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
as a primary source of
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "as a primary source of" is correct and usable in written English.
It can be used when discussing the main origin or basis of information, data, or resources in a particular context. Example: "The library serves as a primary source of historical documents for researchers."
✓ Grammatically correct
News & Media
Science
Encyclopedias
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
57 human-written examples
There are drawbacks, though, to relying on the generators as a primary source of power.
News & Media
Sixteen to twenty-four year olds use social media as a primary source of science information.
News & Media
For many of her readers, Ms. Finke's Web site has supplanted traditional media as a primary source of strike news.
News & Media
If China could replace coal with oil as a primary source of energy, emissions would drop by one third.
News & Media
Jean Vendome names René Lalique, the Art Nouveau jewelry designer and glass master, as a primary source of inspiration.
News & Media
Google, with its instant access to factoids of dubious veracity, is singled out as a primary source of the malaise.
News & Media
And it is worth pointing out that they serve as a primary source of information for many viewers.
News & Media
MODERN musicians know better than to rely on selling copies of their tunes as a primary source of income.
News & Media
Jones' piece also overlooks the artists already using video games, both as a primary source of inspiration, and an artistic medium.
News & Media
Only in the last couple of years has OMA been able to rely on architectural design, along with urban planning, as a primary source of income.
News & Media
Manufacturing showed steady growth from the mid-19th to the late 20th century, during which time it emerged as a primary source of income for the state.
Encyclopedias
Expert writing Tips
Best practice
When using "as a primary source of", ensure that the source you are referring to is indeed the main or most important origin, rather than just one of many sources. This strengthens the accuracy and impact of your statement.
Common error
Avoid using "as a primary source of" when the source is only one of several equally important contributors. Using language that accurately reflects the source's significance will improve your writing's credibility.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "as a primary source of" functions as a prepositional phrase that modifies a noun or noun phrase. It identifies the main origin, basis, or resource for something. According to Ludwig, this phrase is grammatically correct and usable in written English.
Frequent in
Science
37%
News & Media
31%
Wiki
4%
Less common in
Encyclopedias
2%
Formal & Business
2%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "as a primary source of" is a versatile and grammatically sound prepositional phrase used to identify the main origin or basis of something. Ludwig AI confirms its correctness and usability in written English. It is commonly found in news, scientific, and academic writing, indicating a neutral to formal register. When employing this phrase, it's crucial to ensure the source genuinely represents the main origin rather than just one of many contributors. While alternatives exist, such as "as a main source of" or "as a key resource for", the core meaning remains consistent: to pinpoint the principal origin or foundation.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
as a main origin of
Emphasizes the origin aspect, replacing 'primary' with 'main' to highlight the fundamental nature of the source.
as a key resource for
Highlights the 'resource' aspect, suggesting the subject is essential or very important.
as a principal foundation for
Stresses the foundational aspect, indicating the subject acts as a groundwork for something else.
as a fundamental basis of
Underscores the basic or underlying nature of the subject.
as a leading generator of
Focuses on the generative aspect, portraying the subject as a creator or producer of something.
as a chief provider of
Emphasizes the provision aspect, implying the subject is a major supplier of something.
as a foremost contributor to
Highlights the subject's significant contribution to something else.
as a central component of
Highlights the importance as being a constituent element.
as an essential element in
Stresses the indispensable nature of the subject in relation to something else.
as a critical input for
Emphasizes the input aspect, indicating the subject is vital for a process or system.
FAQs
How can I use "as a primary source of" in a sentence?
You can use "as a primary source of" to indicate the main origin or basis of something, such as "The library serves as a primary source of historical documents for researchers."
What are some alternatives to "as a primary source of"?
Alternatives include "as a main source of", "as a key resource for", or "as a principal foundation for", depending on the specific context.
Is it appropriate to use "as a primary source of" in formal writing?
Yes, "as a primary source of" is suitable for formal writing, especially in academic, scientific, or business contexts where precision and clarity are important.
What's the difference between "as a primary source of" and "as a secondary source of"?
"As a primary source of" indicates the original or main origin, while "as a secondary source of" implies the information is derived from another source, interpreting or analyzing the primary source.
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
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested