have not existed

USAGE SUMMARY

The phrase "have not existed" is correct and usable in written English.
It can be used to indicate that something has not been present or has not occurred up to the present time. Example: "Many species have not existed for millions of years, yet their fossils continue to provide insight into our planet's history."

✓ Grammatically correct

Science

News & Media

Encyclopedias

Human-verified examples from authoritative sources

Exact Expressions

43 human-written examples

Until recently, facile methods to study these processes in intact, living cells have not existed.

Current Opinion in Structural Biology

Since the 17th century they have not existed as a tribal or cultural unit.

Britannica

GS femoral component features should provide better patellar tracking, but techniques have not existed previously to test this accurately.

The Journal of Arthroplasty

The collisions recreate conditions that have not existed in the universe since just after the big bang.

The Guardian

These algorithms can only learn from huge annotated data sets of good examples, which simply have not existed until now.

MIT Technology Review

From my experience as a career coach, career ladders in most organizations have not existed for at least fifteen years.

Harvard Business Review

Human-verified similar examples from authoritative sources

Similar Expressions

17 human-written examples

… I think it may open up new avenues for conversations that haven't existed before.

University of California, Berkeley

But, according to National Science Foundation (NSF) statistics, such conditions haven't existed at least since 2000.

Science Magazine

Chops like hers haven't existed since Janis Joplin.

Huffington Post

In the late plays he moves into landscapes that don't exist and haven't existed.

Vice

Haven't existed for 500 years". She will prove him wrong, of course.

Los Angeles Times

Expert writing Tips

Best practice

When using "have not existed", ensure the tense aligns with the context. For example, use "had not existed" for past perfect constructions to maintain clarity.

Common error

Avoid using "have not existed" when the context requires a different tense. For instance, do not use it to describe a situation in the distant past that concluded long ago; "did not exist" or "had not existed" might be more appropriate.

Linguistic Context

The phrase "have not existed" functions as a stative verb phrase, indicating a condition of non-existence or absence up to the present time. Ludwig AI confirms its grammatical correctness and usability. This phrase typically requires a subject and often an adverbial modifier specifying a time frame or condition.

Expression frequency: Common

Frequent in

News & Media

42%

Science

42%

Academia

8%

Less common in

Encyclopedias

4%

Formal & Business

2%

Wiki

0%

Ludwig's WRAP-UP

The phrase "have not existed" is a versatile and grammatically sound expression used to indicate the absence or non-existence of something up to the present time. Ludwig AI validates its correctness and common usage across various domains. Predominantly found in News & Media and Scientific contexts, its register is generally neutral to formal. When using this phrase, ensure the tense aligns with the intended context, and consider alternatives such as "never existed" or "did not exist" for nuanced meanings.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

never existed

Emphasizes the complete absence of something at any point in time.

did not exist

Focuses on the past absence of something.

have never been present

Highlights the lack of presence or occurrence.

have not been around

Suggests something has been absent or unavailable.

were nonexistent

Indicates that something had no reality or being.

are not in existence

Formal way of saying something does not currently exist.

had no existence

Expresses that something lacked a real or concrete form.

have not materialized

Implies something expected or planned did not come into being.

are absent

Simply states that something is not present.

are lacking

Indicates a deficiency or absence of something needed.

FAQs

What does "have not existed" mean?

The phrase "have not existed" indicates that something has not been present or in existence up to the current time. It implies a lack of historical presence or occurrence.

How can I use "have not existed" in a sentence?

You can use "have not existed" to describe conditions, objects, or concepts that were absent in the past. For instance, "Techniques to accurately test this "have not existed" previously".

What are some alternatives to "have not existed"?

Some alternatives to "have not existed" include "never existed", "did not exist", or "have never been present". The best choice depends on the specific context and desired emphasis.

Is it better to use "have not existed" or "did not exist"?

The choice between "have not existed" and "did not exist" depends on the time frame you're referring to. "Have not existed" typically implies a connection to the present, while "did not exist" refers to a completed past action or state.