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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
this is a
Grammar usage guide and real-world examplesUSAGE SUMMARY
"this is a" can be used in written English.
For example, you might use it to introduce something, such as "This is a great new restaurant."
✓ Grammatically correct
News & Media
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 is a studio.
News & Media
This is a fantasy.
News & Media
This is a tradition".
News & Media
"This is a pattern.
News & Media
This is a puzzle.
News & Media
"This is a bet.
News & Media
This is a misunderstanding.
News & Media
This is a prototype.
News & Media
This is a foul.
News & Media
"This is a trio".
News & Media
This is a slugfest.
News & Media
Expert writing Tips
Best practice
Use "this is a" to clearly introduce or define something, ensuring the context provides enough information for understanding.
Common error
Avoid starting too many sentences with "this is a" in the same paragraph, especially in formal writing. Vary sentence structure to maintain reader engagement and avoid sounding repetitive.
Source & Trust
91%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "this is a" primarily functions as a declarative statement, introducing or defining a subject. It provides a basic assertion, similar to the examples Ludwig AI provided, such as "This is a studio" or "This is a fantasy".
Frequent in
News & Media
100%
Less common in
Science
0%
Formal & Business
0%
Academia
0%
Ludwig's WRAP-UP
In summary, "this is a" is a versatile phrase used to introduce, define, or categorize a subject. Ludwig AI indicates that the phrase is grammatically correct and sees widespread use in various forms of written English, mainly appearing in news and media. While fundamentally sound, overuse in formal contexts can lead to repetitiveness, so varied sentence structures are preferable. Related phrases like "this represents a" or "it's an" can provide alternative ways to express similar ideas. The phrase is very common and suitable for neutral registers, offering clarity and directness in communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
this represents a
Replaces "is" with "represents", emphasizing representation rather than simple identification.
this constitutes a
Substitutes "is" with "constitutes", highlighting the components or elements that form something.
it's an
A contraction of "it is a/an", offering a more informal tone and changing the subject.
this represents an
Combines the representational aspect with the indefinite article change.
it is here a
Adds the element of location/existence with "here", slightly altering the focus.
such is a
Inverts the structure, emphasizing the nature or quality of what follows.
that's a
Changes the demonstrative pronoun from "this" to "that", indicating something further away or already known.
this question is a
Narrows down what's being defined to 'question'.
this is just an
Adds "just" to the phrase, conveying the meaning of this being only something.
this is nothing but a
Expresses that it is only what is said and nothing more.
FAQs
How can I use "this is a" in a sentence?
Use "this is a" to introduce a definition, explanation, or observation. For example, "This is a crucial step in the process" or "This is a common misconception".
What are some alternatives to "this is a"?
Depending on the context, you can use phrases like "this represents a", "this constitutes a", or "it's an".
Is it correct to start a formal essay with "this is a"?
While grammatically correct, starting an essay frequently with "this is a" can sound repetitive. Opt for stronger, more varied sentence openings to enhance formality and sophistication.
What is the difference between "this is a" and "that is a"?
"This is a" typically refers to something nearby or currently under discussion, while "that is a" refers to something further away or previously mentioned. The choice depends on the context and proximity.
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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