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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
will have existed
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "will have existed" is correct and usable in written English.
It is typically used to indicate that something will be in existence at a specific point in the future, often in the context of future perfect tense. Example: "By the end of the century, many species will have existed for millions of years."
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(6)
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
Next month, Facebook will have existed for ten years.
News & Media
E-mail address GO SIGN UP Share Tweet Next month, Facebook will have existed for ten years.
News & Media
In other words, we're probably living neither during the first two and a half per cent nor during the last two and a half per cent of all the time that human beings will have existed.
News & Media
A classier kind of Copycat Copycat apps, or copy capps, if you will, have existed for generations.
News & Media
If the cumulative effect of selection forces is quite small and negative on a particular CNV allele, then the CNV allele will have existed for a while but not in the long term (Innan and Kondrashov 2010).
Science
The very large size of the trial population meant that it would have been impractical to collect and analyse detailed (and largely qualitative) information on variations in assessment practices; by the same token it is likely that within the trial there was a range of assessment models, some of which will have existed outside the sites as well.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
54 human-written examples
Since the death of his parents when he was 9, Will has existed in a state of arrested development that a more hardheaded film might identify as extreme post-traumatic stress.
News & Media
If Thursday fails, her husband -- for an extremely complicated set of reasons -- will never have existed.
News & Media
Ms Minto said: "Many of these issues will always have existed, but with better understanding of the problems and ChildLine now offering online chats, which can be easier than picking up the phone, more young people are seeking help".
Science
Whatever good will might have existed, however, was put into some doubt over the Afiuni affair.
News & Media
Though Romana reveals that the equipment will bring him back after two minutes, the Doctor asserts that it is enough time for Scaroth to stop the explosion of the Jagaroth ship, itself the source of the spark of energy that created the beginnings of life on Earth; should Scaroth prevent the explosion, every native living being on the planet will never have existed.
Wiki
Expert writing Tips
Best practice
Use "will have existed" to describe events or entities that will be in a state of completion or existence at a specific point in the future. For example, "By 2050, many technologies we use today will have existed for decades".
Common error
Avoid using "will have existed" when the simple future or future continuous tenses are more appropriate. "Will exist" describes a future state, while "will be existing" describes an ongoing state in the future. "Will have existed" should be reserved for actions completed before a future time.
Source & Trust
89%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "will have existed" functions as a verb phrase in the future perfect tense. It indicates that an action or state of being will be completed before a specific point in the future. As Ludwig AI explains, this usage aligns with established grammatical rules.
Frequent in
News & Media
50%
Science
41%
Wiki
9%
Less common in
Encyclopedias
0%
Formal & Business
0%
Social Media
0%
Ludwig's WRAP-UP
The phrase "will have existed" is a grammatically sound verb phrase in the future perfect tense, used to express that something will be in existence or completed before a specific time in the future. As Ludwig AI confirms, this phrase is correct and applicable in written English. It appears most frequently in news and media, and scientific contexts. While interchangeable with phrases like "will have been around" or "will have been in existence", it's crucial to use it correctly to avoid tense confusion. To this point, it is important to consider the examples and the overall context when employing "will have existed" in your writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
will have been in existence
Emphasizes the state of being in existence, adding a touch of formality.
will have been present
Highlights the presence of something at a future point.
will have been around
Offers a more informal way to indicate existence over a period of time.
will have been
A shorter construction, suitable when the context already implies existence.
will have remained
Suggests that something will continue to exist until a specified time.
will have obtained
Implies achieving a state of existence or being acquired by a certain time.
will have lasted
Focuses on the duration of existence.
will be in the past
Indicates that something's existence is bounded and will be over.
will have ended
Highlights the termination of something that exists.
will be no more
Emphasizes the cessation of existence; somewhat dramatic.
FAQs
How to use "will have existed" in a sentence?
Use "will have existed" to describe something that will be in existence before a specific point in the future. For example: "By the time humans colonize Mars, the International Space Station "will have existed" for over a century."
What can I say instead of "will have existed"?
You can use alternatives such as "will have been around", "will have been in existence", or "will have been present" depending on the specific context and nuance you want to convey.
What is the difference between "will exist" and "will have existed"?
"Will exist" refers to something that will be in existence at some point in the future. "Will have existed", on the other hand, refers to something that will already be in existence before a specified time in the future. The latter emphasizes completion or duration before that future point.
Is "will have been existed" grammatically correct?
No, "will have been existed" is grammatically incorrect. The correct future perfect form is ""will have existed"". The auxiliary verb "be" is unnecessary and creates a redundant construction.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
89%
Authority and reliability
4.1/5
Expert rating
Real-world application tested