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
that runs
Grammar usage guide and real-world examplesUSAGE SUMMARY
"that runs" is a correct and usable part of a sentence in written English.
It is typically used as a relative clause to provide more information about a noun or pronoun in the sentence. Example: The river, that runs through the city, is a popular spot for fishing and boating.
✓ Grammatically correct
News & Media
Academia
Science
Wiki
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
60 human-written examples
It's MacBook Air that runs Windows.
News & Media
Or a function that runs backwards?
dyn_all.com Command procedure that runs the program.
Academia
That runs through the whole system.
News & Media
Yes, says the organization that runs it.
News & Media
Two options are available one that runs on electrons and one that runs on protons.
News & Media
The team that runs best wins?
News & Media
pacman.py The main file that runs Pacman games.
She shows us a subway ad that runs in Philadelphia.
She doesn't know the computer language that runs the machines.
News & Media
"This is an operation that runs on proximity to people.
News & Media
Expert writing Tips
Best practice
In technical writing, use "that runs" to clearly identify the operating environment of a program or hardware.
Common error
Avoid using "that runs" when the antecedent is plural. For example, use "the systems that run" instead of "the systems "that runs"".
Source & Trust
89%
Authority and reliability
4.9/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that runs" serves as a restrictive relative clause consisting of the relative pronoun "that" and the third-person singular verb "runs". According to Ludwig AI, it is primarily used to specify or identify a particular noun by describing its function, movement, or location. In many Ludwig examples, it acts as the bridge between a machine and its operating software.
Frequent in
News & Media
50%
Academia
25%
Wiki
15%
Less common in
Science
5%
Social Media
3%
Formal & Business
2%
Ludwig's WRAP-UP
In conclusion, "that runs" is a robust and indispensable relative clause in the English language. Ludwig AI shows that it is used with high frequency to describe everything from physical paths and liquid movement to software execution and abstract thematic consistency. Whether you are writing a technical manual for a program "that runs" on a server or a poetic description of a river "that runs" through a valley, this phrase provides a clear and grammatically sound way to link a subject to its action. Its widespread use across prestigious outlets like The New York Times and MIT highlights its reliability as a standard linguistic tool for both descriptive and functional writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
which operates
Uses a more formal verb often applied to machinery or organizations.
that functions
Focuses on the operational capability of the subject.
running
A present participle form that can often replace the relative clause for conciseness.
which goes
Commonly used for physical routes like roads or rivers.
that executes
Specific to computing and software contexts.
which flows
Specifically for liquids or abstract concepts like time and ideas.
that powers
Emphasizes the underlying source of energy or logic.
extending through
Better suited for physical or thematic continuity.
that manages
Focuses on the administrative or controlling aspect of the subject.
which stretches
Focuses on the physical distance or span of the subject.
FAQs
How to use "that runs" in a sentence?
What can I say instead of "that runs"?
Depending on the context, you can use "which operates", "that functions", or simply "running".
Which is correct, "that runs" or "which runs"?
Both are often correct, but "that runs" is generally preferred for restrictive clauses that are essential to the sentence's meaning, while "which runs" is often used for non-essential info.
Is "that runs" appropriate for formal writing?
Yes, it is a neutral and standard phrase frequently found in "academic writing" and professional journalism.
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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
89%
Authority and reliability
4.9/5
Expert rating
Real-world application tested