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
subject in which
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "subject in which" is correct and usable in written English.
It can be used to refer to a specific topic or area of study within a broader context. Example: "The research paper focuses on the subject in which the effects of climate change are analyzed."
✓ Grammatically correct
News & Media
Science
Encyclopedias
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
59 human-written examples
It is a subject in which Mr Balls himself has an A to C GCSE pass.
News & Media
They need to read challenging books in a subject in which they are interested".
News & Media
This is a subject in which the public has a legitimate interest.
News & Media
Such behaviour is similar to the random diffusion of neutrons, a subject in which Wilkinson had become expert.
News & Media
At the time, I was doing research for a book about a subject in which the Mongols came up occasionally.
News & Media
Aside from sports, and despite his early speech problems, drama was the only subject in which he excelled.
News & Media
It is a subject in which she has a personal interest since both her parents died of cerebrovascular attacks.
News & Media
In Oxford, he taught European and Latin American history, the subject in which he briefly held a chair (1967-68).
News & Media
Second, race isn't the only subject in which there are really painful arguments, in Greenwich and beyond, usually left bubbling just below the placid surface of daily life.
News & Media
Here, she conducts a workshop on the 19th-century Swedish soprano Jenny Lind, a subject in which Ms. Bonney has developed a speciality.
News & Media
As schools struggle to recruit staff, more and more teachers are being asked to take on a subject in which they have little expertise.
News & Media
Expert writing Tips
Best practice
Use "subject in which" to introduce a clause that provides specific detail or context about a previously mentioned subject. This helps to maintain clarity and flow in your writing.
Common error
Avoid using additional pronouns after "subject in which". For instance, do not write "the subject in which it is important"; instead, use "the subject in which is important" to prevent redundancy.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "subject in which" functions as a relative clause introducer, specifying the context or area related to a particular subject. It connects a noun (subject) with a modifying clause that provides additional information about it, such as, 'It is a "subject in which" Mr. Balls himself has an A to C GCSE pass'. As noted by Ludwig AI, this phrase is grammatically sound and usable.
Frequent in
News & Media
40%
Science
30%
Encyclopedias
10%
Less common in
Wiki
8%
Formal & Business
6%
Reference
6%
Ludwig's WRAP-UP
In summary, "subject in which" is a versatile phrase used to introduce clarifying information about a particular subject. As confirmed by Ludwig AI, the phrase is grammatically correct and widely used. It is common in various contexts, particularly in news, science, and encyclopedic sources. When using "subject in which", ensure that the following clause directly relates to and provides specific details about the subject being discussed. Avoiding redundant pronouns after "subject in which" will enhance clarity. Consider using alternatives such as "topic where" or "area that" for variety, but recognize that "subject in which" often provides a more formal and precise tone.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
topic where
Changes the preposition and uses a slightly more casual term.
field where
Substitutes 'subject' for 'field' and uses 'where' instead of 'in which'.
discipline that
Substitutes 'subject' for 'discipline' and 'in which' with 'that', suitable for academic contexts.
area that
Replaces 'subject' with 'area' and uses 'that' instead of 'in which'.
matter that
Replaces 'subject' with 'matter' and 'in which' with 'that'.
context where
Replaces 'subject' with 'context' and 'in which' with 'where'.
domain that
Replaces 'subject' with 'domain' and 'in which' with 'that', offering a slightly more formal tone.
sphere where
Replaces 'subject' with 'sphere' and 'in which' with 'where', adding a slightly more abstract feel.
topic wherein
Uses a more formal, albeit archaic, preposition.
area in that
Changes the structure while maintaining similar meaning.
FAQs
How can I use "subject in which" in a sentence?
Use "subject in which" to specify a particular area or topic being discussed. For example, "Mathematics is a "subject in which" many students struggle".
What are some alternatives to "subject in which"?
You can use alternatives like "topic where", "area that", or "field in which" depending on the specific context. For example, "area that" could be used as in "This is an "area that" requires further research".
Is it correct to say "subject that" instead of "subject in which"?
While "subject that" can sometimes be used, "subject in which" is generally more appropriate when the following clause provides further detail or context about the subject. "Subject in which" is more formal and precise in many contexts.
What's the difference between "subject in which" and "subject on which"?
"Subject in which" refers to an area or discipline, while "subject on which" refers to a topic that is being written or spoken about. For example, "This is a "subject in which" I excel," versus "This is the "subject on which" I am writing my thesis".
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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested