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 could be
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that could be" is correct and usable in written English.
It can be used to express a possibility or potentiality regarding a situation or idea. Example: "There are many solutions to this problem, and that could be one of the most effective."
✓ Grammatically correct
News & Media
Wiki
Alternative expressions(20)
that can be
that might be
it's conceivable that
that might follow
that might ruin
that would be
that might correspond
that is possibly
it's plausible that
that could work
that might become
it is conceivable that
it is plausible that
it's likely that
that could result
that might foster
that might compromise
that seems to be
that could occur
that might rise
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
Unfortunately, that could be true.
News & Media
that could be costly forbs.
News & Media
that could be good.
News & Media
Anything that could be helpful.
Wiki
That could be awkward".
News & Media
That could be fascinating.
News & Media
That could be true.
News & Media
That could be ticklish.
News & Media
That could be next.
News & Media
That could be key.
News & Media
"That could be justified.
News & Media
Expert writing Tips
Best practice
Use "that could be" when expressing a potential outcome or possibility, especially when assessing different scenarios or options. It's appropriate for both formal and informal contexts.
Common error
Avoid relying too heavily on passive constructions with "that could be". Opt for more direct and active phrasing to enhance clarity and conciseness in your writing.
Source & Trust
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that could be" functions as a modal phrase used to express possibility, potential, or speculation. It indicates that something is not certain but is within the realm of what is achievable or true. Ludwig AI confirms the grammatical correctness of this phrase.
Frequent in
News & Media
75%
Wiki
10%
Formal & Business
5%
Less common in
Science
3%
Reference
2%
Encyclopedias
1%
Ludwig's WRAP-UP
In summary, the phrase "that could be" is a versatile and grammatically sound expression used to introduce possibilities or potential explanations. As noted by Ludwig AI, it is correct and widely applicable in both formal and informal contexts. Its prevalence in reputable news sources like The New York Times and The Economist underscores its appropriateness for professional communication. When using this phrase, consider alternatives such as "that may be" or "that might be" to fine-tune the degree of certainty you wish to convey.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
that may be
Replaces "could" with "may", indicating a slightly different degree of possibility.
that might be
Substitutes "could" with "might", suggesting a similar level of uncertainty.
that is potentially
Emphasizes the potential aspect of the situation.
that is possibly
Highlights the possibility, making it more explicit.
that can be
Uses "can" to express a general possibility or capability.
that would be
Shifts to a hypothetical scenario, suggesting a conditional possibility.
it's conceivable that
Introduces a more formal tone, emphasizing the conceivability of the situation.
it's plausible that
Suggests that something is believable or likely based on the available information.
that seems to be
Conveys an assessment based on observation or inference.
it's likely that
Expresses a higher degree of probability.
FAQs
How can I use "that could be" in a sentence?
The phrase "that could be" introduces a possibility or potential explanation. For example: "The delay might cause further complications, and "that could be" a problem".
What are some alternatives to "that could be"?
Alternatives include "that may be", "that might be", or "that is potentially" depending on the context and the degree of certainty you wish to convey.
Is there a difference between "that could be" and "that would be"?
"That could be" suggests a possibility in the present or future, while "that would be" implies a hypothetical situation or a conditional outcome. The choice depends on whether you're discussing a real possibility or a hypothetical scenario.
When is it appropriate to use "that could be" in formal writing?
The phrase "that could be" is suitable for formal writing when presenting potential scenarios or acknowledging uncertainties. It's often used in analytical or argumentative contexts to introduce possibilities, provided the overall tone remains professional.
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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
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested