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
must be interesting
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "must be interesting" is correct and can be used in written English.
It is used to express an assumption that something is likely to be interesting or intriguing. For example, "The new exhibit at the museum looks like it will be full of fascinating artwork; it must be interesting."
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(14)
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
38 human-written examples
That must be interesting to play?
News & Media
An idea counted as creative must be interesting.
Science
That must be interesting for your actors and singers.
News & Media
The danger here is that it must be interesting effluvia.
News & Media
Being little is not enough to qualify as good cocktail fare; the food must be interesting, too.
News & Media
Dr. Kaplan remarked that it must be interesting for the Prince to see so much of home in the gallery.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
22 human-written examples
It then shows the condition that an on-line policy must satisfy to be interesting and illustrate some formulations of the Design Problem that satisfies this condition.
"Oh, that must be so interesting.
News & Media
There must be an interesting history.
News & Media
pressions and experiences must be very interesting.
Academia
It must be an interesting thing to be inside Trump's brain.
News & Media
Expert writing Tips
Best practice
When using "must be interesting", ensure that the context provides a clear basis for the assumption. Avoid using it arbitrarily without any supporting evidence or reason.
Common error
Avoid using "must be interesting" as a generic filler phrase. Instead, provide specific details about why something is interesting. For example, instead of saying "The documentary must be interesting", say "The documentary must be interesting, given its focus on previously unseen footage."
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "must be interesting" functions as an epistemic modal. It expresses a degree of certainty or logical deduction about something being intriguing or engaging. Ludwig examples demonstrate this usage in various contexts, ranging from personal experiences to broader observations. Ludwig AI confirms its grammatical correctness.
Frequent in
News & Media
50%
Science
25%
Wiki
15%
Less common in
Formal & Business
5%
Encyclopedias
3%
Reference
2%
Ludwig's WRAP-UP
The phrase "must be interesting" is a versatile epistemic modal used to express a reasoned assumption that something is likely intriguing or engaging. As Ludwig examples show, this phrase frequently appears in News & Media, Science, and Wiki contexts, demonstrating its broad applicability. While grammatically correct and widely used, avoid overusing it as filler; instead, provide specific details to support the assumption. According to Ludwig AI, the phrase is correct and can be used in written English to express an assumption. Remember that ""must be interesting"" differs from "is interesting" in that it conveys an inference rather than a direct assertion.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
is bound to be interesting
Implies a higher degree of certainty or inevitability, intensifying the conviction about the subject.
has to be interesting
Emphasizes a requirement or condition for something to be considered worthwhile, instead of an assumption.
can't help but be interesting
Highlights the compelling or unavoidable nature of the subject's interest, adding a sense of intrigue.
should be interesting
Suggests a recommendation or expectation for something to be engaging, in contrast to a deduction.
is probably interesting
Indicates a possibility rather than a certainty, weakening the strength of the assertion.
would likely be interesting
Introduces a hypothetical or speculative element, making the assertion less direct and more tentative.
seems like it would be interesting
Expresses more uncertainty by adding a conditional aspect and softening the deduction.
sounds like it's interesting
Shifts the focus to auditory information as the basis for the assumption, narrowing the type of experience.
could potentially be interesting
Weakens the assertion by emphasizing the conditional or possible aspect of the subject's interest.
appears to be interesting
Focuses on visual perception as the basis for the assumption, thereby specifying a type of evidence.
FAQs
How can I use "must be interesting" in a sentence?
Use "must be interesting" to express a logical assumption that something is likely to be engaging or intriguing, based on available information. For example, "Seeing the Prince at the gallery /s/must+be+interesting for him, as it's so much like home".
What are some alternatives to saying "must be interesting"?
You can use alternatives like "has to be interesting", "should be interesting", or "is bound to be interesting" depending on the context.
Is it better to say "must be interesting" or "is interesting"?
"Must be interesting" implies an assumption based on available information, while "is interesting" is a direct statement of fact or opinion. The better choice depends on whether you are making a deduction or expressing a personal view.
What's the difference between "must be interesting" and "might be interesting"?
"Must be interesting" suggests a high probability or strong likelihood, while "might be interesting" indicates a possibility or lower level of certainty. "Might be interesting" implies that something could be interesting, but you're not sure, whereas ""must be interesting" implies a stronger belief based on reasoning.
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
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested