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
CEO of Professional Science Editing for Scientists @ prosciediting.com
this isn't
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "this isn't" is correct and usable in written English.
It can be used to indicate that something does not conform to a particular expectation or description. Example: "This isn't the book I ordered; I wanted the latest edition."
✓ Grammatically correct
News & Media
Science
Alternative expressions(5)
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
60 human-written examples
This isn't Chicago, this isn't Paris.
News & Media
"This isn't fair — this isn't justice".
News & Media
This isn't arithmetic.
News & Media
This isn't their fault.
News & Media
This isn't about you.
News & Media
This isn't Friends.
News & Media
"This isn't a system.
News & Media
This isn't Prohibition.
News & Media
This isn't me.
News & Media
This isn't clean!
News & Media
This isn't a seminar.
News & Media
Expert writing Tips
Best practice
Use "this isn't" to directly contradict a statement or assumption, creating a clear contrast. For example, "This isn't just a game; it's a matter of survival."
Common error
Avoid using "this isn't" when a broader, more nuanced negation is required. For instance, instead of saying "This isn't good," consider "The results are less than ideal."
Source & Trust
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "this isn't" serves as a negating declarative. It introduces a statement that contradicts a preceding claim or expectation. Ludwig AI shows that this can be used in a broad range of contexts, showing something that something is not.
Frequent in
News & Media
63%
Science
31%
Formal & Business
6%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "this isn't" is a common and versatile expression used to negate or contradict a statement, assumption, or expectation. It's grammatically correct and appropriate for most contexts, though alternatives like "this is not" might be preferred in more formal settings. As Ludwig AI confirms, the phrase is widely used in various types of writing from media to science, serving to clarify what something is not, and thereby shaping understanding through contrast.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
this is not
Formal and direct negation; suitable for situations requiring precision.
that isn't
Similar to "this isn't" but referencing something slightly more distant or previously mentioned.
that is not
Shifts the focus to something other than the immediate subject; indicates a different case.
it is not
Impersonal and factual; suitable for objective statements.
it's not
A contraction of "it is not", offering a slightly more casual tone than "it is not" but more formal than "this ain't".
this does not
Emphasizes the absence of an action or quality in a more formal way.
that does not
Refers to something else rather than the immediate subject.
it doesn't
Short form of "it does not"
this ain't
Colloquial and informal; suitable for casual conversation.
this is hardly
Implies something is only slightly true or present; softer negation.
FAQs
How can I use "this isn't" in a sentence?
Use "this isn't" to negate a statement or expectation directly. For example, "This isn't what I signed up for" or "This isn't the right way to do it."
What are some alternatives to using "this isn't"?
Alternatives include "this is not", "that isn't", or "it's not", depending on the specific context and desired level of formality.
Which is correct, "this isn't" or "this is not"?
Both "this isn't" and "this is not" are grammatically correct. "This isn't" is a contraction and is generally more common in informal contexts, while "this is not" is more formal.
What's the difference between "this isn't" and "that isn't"?
"This isn't" refers to something present or immediate, while "that isn't" refers to something more distant or previously mentioned. The choice depends on what you are negating or contrasting.
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.
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
4.6/5
Expert rating
Real-world application tested