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 checked
Grammar usage guide and real-world examplesUSAGE SUMMARY
The part of the sentence "must be checked" is correct and usable in written English.
You can use it when you want to emphasize the need for something to be reviewed or verified. For example: All accounts must be checked before closing the books for the month.
✓ Grammatically correct
News & Media
Science
Academia
Alternative expressions(20)
needs to be verified
should be verified
has to be verified
needs to be checked
should be checked
demands scrutiny
must be chosen
must be examined
must be monitored
must be scrutinised
must be inspected
must be investigated
must be characterised
must be verified
must be challenged
must be evaluated
must be characterized
must be ascertained
must be picked
must be selected
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
He must be checked.
News & Media
But every one must be checked out.
News & Media
All such devices must be checked.
News & Media
The proportions must be checked and sometimes modified during printing.
Encyclopedias
All firearms, firearm parts and ammunition must be checked.
News & Media
You must be checked off in lab today or tomorrow.
The 'sense' of any current transformers must be checked to ensure terminals are not reversed.
Lateral torsional buckling is the main limit state that must be checked for steel beams.
Before a tank is filled with sand, gravel or foam, it must be checked for leaks.
News & Media
Clearances must be checked; databases scoured, operations assessed, sources and methods protected.
News & Media
Cellphones must be checked at the door, where they'll "sleep" in miniature sleeping bags.
News & Media
Expert writing Tips
Best practice
When using "must be checked", ensure that the context clearly indicates who is responsible for performing the check and what criteria they should use. This adds clarity and prevents ambiguity.
Common error
Avoid using "must be checked" excessively in casual writing or conversations. While grammatically sound, it can sound overly formal or authoritarian. Opt for more natural alternatives like "should be checked" or "needs to be looked at" in such situations.
Source & Trust
86%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "must be checked" functions as a modal passive construction, indicating a necessity or obligation for something to undergo verification. Ludwig AI confirms its correctness and usability in English writing.
Frequent in
News & Media
36%
Science
32%
Academia
15%
Less common in
Formal & Business
8%
Wiki
5%
Encyclopedias
2%
Ludwig's WRAP-UP
In summary, the phrase "must be checked" is a grammatically sound and frequently used construction to convey the necessity of verification. As Ludwig AI explains, it emphasizes the need for something to be reviewed or validated. Its usage spans diverse contexts, from news and media to scientific and academic writing, though it leans towards a neutral to formal register. When using this phrase, ensure clarity regarding responsibility and criteria for the check. Consider alternatives like "needs to be verified" or "should be verified" in less formal settings. With a wealth of real-world examples, Ludwig confirms the phrase's versatility and correctness in written English.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
needs to be verified
Emphasizes verification as a need, slightly less forceful than "must".
has to be verified
Similar in strength to "must", but with a slightly more colloquial tone.
should be verified
Suggests a recommendation rather than a strict requirement.
is required to be verified
More formal and emphasizes the requirement explicitly.
needs verification
Focuses on the action of verification itself.
is essential to verify
Emphasizes the importance of the verification process.
requires inspection
Implies a more detailed and methodical examination.
demands scrutiny
Highlights the need for careful and critical observation.
is imperative to validate
Highlights the urgency and importance of validation.
warrants validation
Indicates that something deserves to be proven correct.
FAQs
How to use "must be checked" in a sentence?
Use "must be checked" when emphasizing the necessity of verifying something. For example, "All data entries "must be checked" for accuracy".
What can I say instead of "must be checked"?
You can use alternatives like "needs to be verified", "should be verified", or "has to be verified" depending on the context.
Which is correct, "must be checked" or "needs to be checked"?
Both are grammatically correct, but "must be checked" conveys a stronger sense of obligation than "needs to be checked". The choice depends on the intended level of emphasis.
What's the difference between "must be checked" and "should be checked"?
"Must be checked" implies a requirement, while "should be checked" suggests a recommendation. Use "must" when it's essential, and "should" when it's advisable.
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