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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
primary subject
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "primary subject" is correct and usable in written English.
It can be used in contexts such as academic writing, research, or discussions where you need to identify the main topic or focus of a study or analysis. Example: "In this research paper, the primary subject is the impact of climate change on marine biodiversity."
✓ Grammatically correct
News & Media
Science
Encyclopedias
Alternative expressions(20)
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
Human figures were the primary subject.
Encyclopedias
Routine suburban dysfunction is once again the primary subject.
News & Media
Its primary subject was the meanness of middle-school students.
News & Media
Her primary subject that day was infant attachment.
News & Media
In a sense the reality of figurative painting itself has always been Mr. Freud's primary subject.
News & Media
But repressed homosexuality is hardly the primary subject of "The Bacchae".
News & Media
(They are the primary subject of her best-known book, "The Gentrification of the Mind").
News & Media
Then paint or draw a composition in which food is the primary subject.
News & Media
The fact that Thomas delays introduction of the book's primary subject becomes crucial to its depiction.
News & Media
Light alone, reflected off planetary shapes and diffused in swirling mist, is her primary subject.
News & Media
Both men used the American upper crust as their primary subject matter.
News & Media
Expert writing Tips
Best practice
When writing, clearly define the "primary subject" early in your text to provide context and guide the reader's understanding.
Common error
Avoid obscuring the "primary subject" with excessive details. Ensure the main focus remains clear throughout your writing.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "primary subject" functions as a noun phrase, typically acting as a subject complement or object of a preposition. It serves to identify the main topic or focus of something, as shown in Ludwig's examples.
Frequent in
News & Media
40%
Science
25%
Encyclopedias
10%
Less common in
Wiki
10%
Formal & Business
8%
Reference
7%
Ludwig's WRAP-UP
In summary, "primary subject" is a versatile noun phrase used to pinpoint the main focus or topic in various contexts. Ludwig AI indicates that this phrase is grammatically sound and frequently encountered in formal to neutral registers, particularly in news, science, and encyclopedic content. Alternative phrases like "main topic" or "central theme" can be used for variety, but "primary subject" maintains a clear and professional tone. When employing this phrase, ensure that the main focus remains evident and isn't overshadowed by secondary details.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
Main topic
Replaces "subject" with "topic", focusing on the central theme.
Central theme
Emphasizes the core idea or message.
Key focus
Highlights the most important area of attention.
Principal focus
Uses "principal" as a synonym for "primary", indicating the main point.
Core subject matter
Replaces "subject" with "subject matter", adding emphasis.
Main focus area
Specifies the central area of attention.
Central point
Highlights the most important idea or argument.
Overriding theme
Implies a dominant or prevailing subject.
Focal point
Emphasizes the center of interest or activity.
Principal concern
Focuses on the main worry or issue.
FAQs
How can I use "primary subject" in a sentence?
You can use "primary subject" to identify the main topic or focus of a discussion, study, or analysis. For example, "The "primary subject" of this research is the impact of social media on political discourse."
What are some alternatives to "primary subject"?
Alternatives to "primary subject" include "main topic", "central theme", and "key focus". The best choice depends on the specific context and nuance you want to convey.
Is it redundant to say "primary subject matter"?
While not strictly incorrect, "primary subject matter" can be seen as slightly redundant since "subject matter" inherently implies the topic. Using just ""primary subject"" is often more concise and effective.
What's the difference between "primary subject" and "secondary subject"?
The ""primary subject"" is the main focus, while the "secondary subject" is a related but less central topic. For example, if the primary subject is climate change, a secondary subject might be renewable energy sources.
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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
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested