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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 filed
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "must be filed" is correct and usable in written English.
It is typically used to indicate that something is required to be submitted or organized in a specific manner, often in a formal or legal context. Example: "All tax returns must be filed by April 15th to avoid penalties."
✓ Grammatically correct
News & Media
Wiki
Alternative expressions(18)
needs to be submitted
is required to be submitted
has to be lodged
is compulsory to send
should be submitted
must be registered
must be implemented
must be compiled
must be rescheduled
must be institutionalized
must be filled
must be finalized
must be issued
must be preferred
must be retrieved
must be finished
must be presentation
must be attributed
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
56 human-written examples
Complaints must be filed by April 1st.
News & Media
Claims must be filed within three years.
News & Media
These forms must be filed according to the college's deadlines.
News & Media
"Appeals must be filed by March 3," Ms. Stark said.
News & Media
It is not clear when a challenge must be filed.
News & Media
Claims must be filed with the court by Nov. 5.
News & Media
The applications must be filed by mid-February.
News & Media
The law says claims must be filed within two years of when they arise.
News & Media
Under federal law, most charges must be filed within five years of the conduct.
News & Media
Nomination papers must be filed by Nov. 22 for the Feb. 22 election.
News & Media
They must be filed promptly, and chief executives and financial officers must vouch for their accuracy.
News & Media
Expert writing Tips
Best practice
When using "must be filed", ensure that the context clearly indicates who is responsible for filing and by what deadline. Providing specific dates or timeframes will enhance clarity.
Common error
A frequent mistake is not clarifying the exact deadline for when something "must be filed". Always specify the date and time, and mention the consequences of missing the deadline to avoid confusion and potential issues.
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "must be filed" functions as a passive construction indicating obligation or necessity. Ludwig AI confirms its common usage across various contexts, showing that actions or documents need to be officially submitted.
Frequent in
News & Media
68%
Wiki
25%
Formal & Business
7%
Less common in
Academia
0%
Science
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, the phrase "must be filed" serves as a clear indicator of a required action, typically within formal or legal contexts. As Ludwig AI highlights, it is grammatically sound and frequently used across diverse sources, particularly in news and media. When using this phrase, remember to specify deadlines and responsible parties for clarity. Alternatives include "is required to be submitted" or "needs to be submitted", depending on the desired level of formality. Understanding these nuances ensures precise and effective communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
needs to be submitted
A more straightforward and less formal way of saying "must be filed".
is required to be submitted
Replaces "must be filed" with a more formal tone, emphasizing the mandatory nature of submission.
is required to be registered
Similar meaning, focuses on the registration aspect, often within legal or official contexts.
has to be lodged
Uses "lodged" as a synonym for filed, slightly less common but conveys the same meaning.
is obligatory to submit
Emphasizes the obligatory nature, suitable for formal or legal contexts.
is mandatory to register
Similar to "is required to be registered" but with a slightly stronger emphasis on the mandatory aspect.
is compulsory to send
Highlights that sending something is compulsory.
is imperative to present
Emphasizes the urgency and importance of presenting something.
should be submitted
Conveys a recommendation that is close to a requirement.
ought to be lodged
Similar to "should be submitted", indicating a strong suggestion or expectation.
FAQs
What does "must be filed" mean?
The phrase "must be filed" indicates a requirement or obligation to submit a document, application, or claim by a specific date or according to certain regulations. It emphasizes the mandatory nature of the action.
What can I say instead of "must be filed"?
You can use alternatives like "is required to be submitted", "needs to be submitted", or "has to be lodged" depending on the context.
Is "must be filed" formal or informal?
The phrase "must be filed" is generally considered neutral to formal. It's commonly used in legal, official, and professional contexts to indicate a mandatory requirement.
When should I use "must be filed" over other similar phrases?
Use "must be filed" when you want to clearly and firmly state a requirement for submission. If the context is more casual or less formal, phrases like "needs to be submitted" may be more appropriate. However, in legal or official contexts, "must be filed" provides the necessary emphasis.
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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
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested