages of the different test methods.

Energy

We used the MWW test in those cases in which normality of samples could not been verified with Shapiro-Wilk Normality test.

Journal of Software Engineering Research and Development

The R-factor above 10% reflects the low quality of crystals obtained in the process of recrystallization and better crystals could not been found.

Chemistry Central Journal

Moreover, the significant strengthening effect of SiC nano-particles over micron-scale particles could not been explained by the modified shear-lag model due to their same aspect ratio.

Journal of Alloys and Compounds

In addition to providing the atomic coordinates, the predicted structures have further clarified some ambiguities that could not been uniquely determined by the existing experimental data, such as the directionality of the subunit arrangement in the heteropentamers.

Biochemical and Biophysical Research Communications

The images of two other PEGylated nanoparticles, because of large molecular weights, were agglomerated such that they could not been viewed as sharp as Gd2O3-DEG nanoparticles among their surface covers.

Nanoscale Research Letters

Expert writing Tips

Best practice

Always use "could not have been" instead of "could not been" to ensure grammatical correctness. The auxiliary verb "have" is essential in forming the perfect construction.

Common error

Avoid using the past participle "been" directly after modal verbs like "could". The correct structure requires the auxiliary verb "have" to form the present perfect construction: "could have been".

Linguistic Context

The phrase "could not been" functions as an incorrect attempt to express a past unrealized possibility or state. It aims to combine the modal verb "could" with a negation and a past participle, but fails to adhere to standard English grammar rules, as confirmed by Ludwig AI.

Expression frequency: Very common

Frequent in

Science

88%

News & Media

10%

Wiki

2%

Less common in

Formal & Business

0%

Encyclopedias

0%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "could not been" is grammatically incorrect and should be avoided in formal writing. While Ludwig AI shows it appears relatively frequently, particularly in scientific and news contexts, this is due to errors rather than correct usage. The correct form is "could not have been", which is used to express a past unrealized possibility. Always use "could not have been" or other alternatives like "was not able to be" to ensure your writing is grammatically sound and clear.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

could not have been

Corrects the grammatical error by using the proper perfect form of the verb "be".

was not able to be

Rephrases the sentence to use "able to be" instead of the incorrect "been".

was unable to be

Emphasizes the inability for something to be in a certain state.

could not be

Uses the base form of "be" which is grammatically correct in certain constructions.

has not been

Shifts to present perfect tense, indicating something that has not occurred up to now.

it was not possible to be

Expresses impossibility with a more verbose construction.

it couldn't be

Short for 'it could not be', suitable for expressing impossibility.

could never be

Adds emphasis on the impossibility of something happening or being.

has never been

Similar to 'has not been' but puts more emphasis on it never happening

was not

A shorter alternative that omits the 'able' but implies an inability

FAQs

What is the correct way to use "could not have been" in a sentence?

Use "could not have been" to describe a past possibility that did not occur. For example, "The situation "could not have been worse"" indicates the worst possible outcome.

Is "could not been" ever grammatically correct?

No, "could not been" is grammatically incorrect. The correct form is "could not have been", which uses the auxiliary verb "have" to form the present perfect.

What are some alternatives to "could not have been"?

Alternatives include "was not able to be", "it was not possible to be", or simply "could not be" depending on the intended meaning.

What is the difference between "could not be" and "could not have been"?

"Could not be" generally refers to a present or future possibility, while "could not have been" refers to a past possibility. For example, "That "could not be true"" (present) versus "That "could not have been true"" (past).