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
which needs
Grammar usage guide and real-world examplesUSAGE SUMMARY
"which needs" is a perfectly valid phrase in written English.
You can use it to introduce a clause that follows describing a desired action or behavior that is necessary to fulfill a need. For example: "He was given an assignment which needs to be completed by the end of the week."
✓ Grammatically correct
News & Media
Science
Academia
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
Both are described locally as 'richissime', which needs no translation.
News & Media
There's a rack in the armoury which needs describing.
News & Media
"Of course this is a nation which needs strong leadership.
News & Media
There is real public interest which needs to be addressed.
News & Media
It is this bias which needs to be challenged.
News & Media
There's a fat-ballasted rib eye which needs my attention.
News & Media
"It's a problem which needs dealing with now," he said.
News & Media
It is the middle class which needs the most help.
News & Media
"It is a large market which needs content".
News & Media
The problem is one of scale, which needs money.
News & Media
That is the constitutional crisis which needs to be prevented".
News & Media
Expert writing Tips
Best practice
When using "which needs", ensure the clause clearly specifies what is required or necessary. This helps to avoid ambiguity and ensures clarity in your writing.
Common error
Avoid stringing together multiple "which needs" clauses in a single sentence. This can make your writing convoluted and difficult to follow. Break up long sentences into shorter, more manageable ones.
Source & Trust
87%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "which needs" functions as a relative clause marker. It introduces a clause that modifies a noun, indicating a requirement or necessity. As Ludwig AI confirms, it is grammatically sound and widely employed in various contexts.
Frequent in
News & Media
41%
Science
33%
Academia
9%
Less common in
Formal & Business
8%
Reference
0%
Encyclopedias
0%
Ludwig's WRAP-UP
The phrase "which needs" is a versatile relative clause marker used to specify requirements or necessities. Grammatically correct and very common, as verified by Ludwig AI, it appears frequently in news, scientific, and academic writing. While "which needs" maintains a neutral register, its clarity and precision make it suitable for various formal and informal contexts. Related alternatives include "that requires" and "that necessitates", offering similar meanings with slight variations in formality. When using "which needs", ensure the clause clearly defines the specific requirement to avoid ambiguity.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
that requires
Changes the relative pronoun from "which" to "that" and uses the verb "requires" instead of "needs".
that necessitates
Replaces "needs" with the more formal "necessitates".
that calls for
Uses the idiomatic phrase "calls for" to indicate a requirement.
that demands
Employs "demands" to convey a strong sense of necessity.
that is essential
Uses the adjective "essential" to describe the required element.
that is necessary
Similar to "essential" but uses "necessary" instead.
that is required
Uses the passive form "is required" to express necessity.
that would benefit from
Shifts the focus to potential improvement rather than strict necessity.
that could use
A more informal way of suggesting that something would benefit from something else.
which is lacking
Highlights the absence of something needed.
FAQs
How can I use "which needs" in a sentence?
The phrase "which needs" is used to introduce a relative clause that specifies a requirement. For example, "The project "which needs to be completed" by Friday is currently behind schedule".
What are some alternatives to using "which needs"?
You can use alternatives like "that requires", "that necessitates", or "that demands" depending on the level of formality and emphasis you want to convey.
Is it better to use "which needs" or "that needs"?
Both "which needs" and "that needs" are grammatically correct, but "that" is generally preferred in restrictive clauses (clauses essential to the sentence's meaning), while "which" is used in non-restrictive clauses (clauses that add extra information). However, the distinction is becoming less strict in modern usage.
What's the difference between "which needs" and "that requires"?
"Which needs" is a more general way to indicate a necessity. "That requires" is more formal and specific, implying that something actively calls for a particular action or resource. Consider the context to choose the most appropriate phrase.
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
87%
Authority and reliability
4.6/5
Expert rating
Real-world application tested