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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
that is active
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that is active" is correct and usable in written English.
You can use it to describe something that is currently in operation or functioning, often in a technical or descriptive context. Example: "The software has several modes, and the one that is active allows for real-time data processing."
✓ Grammatically correct
Science
News & Media
Academia
Encyclopedias
Alternative expressions(5)
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
Choose a break activity that is active, rather than passive.
Wiki
There was still activity in the VTA, the part of the brain that is active when you are in love.
News & Media
Proteolytic activation of the latent complex releases freely diffusible mature TGF-β that is active at distant sites [ 64].
"There's plenty of research that is active.
News & Media
He is the scion of a wealthy Michigan family that is active in Republican politics.
News & Media
They must develop a strategy that is active rather than reactive.
News & Media
"It really has to be a facility that is active year-round".
News & Media
Zanamivir, antiviral drug that is active against both influenza type A and influenza type B viruses.
Encyclopedias
Oseltamivir, antiviral drug that is active against both influenza type A and influenza type B viruses.
Encyclopedias
Miyamoto, S. et al. Coxsackievirus B3 is an oncolytic virus with immunostimulatory properties that is active against lung adenocarcinoma.
Science & Research
Furthermore, the self-schema that is active at our place of work may be quite different from the self-schema that is active at home, and the one that is active when dating might be quite unlike the self-schema that is most active when we marry.
Academia
Expert writing Tips
Best practice
When using "that is active", ensure the context clearly defines what 'active' means in that specific situation. For instance, specify whether it refers to being functionally operational, chemically reactive, or socially engaged.
Common error
Avoid using "that is active" without a clear antecedent. The reader should easily understand what the 'that' refers to. Otherwise, rephrase for clarity.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that is active" functions as a relative clause, modifying a noun by providing additional information about its current state or condition. It specifies which particular item or entity is currently engaged in some action or process, as supported by Ludwig.
Frequent in
Science
40%
News & Media
30%
Academia
15%
Less common in
Encyclopedias
10%
Wiki
3%
Formal & Business
2%
Ludwig's WRAP-UP
In summary, "that is active" is a grammatically sound and versatile relative clause used to describe something currently in operation or engaged in a process. Ludwig confirms its correctness and highlights its prevalence across various domains, particularly science, news, and academia. While its meaning is generally clear, it's essential to ensure the context clarifies the specific meaning of 'active' in each instance. Alternatives such as "which is functioning" or "that is operating" can offer nuanced variations. Remember to avoid ambiguity by ensuring a clear reference for 'that'. Overall, this phrase is a valuable tool for precise and descriptive writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
which is functioning
Focuses on the functional aspect, implying a working state.
which is operating
Similar to 'functioning' but emphasizes the process of operation.
that is in operation
Emphasizes the state of being operational.
that is currently running
Implies a continuous process or execution.
that is in effect
Highlights the validity or enforceability of something.
that is live
Suggests something is currently accessible or being broadcast.
which is underway
Focuses on the progress or continuation of an activity.
that is working
Emphasizes the capability to perform a task.
that is enabled
Highlights that something is activated or permitted to function.
that is engaged
Implies a state of being involved or participating.
FAQs
How can I use "that is active" in a sentence?
Use "that is active" to describe something currently functioning or engaged in a process. For example, "The region "that is active" extends along the eastern border."
What are some alternatives to saying "that is active"?
You can use alternatives like "which is functioning", "that is operating", or "which is underway" depending on the specific nuance you want to convey.
Is there a difference between "that is active" and "which is active"?
While both are grammatically correct, "that is active" is typically used in restrictive clauses (essential to the sentence's meaning), while "which is active" is used in non-restrictive clauses (adding extra information). In practice, they are often used interchangeably.
When is it best to use "that is active" in formal writing?
Use "that is active" in formal writing to provide a precise description of something currently in a state of operation or engagement. Ensure that the subject to which it refers is unambiguous.
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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
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested