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
for which I
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "for which I" is correct and usable in written English. You can use it when referring to a specific reason or situation that you are explaining or justifying. Example: "There are several reasons for which I believe this approach is effective." Alternative expressions include "for which I am," "for which I have," and "for which I can."
✓ Grammatically correct
News & Media
Science
Formal & Business
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
For which I remain grateful.
News & Media
Goodnight, branded swag for which I swoon.
News & Media
For which I, of course, apologise.
News & Media
A careless lapse, for which I apologize.
News & Media
These are noble undertakings for which I am deeply grateful.
News & Media
"I have 500,000 refugees for which I am responsible.
News & Media
The job for which I was being paid.
News & Media
I haven't blogged about the National Popular Vote initiative for a while (not since June!), for which I apologize — or for which I acknowledge your gratitude, whichever applies.
News & Media
The rest is a hash, a mishmash for which I deserve to be mercilessly handled.
News & Media
(The work by Bloomberg, for which I am also a commentator, has attracted some controversy.
News & Media
Probably the operation saved my life, for which I am grateful.
News & Media
Expert writing Tips
Best practice
Ensure that the noun immediately preceding the phrase is indeed the 'thing' you are acting upon or feeling toward.
Common error
Avoid using "for which I" when referring to people. If you are referring to a human antecedent, you must use "<a href="/s/for+whom+I" target="_blank" rel="alternative">for whom I" to remain grammatically accurate.
Source & Trust
93%
Authority and reliability
4.9/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "for which I" serves as a relative clause introducer. In this construction, the preposition 'for' is 'pied-piped' to the front of the relative pronoun 'which'. As noted in Ludwig AI, this allows for a seamless transition from an antecedent noun to a subjective action, maintaining a high degree of syntactic cohesion.
Frequent in
News & Media
55%
Science
25%
Formal & Business
20%
Less common in
Social Media
5%
Wiki
8%
Informal
10%
Ludwig's WRAP-UP
The phrase "for which I" is a hallmark of sophisticated English writing. Based on extensive examples from Ludwig, it is clear that this construction is favored by journalists, scientists, and academics to create clear links between actions and their underlying causes or objects. While it may feel overly formal for casual text messages, it is the correct choice for any situation requiring a professional or authoritative tone. Ludwig AI confirms its grammatical validity and highlights its versatility in expressing everything from personal gratitude to professional accountability.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
for which reason I
Explicitly identifies the preceding clause as the specific cause.
because of which I
Shifts the emphasis toward causality rather than just association.
whereby I
Suggests a method or process through which the action is achieved.
that I am responsible for
A more informal construction that places the preposition at the end.
for whom I
Necessary alternative when the antecedent is a person rather than an object or concept.
to which I
Changes the preposition to indicate direction or attachment instead of purpose.
in which I
Indicates a setting or context rather than a reason.
hence I
A more concise, adverbial way to show consequence.
for this I
Uses a demonstrative pronoun to start a new sentence or independent clause.
owing to which I
A highly formal substitute for because of which.
FAQs
How do I use "for which I" in a sentence?
You use it to link a noun to a subsequent action that relates to that noun. For example: "The project was a task "for which I" felt uniquely prepared."
Is it better to say "for which I" or "<a href="/s/that+I+am+for" target="_blank" rel="alternative">that I am for"?
"for which I" is significantly more formal. In academic or professional contexts, "for which I" is preferred over constructions that end in prepositions.
What is the difference between "for which I" and "<a href="/s/for+whom+I" target="_blank" rel="alternative">for whom I"?
The choice depends on the antecedent. Use "for which I" for objects, ideas, or things, and use "<a href="/s/for+whom+I" target="_blank" rel="alternative">for whom I" when referring to a person or group of people.
Can I replace "for which I" with "<a href="/s/whereby+I" target="_blank" rel="alternative">whereby I"?
Only if you are describing a process or system. While "for which I" implies a reason or purpose, "<a href="/s/whereby+I" target="_blank" rel="alternative">whereby I" implies a mechanism of action.
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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
93%
Authority and reliability
4.9/5
Expert rating
Real-world application tested