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 served as
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that served as" is correct and usable in written English.
It can be used to indicate a function or role that something played in a particular context. Example: "The old factory that served as a community center was a vital part of our neighborhood."
✓ 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
60 human-written examples
Banks in that era issued "notes" that served as currency.
News & Media
We walked through the dunes to a series of tents that served as a field hospital.
News & Media
They waited as men prayed, bowing their heads on Egyptian flags that served as prayer rugs.
News & Media
You've owned some of the animals that served as models for the characters in your books.
News & Media
The region would have been an oasis that served as a refuge during dry periods.
News & Media
It includes the house that served as Washington's headquarters and other artifacts of the Revolution.
Encyclopedias
My mother was dubious, especially about the separate building that served as a shared bathroom.
News & Media
(It featured front wheels nailed to a 4x4 that served as the front axle.
News & Media
Victor Zamora, thirty-three, sat on a stone that served as a bench, smoking a cigarette.
News & Media
On Tuesday, firefighters demolished a former factory that served as seasonal housing for many migrants.
News & Media
An osprey sat on top of a long stick that served as a mooring.
News & Media
Expert writing Tips
Best practice
When using "that served as", ensure the noun following "as" clearly defines the role or purpose being described. For instance, "the building that served as a hospital" is clearer than "the building that served as something."
Common error
Avoid using "that served as" when a more direct verb would be clearer. For example, instead of "the tool that served as a hammer", consider "the tool used as a hammer" or even simply "the hammer".
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that served as" functions as a relative clause, modifying a noun by specifying its role or purpose in a given context. It connects a descriptive clause to a noun, providing information about its function. As Ludwig AI indicates, this phrase is grammatically correct and widely used.
Frequent in
News & Media
37%
Science
35%
Encyclopedias
4%
Less common in
Wiki
2%
Formal & Business
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "that served as" is a versatile relative clause used to define the function or role of a noun within a specific context. Ludwig AI confirms its grammatical correctness and frequent usage. Predominantly found in News & Media and Scientific sources, it maintains a neutral to formal register. To enhance clarity, ensure the noun following "as" precisely defines the described role. By avoiding ambiguity and considering direct verb alternatives, writers can effectively use "that served as" to provide meaningful context to their writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
which functioned as
Replaces "served" with "functioned", emphasizing the operation or activity performed.
which acted as
Substitutes "served" with "acted", focusing on the behavior or conduct in a particular role.
that was employed as
Uses "employed" instead of "served", highlighting the use or application of something for a specific purpose.
that was utilized as
Employs "utilized" in place of "served", stressing the practical use or exploitation of something.
that fulfilled the role of
Expands the phrase to emphasize the role or function being performed.
which provided the function of
Focuses on the provision of a function, rather than the act of serving.
that operated in the capacity of
Uses a more formal tone to indicate the role or capacity in which something functioned.
that constituted
Highlights the composition or formation of something, rather than its function.
that effectively worked as
Emphasizes the effectiveness of something in performing a particular function.
that was designed to be
Focuses on the intended purpose or design of something.
FAQs
How to use "that served as" in a sentence?
Use "that served as" to describe the function or purpose something fulfilled in a particular context. For example, "The old factory "that served as" a community center is now being renovated".
What can I say instead of "that served as"?
Alternatives include "which functioned as", "that acted as", or "that was used as", depending on the specific nuance you want to convey.
Is there a more formal way to say "that served as"?
Yes, you can use phrases like "that operated in the capacity of" or "that fulfilled the role of" for a more formal tone.
What's the difference between "that served as" and "that was used as"?
"That served as" often implies a primary or intended purpose, while "that was used as" can suggest a more ad-hoc or secondary application. For example, a tool "that served as" a hammer was designed for that purpose, while a rock "that was used as" a hammer was not.
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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