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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
a customer which
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'a customer which' is correct and usable in written English.
You can use it when referring back to a specific customer previously mentioned in the sentence. For example, "The store recently welcomed a customer which bought several items from the store."
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(20)
a customer who
a client who
a customer that
an individual who
a patron who
an individual that
a buyer who
a consumer who
a client that
a patron which
a patient which
a guest which
a service which
a tenant which
a constituency which
a passenger which
a subscription which
a business which
a prospect which
a visitor which
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
26 human-written examples
"A while ago, an unlicensed attari sold madder instead of cinnamon to a customer, which caused poisoning.
News & Media
(She said she was fired in February when the management accused her of overcharging a customer, which she denied).
News & Media
"I'm not really selling myself to a customer, which I was doing when I was building their home," Bruce Leep said.
News & Media
Every street corner has a shoe-shine man, always with a customer, which thankfully means they don't feel the need to tout (unlike in Asia, where they try to shine your shoes even if you're wearing flip-flops).
News & Media
Usually it took one or two minutes to gather all of the information from a customer, which is typically a small business seeking help with using Intuit's accounting software.
News & Media
If all research income, including QR, depends on winning grants and contracts, this will make it more unattractive - perhaps impossible - to do curiosity-driven research that does not have a customer, which QR has in the past enabled.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
34 human-written examples
The network effect, according to Wikipedia, "causes a good or service to have a value to a potential customer which depends on the number of other customers who own the good or are users of the service".
News & Media
For every service rendered by a firm there is a target customer, which needs to be identified in order to design a business strategy accordingly.
Wiki
Kirsner knows that a happy customer is a return customer, which is why she introduced the Ritz-Carlton's STARS program, reserved exclusively for top trav- el agencies working with the company.
News & Media
Now he is spearheading Microsoft's fight against US government demands for access to emails from a Microsoft customer which are currently sitting on a server in Dublin, Ireland, as part of a narcotics investigation.
News & Media
Bango provided a short statement, noting that Amazon is now a Bango customer, which makes it the third major customer to sign up for the mobile payments platform.
News & Media
Expert writing Tips
Best practice
When referring to a person, prefer using "who" instead of "which" for better grammatical clarity. While "a customer which" is not incorrect, "a customer who" often sounds more natural and appropriate.
Common error
Avoid using "which" when referring to people. "Which" is typically used for inanimate objects or animals. Using "who" clarifies that you are referring to a person.
Source & Trust
80%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a customer which" functions as a noun phrase followed by a relative clause, modifying the noun "customer". The relative clause provides additional information about the customer. Ludwig's examples showcase its usage across various contexts.
Frequent in
News & Media
75%
Science
15%
Wiki
10%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "a customer which" is grammatically correct but less preferred than "a customer who" when referring to people. While usable, especially in certain contexts, it's important to consider the audience and level of formality. According to Ludwig, the phrase is common in News & Media and Science, but less so in formal business settings. When writing, using "who" for people provides better clarity, even though Ludwig AI confirms that the phrase is perfectly usable. Alternatives include "a customer that" and "a client who", depending on the specific context and nuance you wish to convey.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
a client who
Replaces "which" with "who", more grammatically appropriate for referring to a person.
a customer that
Uses "that" instead of "which", providing a slightly less formal tone.
a patron who
Substitutes "customer" with "patron", implying a more loyal or regular customer.
an individual that
Replaces "customer" with "individual", offering a more generic and formal tone.
a buyer who
Uses "buyer" instead of "customer", focusing on the act of purchasing.
a consumer who
Employs "consumer" in place of "customer", emphasizing the consumption aspect.
a client that
Combines "client" with "that", resulting in a less formal tone than "client who".
an account which
Substitutes "customer" with "account", appropriate in business contexts.
a subscriber who
Uses "subscriber" instead of "customer", specific to subscription-based services.
a user who
Replaces "customer" with "user", common in the context of software or services.
FAQs
When should I use "a customer who" instead of "a customer which"?
When referring to a person, it's generally better to use "who" instead of "which". "Who" is a relative pronoun specifically used for people, while "which" is typically used for things. Therefore, "a customer who" is usually the more appropriate choice.
What are some alternative ways to phrase "a customer which"?
You could use phrases like "a client who", "a customer that", or "an individual who", depending on the context and desired level of formality.
Is "a customer which" grammatically incorrect?
While not strictly incorrect, using "which" to refer to a person is generally discouraged in favor of "who". Ludwig AI confirms that "a customer which" is usable, but it's important to consider the audience and context. In formal writing, "who" is almost always preferred.
Can I use "that" instead of "which" in the phrase "a customer which"?
Yes, "that" is often a suitable alternative. "A customer that" is grammatically correct and can be used in many contexts, especially in less formal writing. However, "who" remains the most appropriate choice when referring to a person.
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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
80%
Authority and reliability
4.1/5
Expert rating
Real-world application tested