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
that is does
Grammar usage guide and real-world examplesUSAGE SUMMARY
"that is does" is correct and usable in written English.
It is a common phrase used to provide clarification or explanation. You can use it in a sentence when you want to specify or elaborate on something previously mentioned. For example: "The first step in this process is to gather all necessary materials, that is, the tools and supplies needed." In this sentence, "that is" is used to clarify and specify what is meant by "all necessary materials." It is often used to restate or define something in a different way. Here is another example: "John's favorite hobby, that is, his favorite way to spend his free time, is playing guitar." In this sentence, "that is" is used to further explain what is meant by "John's favorite hobby." It can also be used to introduce a list or give examples. For example: "There are many factors that can contribute to weight gain, such as lack of exercise, poor diet, and genetics, that is, the genes we inherit from our parents." Overall, "that is does" is a useful phrase for providing clarification and adding more detail to a sentence.
✓ Grammatically correct
News & Media
Science
Academia
Alternative expressions(4)
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
59 human-written examples
Mushrooms, bracken and the carcass of whatever that is does your suburban soul good.
News & Media
Spiralling to the planets expresses something in human nature that relieving poverty, however noble a cause that is, does not.
News & Media
This approach has the advantage that is does not require numerical simulations nor does it require the knowledge of the probability density function of the input parameters.
Science
It's perhaps an indication of the ambitions of English soccer's top flight that is does not, in fact, include the word England in its title.
News & Media
Ms. Skala (Libby, that is) does a marvelous rendition, in an evocative Middle European patois, of her grandmother's velveteen, old world charm that sheaths a steel will.
News & Media
As a result, sunlight on Gliese 581d has about 35% the intensity that is does on Mars.
News & Media
Rather this action stems from a post facto determination by the FTC that is does not like the company's definitions.
News & Media
These studies indicate that ATG5 regulates IFN-γ-dependent host protection and it does so through a manner that is does not rely on classical autophagy.
Science
Use of a probit model for analysis is simpler than the logit model, in the sense that is does not require a MH step in the Gibbs sampler.
Tape across the glass will help keep the pieces in place and limit splintering in the event that is does break.
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
1 human-written examples
Is the content of the tweet "real" content--that is, does it mean--or merely a simulacrum of content?
News & Media
Expert writing Tips
Best practice
Use "that is does" to clarify a previously mentioned point, especially when elaborating on its function or effect. This is particularly useful in scientific or technical writing where precision is key.
Common error
Avoid using "that is does" when a simple restatement or definition would suffice. Overusing it can make your writing sound redundant or overly formal. Ensure it adds genuine clarification.
Source & Trust
85%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that is does" functions as a clarifier or elaborator, emphasizing the action or result of something previously mentioned. Ludwig AI confirms its valid use in sentences where specification is needed.
Frequent in
News & Media
40%
Science
35%
Academia
25%
Less common in
Formal & Business
0%
Wiki
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, "that is does" is a grammatically correct phrase used to provide clarification and emphasize the action or result of something previously stated. According to Ludwig, its use is valid and effective for adding detail, especially in formal, scientific, or news contexts. While not overly common, it appears in reputable sources such as The New York Times and Huffington Post. To avoid redundancy, ensure it genuinely adds value to the sentence. Alternative phrases like "that's what it does" or "that is how it works" can be used depending on the intended emphasis.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that's what it does
Changes the structure to emphasize the action or result.
that is how it works
Focuses on the mechanism or process involved.
that's the way it is
Indicates acceptance of a situation or fact.
this is what happens
Highlights the consequence or outcome.
that's the effect
Emphasizes the result or impact.
it functions in that manner
Replaces with a more formal and descriptive explanation of how something operates.
that's how it's designed
Implies a deliberate purpose or intention behind the action.
it achieves that result
Emphasizes the accomplishment of a specific outcome or goal.
that is its function
Specifically identifies the role or purpose of something.
that's the intended outcome
Focuses on the planned or expected result of an action or process.
FAQs
How can I use "that is does" in a sentence?
Use "that is does" to clarify or elaborate on a previous statement by emphasizing the action or result. For example, "The model predicts increased efficiency; "that is does" show a noticeable improvement in processing time."
What are some alternatives to "that is does"?
Depending on the context, you can use alternatives such as "that is how it works", "that's what it does", or "that's the way it is".
Is it grammatically correct to use "that is does"?
Yes, "that is does" is grammatically correct when used to clarify a previous statement by emphasizing its function or effect. Ludwig AI confirms its validity and usability.
In what contexts is "that is does" most appropriate?
"That is does" is best used in formal or technical writing where precise clarification is needed. It appears frequently in news and media, science, and academic contexts.
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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
4.1/5
Expert rating
Real-world application tested