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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 was
Grammar usage guide and real-world examplesUSAGE SUMMARY
The part of the sentence 'that is was' is not correct and usable in written English.
You can not use it. Example: I thought the apple was tasty, but that is was not true.
⚠ May contain grammatical issues
News & Media
Science
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
47 human-written examples
How, that is, was America to deploy its extraordinary power?
News & Media
It's not so much that All for One was terrible, more that is was underwhelming.
News & Media
It (syncing Google contacts and calendars unofficially through your wonderful free service, that is) was fun while it lasted.
News & Media
The fact that is was best-of-five sethefinalhe finaddsdds to the magnitude of his triumph.
News & Media
Revenue was up 8% in 2005; operating profit (earnings before interest and taxes, that is) was $437 million, up 10%.
News & Media
After all, the screen (the TV screen, that is) was entering the American home like gangbusters.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
13 human-written examples
Clinton Billll, that is — is right.
News & Media
"It's something that's been there.
News & Media
These are lives that are being saved".
News & Media
Yeah, that's been great.
News & Media
It's something that's been overlooked.
News & Media
Expert writing Tips
Best practice
Always double-check the structure when using "that", "is", and "was" together. Ensure "that" is followed by a subject (like "it") to create a grammatically sound sentence.
Common error
Avoid combining "that is" directly with a past tense verb form. Instead of saying "that is was", restructure the sentence to include the proper subject and verb conjugation, such as "that it was".
Source & Trust
82%
Authority and reliability
1.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that is was" is primarily a grammatical error. Ludwig AI identifies it as incorrect in standard English. It often appears when attempting to connect a subordinate clause with a past tense verb incorrectly.
Frequent in
News & Media
45%
Science
35%
Formal & Business
10%
Less common in
Encyclopedias
5%
Wiki
3%
Reference
2%
Ludwig's WRAP-UP
The phrase "that is was" is generally considered grammatically incorrect in standard English. As Ludwig AI points out, this construction typically arises from an error in sentence structure when attempting to combine "that is" with a past tense verb. While examples exist across various sources, including news and media, they represent deviations from standard grammar. To correct this, consider alternatives such as "that it was" or "that was", depending on the intended meaning. Always ensure the sentence structure includes a subject between "that" and "was" to maintain grammatical accuracy. Avoiding this phrase in formal writing will enhance clarity and credibility.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
that it was
Corrects the grammatical structure by using the proper conjunction "it" to link the clauses.
that is what it was
Emphasizes the nature or identity of something in the past, providing additional clarification.
the fact that it was
Highlights the reality of a past event, emphasizing its factual existence.
that's what it was
Uses a contraction to make the sentence more conversational while maintaining grammatical correctness.
that was
Simplifies the phrase by omitting "is", focusing solely on the past tense state.
it was that
Inverts the structure to create a cleft sentence, emphasizing a specific element.
that is to say, it was
Adds clarification or rephrasing while ensuring proper grammar and flow.
it turned out to be
Expresses a discovery or realization about something's nature in the past.
it happened to be
Indicates a chance or coincidental aspect of a past situation or event.
the reality was that
Stresses the actual state or circumstances, often contrasting with a prior belief.
FAQs
Why is "that is was" considered grammatically incorrect?
In standard English, "that is" doesn't combine directly with a past tense verb. The phrase requires a subject like "it" to form a proper clause, such as "that it was".
What are some alternatives to using "that is was"?
Instead of "that is was", you can use alternatives like "that it was", "that was", or "the fact that it was", depending on the intended meaning.
How can I avoid using "that is was" in my writing?
Pay attention to sentence structure when using "that", "is", and "was". Ensure there's a subject (usually "it") between "that" and "was" to maintain grammatical correctness. For example, "I thought that is was a good idea" should be "I thought that it was a good idea".
Is there any context where "that is was" might be acceptable?
The phrase "that is was" is generally considered incorrect in formal writing. While you might encounter it in informal speech or writing, it's best to avoid it in situations where grammatical accuracy is important. Prefer correct constructions like that it was or "what it was" instead.
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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
82%
Authority and reliability
1.8/5
Expert rating
Real-world application tested