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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
that functions as
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that functions as" is correct and usable in written English.
You can use it to describe the role or purpose of something in a sentence, often in a technical or formal context. Example: "The enzyme that functions as a catalyst speeds up the chemical reaction."
✓ Grammatically correct
News & Media
Science
Academia
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
Just inside the front door is a hallway that functions as an elegant mudroom.
News & Media
"Quite the contrary; we think this is a place that functions as a family destination.
News & Media
Their answer was to create a dating site that functions as an intermediary.
News & Media
A receptor tyrosine kinase that functions as a heterodimerization partner with other Erbb family members.
Science & Research
"The wall installation is a hybrid approach that functions as both sculpture and drawing.
News & Media
Skywalker is the Drosophila homologue of TBC1d24 that functions as a RabGAP for Rab3550.
Science & Research
A melodic entity that functions as an element in a larger whole is called a theme.
Encyclopedias
The digested wastewater is pressed into a product that functions as a soil amendment and fertilizer.
News & Media
The CFTR gene is a protein that functions as a chloride channel.
Academia
NAT, a human complex containing Srb polypeptides that functions as a negative regulator of activated transcription.
Academia
The "Muslim" has come to be a hollowed, emptied term that functions as a trigger for white anxiety.
News & Media
Expert writing Tips
Best practice
Use "that functions as" to clearly define the role or purpose of a specific element or component within a larger system or context. This is especially effective in technical or formal writing.
Common error
Avoid using "that functions as" in simple sentences where a more direct verb would suffice. For example, instead of saying 'This room that functions as a study', consider 'This room serves as a study' or simply 'This room is a study'.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that functions as" is a relative clause functioning as an adjectival modifier. It provides additional information about the noun it modifies, specifying its role or purpose. Ludwig provides numerous examples of this usage across diverse contexts.
Frequent in
News & Media
30%
Science
29%
Academia
13%
Less common in
Encyclopedias
5%
Wiki
1%
Formal & Business
0%
Ludwig's WRAP-UP
In summary, the phrase "that functions as" is a versatile relative clause used to define the role or purpose of a noun. Ludwig AI indicates that it is grammatically correct and widely used across various contexts, especially in news, science, and academia. While generally neutral to formal, it's important to avoid overuse in simple sentences where more direct language could suffice. Alternatives like "which serves as" or "which acts as" may be suitable depending on the context.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
which serves as
Replaces "functions" with "serves", emphasizing the action of providing a service or purpose.
which acts as
Substitutes "functions" with "acts", highlighting the performance of a specific role or action.
that operates as
Replaces "functions" with "operates", focusing on the method or way something works.
which works as
Uses "works" instead of "functions", providing a more informal alternative.
that is employed as
Replaces "functions" with "is employed", giving a more formal tone and emphasizing intentional use.
that is utilized as
Similar to "is employed as", but highlights the practical application of something.
that fulfills the role of
Replaces the entire phrase with a more explicit description of purpose or function.
that has the function of
Focuses on the inherent function or purpose something possesses.
that provides the function of
Emphasizes that something actively gives a certain function.
that is designed to
Shifts the focus to the intention behind something's design or purpose.
FAQs
How can I use "that functions as" in a sentence?
Use "that functions as" to specify the role or purpose of something. For example, "The hallway "that functions as" an elegant mudroom" or "a protein "that functions as" a chloride channel".
What are some alternatives to "that functions as"?
Alternatives include "which serves as", "which acts as", or "that operates as". The best choice depends on the specific context and desired level of formality.
Is "that functions as" formal or informal?
"That functions as" leans towards formal usage, often found in technical or academic writing. Simpler alternatives may be more suitable for informal contexts.
When is it best to use "that functions as" over a simpler verb?
Use "that functions as" when you want to emphasize the specific role or purpose something fulfills, especially if it's a key aspect of your explanation. Avoid it when a simpler verb like 'is' or 'acts' would be equally clear.
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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