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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
they have not
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "they have not" is correct and usable in written English.
It can be used to indicate that a subject has not performed an action or does not possess something. Example: "They have not completed the project by the deadline."
✓ Grammatically correct
News & Media
Academia
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
57 human-written examples
They have not lost.
News & Media
They have not worked.
News & Media
They have not.
News & Media
Which they have not.
News & Media
They have not lasted.
News & Media
Yet they have not.
News & Media
Indeed, they have not.
News & Media
But they have not.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
3 human-written examples
Maybe they haven't.
News & Media
Regretfully, they haven't.
News & Media
They haven't".
News & Media
Expert writing Tips
Best practice
Use "they have not" when a formal tone is required, especially in academic or professional writing. In less formal contexts, "they haven't" is perfectly acceptable.
Common error
Ensure the verb tense following "they have not" aligns with the intended meaning. For example, use the past participle (e.g., "they have not finished") to indicate an uncompleted action.
Source & Trust
91%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they have not" functions as a negated auxiliary verb phrase. It combines the pronoun 'they', the auxiliary verb 'have', and the negation 'not' to indicate the absence of a completed action or a current state. Ludwig confirms its correct usage.
Frequent in
News & Media
60%
Academia
25%
Science
5%
Less common in
Formal & Business
3%
Wiki
2%
Reference
1%
Ludwig's WRAP-UP
In summary, the phrase "they have not" is a grammatically sound and frequently used construction to express negation or the absence of a completed action. Ludwig AI confirms its validity, showing its presence across diverse sources like news, academic papers, and general media. While adaptable for both formal and informal contexts, it is especially useful when a neutral or somewhat formal tone is required. Alternatives such as "they haven't" or "they did not" may be suitable depending on the specific context and desired level of formality. It's important to ensure the verb tense used after the phrase aligns with the intended meaning.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
they didn't
A more concise and informal contraction of "they did not", implying a past absence of action.
they haven't
A contracted form of "they have not", suitable for less formal contexts.
they did not
A more explicit and formal way to say "they didn't", used to emphasize the absence of a past action.
it is not the case that they have
Emphasizes the falsity of a previous assumption or statement about their actions.
they are yet to
Indicates that an action is expected in the future but hasn't occurred yet.
they fail to
Highlights a consistent lack of performance or execution.
they are unable to
Focuses on the inability or lack of capacity to perform an action.
they can't
A contraction of "they cannot", expressing an inability or lack of permission.
they could not
Indicates past inability or lack of opportunity.
they are not
This phrase expresses something that they are not presently, used to describe someone's role or state.
FAQs
How can I use "they have not" in a sentence?
Use "they have not" to indicate that a group of people has not performed a specific action or achieved a certain state. For example, "They have not completed the project on time" or "They have not been informed about the changes".
What's a more informal way to say "they have not"?
You can use the contraction "they haven't" as a more informal alternative to "they have not". For example, instead of saying "They have not finished eating", you can say "They haven't finished eating".
What can I say instead of "they have not" to emphasize a failure?
To emphasize a failure, you could say "they "fail to"". For example, instead of saying "They have not met the requirements", you can say "They fail to meet the requirements".
How does "they have not" differ from "they did not"?
"They have not" implies a state that continues to the present, while "they did not" refers to a completed action in the past. For example, "They have not seen the movie" implies they still haven't, while "They did not see the movie" simply states they didn't see it at a specific time.
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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
91%
Authority and reliability
4.5/5
Expert rating
Real-world application tested