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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
which i
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "which I" is correct and usable in written English.
It can be used to introduce a relative clause that provides additional information about a noun mentioned earlier in the sentence. Example: "I have a book which I found at the library."
✓ Grammatically correct
News & Media
Alternative expressions(11)
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
Which I didn't do.
News & Media
Which I did enjoy.
News & Media
"Which I told her.
News & Media
Which I didn't".
News & Media
Which I could not".
News & Media
"Which I don't".
News & Media
Which I couldn't.
News & Media
Which I like.
News & Media
Which I did.
News & Media
Which I saw.
News & Media
Which I didn't complete.
News & Media
Expert writing Tips
Best practice
Use "which I" to add non-essential, descriptive information to a sentence. Remember to separate the clause with commas if it's non-restrictive.
Common error
Avoid using "that I" when "which I" is more appropriate. "Which I" is often used for non-restrictive clauses that add extra information, while "that I" is used for restrictive clauses that are essential to the sentence's meaning.
Source & Trust
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
"Which I" functions as a relative pronoun introducing a non-restrictive clause. It adds supplementary information to the main clause without being essential to its core meaning. Ludwig AI validates its grammatical correctness and frequent use.
Frequent in
News & Media
90%
Formal & Business
5%
Science
3%
Less common in
Encyclopedias
1%
Wiki
0.5%
Reference
0.5%
Ludwig's WRAP-UP
The phrase "which I" is a grammatically sound and frequently used relative clause starter. Ludwig AI confirms its correctness and commonality, especially in news and media contexts. It serves to add non-essential, descriptive information to a sentence. While versatile, writers should be mindful of the distinction between "which I" and "that I", using the former for non-restrictive clauses and the latter for essential ones. Alternatives include "that I", "and I", depending on the intended meaning and context.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that I
Uses "that" instead of "which" to introduce the relative clause.
and I
Connects the preceding statement with a coordinate clause using "and".
what I
Introduces a noun clause specifying "what" the speaker is referring to.
as I
Indicates a simultaneous action or state.
for which I
Emphasizes the reason or cause for a following statement.
in which I
Specifies a particular situation or circumstance.
of which I
Denotes possession or belonging.
where I
Indicates a location or place relevant to the preceding statement.
when I
Specifies a time or instance.
since I
Indicates a reason or a time from which something has been true.
FAQs
How can I use "which I" in a sentence?
Use "which I" to introduce a non-restrictive clause that adds extra, non-essential information to a sentence. For example, "I bought a car, "which I love", yesterday."
When should I use "that I" instead of "which I"?
Use "that I" when introducing a restrictive clause that is essential to the meaning of the sentence. For example, "The book "that I borrowed" from the library is due next week."
What are some alternatives to using "which I"?
Depending on the context, you can use alternatives such as "that I", "and I", or rephrase the sentence to avoid the relative clause altogether.
Is it grammatically correct to start a sentence with "which I"?
Starting a sentence with "which I" is generally grammatically incorrect. "Which I" typically introduces a clause that modifies a preceding noun or statement.
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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
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested