of which is

USAGE SUMMARY

The phrase "of which is" is correct and can be used in written English.
You could use it to introduce a clause that provides additional information about a noun that was mentioned previously in a sentence. For example: The cats refused to eat the food, of which is made with questionable ingredients.

✓ Grammatically correct

News & Media

Academia

Human-verified examples from authoritative sources

Exact Expressions

56 human-written examples

All of which is understandable.

The New Yorker

All of which is nonsense.

The New York Times

All of which is welcome.

Independent

All of which is happening now.

The Economist

All of which is good, of course.

The New York Times

Some of which is fair enough.

Independent

None of which is a bad thing.

Independent

Human-verified similar examples from authoritative sources

Similar Expressions

4 human-written examples

Both of which were true.

The New Yorker

None of which are bad things, obviously.

Independent

None of which were birthday-related.

The New Yorker

Some of which are likable, some of which are not".

The New York Times

Expert writing Tips

Best practice

Use "of which is" to add non-essential, descriptive information about a noun already mentioned. This helps maintain a formal tone and provides clarity.

Common error

Avoid using "of which is" in simple sentences where a direct relative pronoun like "which" or "that" would be more appropriate and less verbose. Overusing formal constructions can make your writing sound stilted.

Linguistic Context

The phrase "of which is" functions as a relative pronoun introducing a non-restrictive (or non-defining) relative clause. It adds descriptive or supplementary information about a noun already identified in the main clause, as confirmed by Ludwig AI.

Expression frequency: Very common

Frequent in

News & Media

70%

Academia

20%

Science

5%

Less common in

Encyclopedias

2%

Wiki

2%

Formal & Business

1%

Ludwig's WRAP-UP

In summary, "of which is" is a formal phrase used to introduce non-restrictive relative clauses, adding descriptive details about a previously mentioned noun. Ludwig AI confirms its grammatical correctness and common use in formal contexts, particularly in news and academic writing. While it's a valuable tool for precise and detailed expression, it should be used judiciously to avoid sounding overly verbose. Simpler alternatives like "which is" may be more appropriate in less formal settings.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

which is

Omits "of" to create a simpler, more direct relative clause.

that is

Uses "that" instead of "which", often in defining relative clauses.

namely

Introduces specific details or examples, replacing the relative clause with a more direct explanation.

that being

A more formal construction, setting up a condition or explanation.

in other words

Restates the preceding information in a different way for clarification.

which means

Explains the implication or consequence of the preceding statement.

specifically

Highlights particular aspects or details for emphasis.

that said

Introduces a contrasting or qualifying statement.

to be exact

Provides a more precise or accurate version of the preceding information.

put differently

Offers an alternative phrasing of the same concept for better understanding.

FAQs

How can I use "of which is" in a sentence?

Use "of which is" to introduce a non-restrictive clause that provides additional information about a previously mentioned noun. For example, "The book, of which is a first edition, is very valuable".

What's the difference between "of which is" and simply using "which is"?

"Of which is" is more formal and often used when "of" is part of a prepositional phrase related to the noun. "Which is" is generally more common and can be used in most contexts where you want to add extra information.

Can I use "that is" instead of "of which is"?

While "that is" can sometimes replace "of which is", it changes the meaning slightly. "That is" is used for clarification or explanation, whereas "of which is" is used to add descriptive information about a noun.

Is "of which is" considered formal language?

Yes, "of which is" is generally considered formal language and is more commonly found in academic writing, legal documents, or other formal contexts. In more casual writing, simpler alternatives are often preferred.