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 part which
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "the part which" is correct and usable in written English.
It can be used to specify a particular section or element of something being discussed. Example: "I want to focus on the part which explains the main argument of the essay."
✓ Grammatically correct
News & Media
Science
Alternative expressions(2)
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
The most effective part of the act is the part which involves his daughter Margaret.
News & Media
Rather than going off to college, Christensen took the part, which was not a popular decision in his household.
News & Media
"There was no attempt to conceal the part, which we have been running since April," he said.
News & Media
From thousands of people I got down to the last 10 and then got the part, which launched my career.
News & Media
But the part which has gotten under people's skin is the experiment which gave the book its name.
News & Media
It's a chicken and egg situation- and this is the part which is difficult for people to understand.
News & Media
A spokeswoman for Boeing explained the function of the part, which controls the motion of flaps on the wing.
News & Media
They found the bit of the brain which controls the left hand was slightly thicker than the part which controls the right hand.
News & Media
The part, which Ms. Palumbo shares on alternating nights with Irida Herri, a graduate student from Albania, demands vocal ability as well as mature acting skills.
News & Media
Fassbender is said to be in early negotiations for the part, which has already been turned down by Christian Bale and Leonardo DiCaprio.
News & Media
The part, which matched an unlabeled conductor's score discovered earlier this summer, suggested that Britten's long-lost version might have been found.
News & Media
Expert writing Tips
Best practice
Consider using more concise alternatives like "the section that" or simply rephrasing to eliminate the need for "the part which" for improved clarity.
Common error
Avoid using "the part which" in simple sentences where a direct subject-verb construction is clearer. For example, instead of "The part which I liked was the ending", try "I liked the ending."
Source & Trust
81%
Authority and reliability
4.2/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the part which" functions as a relative clause, introducing additional information about a specific "part". This is highlighted by Ludwig, showing many examples where it introduces clauses that define or describe a particular section or element.
Frequent in
News & Media
30%
Science
30%
Wiki
10%
Less common in
Formal & Business
10%
Encyclopedias
10%
Reference
10%
Ludwig's WRAP-UP
In summary, "the part which" is a grammatically sound and frequently used phrase to specify a particular section or element. Ludwig's analysis confirms its correctness and wide applicability, as examples show. While its usage spans various registers, it often serves to isolate a specific aspect of a subject. Consider more concise alternatives like "the section that" for improved clarity, as noted in the writing guidance.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
the section that
Replaces "part" with "section" offering a slightly different nuance while maintaining the core meaning.
the portion that
Replaces "part" with "portion", indicating a specific amount or share.
the piece that
Replaces "part" with "piece", often used for physical objects or information.
the element that
Substitutes "part" with "element", focusing on a component within a larger whole.
the segment that
Substitutes "part" with "segment", indicating a distinct portion of something.
the aspect that
Uses "aspect" instead of "part", highlighting a particular feature or characteristic.
the component that
Uses "component" instead of "part", emphasizing the role of a specific piece.
the area that
Replaces "part" with "area", referring to a specific region or domain.
that aspect of
Rephrases to focus on a specific aspect, offering a more direct construction.
which part
Inverts the structure into a question format, suitable for inquiries.
FAQs
How can I use "the part which" in a sentence?
Use "the part which" to specify a particular section or element of something you are discussing. For example, "The part which I found most interesting was the conclusion."
What can I say instead of "the part which"?
You can use alternatives like "the section that", "the element that", or "the portion that" depending on the context.
Is "the part which" formal or informal?
"The part which" is generally considered neutral in tone and can be used in both formal and informal contexts, although more concise alternatives might be preferred in formal writing.
What is the difference between "the part which" and "that part that"?
"The part which" and "that part that" are similar, but the former is generally considered more grammatically sound. Using "which" is often preferred in formal writing, while "that part that" can sound redundant. Consider using alternatives like "the section that".
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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
81%
Authority and reliability
4.2/5
Expert rating
Real-world application tested