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
a guest which
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a guest which" is not correct in standard written English.
The correct relative pronoun to use with "guest" is "who" when referring to people. Example: "She is a guest who has traveled from abroad to attend the conference."
⚠ May contain grammatical issues
News & Media
Science
Wiki
Alternative expressions(20)
a customer which
a subscription which
a buyer who
a customer who
a patron who
a consumer who
a service which
a passenger which
a tenant which
a client who
a business which
a patient which
a visitor which
a constituency which
a customer that
a client that
a patron which
an individual who
an individual that
a prospect 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
5 human-written examples
Their sessions are two hours and cost $85 a guest, which includes Champagne, snacks, a teacher, a waiter, a model and a group photo shoot.
News & Media
Organometallic inclusion is defined by the formation of at least one direct metal carbon bond in an organometallic supramolecular system consisting of a cavity-shaped host and a guest which is partially or deeply included inside the host.
Mr. Shine noted that while "there is nothing in the works," Mr. Cain will continue to appear on Fox as a guest, which he did most recently on Thursday evening.
News & Media
A BNP spokesman added: "Richard Barnbrook has got an official invite in his capacity as a member of the London Assembly and he is allowed to bring a guest, which will be Nick Griffin.
News & Media
Tinchy Stryder is a guest, which gives the others – host Rob Brydon especially – the opportunity to be consciously uncool/old/groansome. Rob is looking forward to hanging with Tinchy's crew and getting on the decks, because he loves a regatta, hoho, groan.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
55 human-written examples
He had previously announced an appearance from a special guest, which was later revealed to be Cyrus.
Wiki
(Mr. Zenón was billed as a special guest, which suggests that this might be a passing affiliation).
News & Media
Each performance will feature a special guest, which in past years included Gabriel Byrne, Christine Quinn, Colum McCann, Susan McKeown, Michael Patrick McDonald and Bill Whelan.
News & Media
The service also announced the launch of a new feature, Guest, which allows audience members to join a broadcaster live in video.
News & Media
We were all soaking in the Mekas brothers' film-making, Warren Sonbert was a frequent dinner guest, which you can see in the photos, as was Adolfas Mekas.
News & Media
The song "See My Vest" sung by Mr. Burns is a parody of "Be Our Guest", which is sung by Jerry Orbach in the film Beauty and the Beast.
Wiki
Expert writing Tips
Best practice
When referring to people, use "who" or "that" instead of "which" after the noun "guest". For example, use "a guest who" or "a guest that".
Common error
Avoid using "which" to refer to people. "Which" is typically used for objects, animals, or concepts, not for individuals. Using "who" or "that" ensures grammatical correctness when referring to guests.
Source & Trust
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a guest which" functions as part of a relative clause, but it incorrectly uses the relative pronoun "which" to refer to a person. According to Ludwig AI, the correct pronouns to use are "who" or "that".
Frequent in
News & Media
40%
Wiki
20%
Science
20%
Less common in
Formal & Business
0%
Academia
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "a guest which" is grammatically incorrect. As Ludwig AI points out, the relative pronoun "which" should not be used to refer to people; instead, use "who" or "that". While the phrase appears in various contexts, including News & Media and Wiki sources, its incorrect usage makes it unsuitable for formal writing. Correct alternatives include "a guest who" or "a guest that", ensuring both grammatical accuracy and clarity. Remember to use "who" when the subject is a person.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
a guest who
Replaces 'which' with 'who', the correct relative pronoun for people.
a guest that
Replaces 'which' with 'that', an acceptable relative pronoun for people in some contexts.
the guest who
Adds 'the' to specify a particular guest, using the correct relative pronoun 'who'.
the guest that
Adds 'the' to specify a particular guest, using 'that' as the relative pronoun.
a visitor who
Substitutes 'guest' with 'visitor' and uses the correct relative pronoun 'who'.
an attendee who
Replaces 'guest' with 'attendee' and uses the correct relative pronoun 'who'.
a participant who
Substitutes 'guest' with 'participant' and uses the correct relative pronoun 'who'.
an individual who
Replaces 'guest' with 'individual' and uses the correct relative pronoun 'who'.
someone who was a guest
Rephrases to emphasize the person and uses the correct relative pronoun 'who'.
the person who was a guest
Rephrases to specifically identify the person and uses the correct relative pronoun 'who'.
FAQs
How to correctly refer to a guest in a relative clause?
When using a relative clause to describe a guest, use "who" or "that" instead of "which". For example, "the guest who arrived late" or "the guest that spoke first" are grammatically correct.
Is it ever correct to use "which" to refer to a guest?
No, it is not grammatically correct to use "which" to refer to a person. Use "who" or "that" instead. Saying "a guest which" is incorrect.
What can I say instead of "a guest which"?
The correct alternatives are "a guest who" or "a guest that". The choice depends on the context and desired level of formality.
What's the difference between "a guest who" and "a guest which"?
"A guest who" is grammatically correct because "who" is used to refer to people. "A guest which" is incorrect because "which" is generally used for objects or animals, not people.
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
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested