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 was the problem
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that was the problem" is correct and usable in written English.
You can use it when you are discussing a solution to a problem. For example: "We tried many solutions, but none of them worked. Then we realized that was the problem - we needed to approach it from a different perspective."
✓ Grammatically correct
News & Media
Alternative expressions(16)
the issue was
the difficulty was
the root of the matter was
the crux of the matter was
that was the issue
that was the model
that was the consensus
that was the goal
that was the spark
that was the game
that settled it
that was the turning point
that was the point
that was the blueprint
that was the icebreaker
that gave rise to
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
50 human-written examples
To Johansson, that was the problem.
News & Media
It was autumn that was the problem.
News & Media
But we opened up too much – that was the problem".
News & Media
It wasn't the land that was the problem.
News & Media
It wasn't evolving English that was the problem.
News & Media
It was the money that was the problem.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
10 human-written examples
It's women that are the problem.
News & Media
Um, well, yes, that is the problem.
News & Media
To me, that's the problem.
News & Media
No-one - that is the problem.
News & Media
That is the problem".
News & Media
Expert writing Tips
Best practice
Use "that was the problem" to succinctly identify the central issue in a discussion or analysis. It is especially effective after reviewing unsuccessful attempts to resolve a situation.
Common error
Avoid using "that was the problem" repeatedly in close proximity, as it can make your writing sound monotonous. Vary your language by using synonyms or more descriptive explanations of the issue.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that was the problem" functions as a concise way to identify the central issue or obstacle in a given situation. It usually appears after an analysis or explanation of events, as confirmed by Ludwig's examples.
Frequent in
News & Media
80%
Formal & Business
10%
Wiki
5%
Less common in
Science
2%
Encyclopedias
1%
Reference
2%
Ludwig's WRAP-UP
In summary, "that was the problem" is a versatile phrase used to pinpoint the central issue after analyzing a situation. It's deemed grammatically correct and very common, according to Ludwig, appearing frequently in news and media. While effective, it's important to avoid overuse and consider alternative expressions to maintain writing quality. It serves as a tool for clarity and insight in various contexts.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that's where the issue lay
Replaces "problem" with "issue" and uses a more descriptive verb phrase "where the issue lay".
that's what caused the difficulty
Substitutes "problem" with "difficulty" and uses a causal structure.
that explains the trouble
Replaces "that was" with "that explains" to provide an explanation.
the core issue was that
Highlights the "core issue" for emphasis.
the fundamental flaw was
Emphasizes a "fundamental flaw" as the cause.
the root of the matter was
Uses a more descriptive and emphatic phrase.
the underlying cause was
Focuses on the "underlying cause" as the main issue.
this is where it all went wrong
Expresses the idea of something going wrong.
the deficiency resided in
Identifies a "deficiency" as the central issue.
the crux of the matter was
Emphasizes the "crux of the matter" for clarification.
FAQs
How can I use "that was the problem" in a sentence?
You can use "that was the problem" to point out the central issue after analyzing a situation. For example, "We tried several solutions, but "that was the problem": we didn't understand the core issue."
What are some alternatives to "that was the problem"?
Alternatives include phrases like "the issue was", "the difficulty was", or "the root cause was", depending on the context.
Is it okay to start a sentence with "that was the problem"?
Yes, starting a sentence with "that was the problem" is acceptable and can be effective for emphasis. However, ensure it flows logically from the preceding context.
What's the difference between "that was the problem" and "that is the problem"?
"That was the problem" refers to a past issue that has been identified, while "that is the problem" refers to a current or ongoing issue.
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
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested