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
the subject is
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "the subject is" is correct and usable in written English.
It can be used when introducing or discussing the main topic or focus of a sentence or discussion. Example: "In this essay, the subject is the impact of climate change on global agriculture."
✓ Grammatically correct
News & Media
Science
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
58 human-written examples
The subject is dancing.
News & Media
"The subject is over.
News & Media
The subject is hunger.
News & Media
But the subject is painful.
News & Media
Here the subject is Schubert.
News & Media
The subject is deemed distasteful.
News & Media
The subject is not new.
News & Media
The subject is anything but.
News & Media
The subject is worthy.
News & Media
The subject is extraordinary.
News & Media
"The subject is taboo.
News & Media
Expert writing Tips
Best practice
When using "the subject is", ensure it clearly introduces the main topic to avoid ambiguity. For example, begin a paragraph with the phrase to immediately orient the reader.
Common error
Avoid using "the subject is" when you're actually referring to an attribute or characteristic of the subject. Ensure the identified subject aligns with the core discussion.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the subject is" serves primarily as a declarative statement to introduce or identify the central theme, topic, or focus of a discussion, analysis, or piece of writing. As Ludwig AI confirms, it’s a grammatically sound and widely used expression for setting context.
Frequent in
News & Media
71%
Science
17%
Wiki
5%
Less common in
Formal & Business
3%
Encyclopedias
2%
Reference
2%
Ludwig's WRAP-UP
In summary, "the subject is" is a grammatically correct and highly versatile phrase, as validated by Ludwig AI, used to explicitly introduce or define the central topic of discussion. Its frequency across diverse sources like The New York Times and Huffington Post underscores its widespread applicability. While appropriate for various contexts, it's particularly effective in formal and neutral settings, ensuring clarity and focus. To maximize its impact, use it to precisely orient your audience and avoid misidentifying the true subject. Consider alternatives like "the topic is" or "the focus is" to suit different nuances. By following these guidelines, you'll master the art of using "the subject is" for effective communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
the topic is
Replaces "subject" with "topic", a direct synonym, maintaining a neutral tone.
the focus is
Shifts from the broad concept of "subject" to the more specific idea of "focus", highlighting the central point.
the issue is
Emphasizes a problem or matter of debate, making it suitable for discussions of contentious subjects.
we're discussing
Adopts a more conversational tone, indicating an active discussion in progress.
this concerns
Highlights the relevance of the subject to a particular entity or group.
it's about
Uses a more informal and direct approach to introduce the subject.
this involves
Indicates that the subject includes multiple elements or aspects.
the matter at hand is
Emphasizes the immediacy and importance of the subject under consideration.
what we're dealing with is
Highlights the active engagement with the subject, often implying a challenge or complexity.
the central theme is
Focuses on the underlying idea or message, particularly in artistic or literary contexts.
FAQs
How can I use "the subject is" in a sentence?
Use "the subject is" to clearly introduce the main topic or focus of your discussion. For example: "In this report, the subject is renewable energy sources."
What are some alternatives to saying "the subject is"?
You can use alternatives like "the topic is", "the focus is", or "the issue is" depending on the specific context.
Is it grammatically correct to start a sentence with "the subject is"?
Yes, it is grammatically correct to start a sentence with "the subject is" when you want to explicitly identify what you are going to discuss. This is especially useful for clarity in academic or formal writing.
When should I use "the subject is" versus "it is about"?
"The subject is" is more formal and direct, suitable for academic or professional contexts. "It is about" is more informal and conversational. Use "the subject is" when precision and clarity are paramount.
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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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested