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 missing
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "must be missing" is correct and usable in written English.
It can be used to indicate that something is absent or not present when it is expected to be there. Example: "The report seems incomplete; some crucial data must be missing."
✓ Grammatically correct
News & Media
Science
Wiki
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
38 human-written examples
I must be missing something, right?
News & Media
I thought I must be missing something".
News & Media
I began to think that I must be missing something.
News & Media
But something must be missing from this explanation.
News & Media
He concludes that economists must be missing some important point.
News & Media
But this was no problem, according to his theory: the book must be missing pages.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
22 human-written examples
The Premier League has made itself unmissable, but then insisted there are times that it must be missed – by refusing to allow all matches to be televised to ensure that fans keep flocking to stadiums across the country.
News & Media
Moreover, the RNA-seq studies focused on RNA from only one tissue (flower buds) and any sex-linked genes not expressed in flower buds, or expressed at low levels, must be missed [ 6– 8].
Science
"America must not be missing in action at the World Conference come September," Mr. Price said.
News & Media
Which is why a piece of the DeSean Jackson saga must still be missing.
News & Media
"You must really be missing your country right now" laughs Andrew the lab technician as he sips tea from a disposable cup.
News & Media
Expert writing Tips
Best practice
When using "must be missing", ensure the context clearly indicates what is expected but absent. For instance, "If the document is incomplete, some pages "must be missing".
Common error
Avoid using "must be missing" when there's no clear expectation of what should be present. Instead of "The data must be missing", specify from where or what: "The data from last year "must be missing" from the database".
Source & Trust
86%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "must be missing" functions as a modal verb phrase to express a strong inference or deduction about the absence of something. As Ludwig AI confirms, the phrase is correct and usable in written English. Examples from Ludwig demonstrate its usage in various contexts, such as indicating missing data or components.
Frequent in
News & Media
55%
Science
25%
Wiki
10%
Less common in
Encyclopedias
5%
Formal & Business
3%
Reference
2%
Ludwig's WRAP-UP
In summary, "must be missing" is a commonly used and grammatically sound modal verb phrase that expresses a strong inference about something being absent. According to Ludwig, this phrase is correct and usable. While appropriate for general use, consider more formal alternatives like "is likely absent" for academic or professional contexts. Ensure clarity by specifying what is expected but absent. This analysis is supported by numerous examples from reputable sources, making it a versatile addition to your vocabulary.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
is likely absent
Emphasizes probability rather than certainty of absence.
is probably lacking
Highlights a deficiency or shortage.
is possibly omitted
Focuses on the act of leaving something out.
could be absent
Suggests a possibility of absence.
might be deficient
Implies a shortfall in quantity or quality.
may be unavailable
Indicates something is not accessible or present.
is conceivably gone
Highlights the potential disappearance of something.
must have been left out
Emphasizes unintentional omission.
it would seem to lack
Adds a level of uncertainty and subjectivity.
evidently, it is not there
States obvious absence.
FAQs
How can I rephrase "must be missing" to sound more formal?
To achieve a more formal tone, consider alternatives such as "is likely absent", "is probably lacking", or "it would seem to lack". These options provide a similar meaning while maintaining a higher level of formality.
Is "must be missing" appropriate for academic writing?
While "must be missing" is grammatically correct, it may sound less formal. In academic writing, more precise alternatives like "is likely absent" or "is conceivably gone" may be preferable to convey a higher level of certainty or scholarly tone.
What does it mean when something "must be missing"?
When something "must be missing", it implies that something expected or required is not present. For example, "If the recipe isn't working, an ingredient "must be missing"" suggests a necessary component is absent.
How to use "must be missing" in a sentence?
You can use it to express that something is absent and expected to be there, like: "If the calculations are incorrect, a step "must be missing"". Alternatively, to suggest a possibility, try: "Some context "must be missing" to fully understand the situation".
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
86%
Authority and reliability
4.6/5
Expert rating
Real-world application tested