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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 observed
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'must be observed' is correct and usable in written English.
It can be used to indicate a requirement that something must be taken into account, such as a rule, contractual obligation, or law. For example: "The safety protocols laid out in the company's manual must be observed at all times."
✓ Grammatically correct
Science
News & Media
Academia
Alternative expressions(20)
should be considered
needs to be taken into account
must be complied with
should be observed
must be taken into consideration
has to be complied with
it is important to note
must be heeded
it is necessary to consider
should be borne in mind
must be removed
must be monitored
must be served
must be adhered
must be upheld
must be respected
must be followed
ought to be observed
shall be complied with
must be considered
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
What requirements must be observed?
News & Media
Deadlines dates must be observed.
Academia
Still, certain standards must be observed.
News & Media
Certain standards must be observed in restaurants and theaters.
News & Media
Each room capacity must be observed when planning events.
Academia
In order to declare jihad, Fadl writes, certain requirements must be observed.
News & Media
The former must be observed for 10 years and the latter for 15.
News & Media
First, it must be observed that sanctity and canonization are not synonymous terms.
Encyclopedias
Therefore, their spirit must be observed as well as their letter.
Academia
This view would convert standing into a requirement that must be observed only when satisfied.
Academia
In other words, neither "community leaders" nor multicultural bureaucrats could talk of "the Muslim community" whose taboos must be observed.
News & Media
Expert writing Tips
Best practice
When using "must be observed", ensure the context clearly indicates what is being observed and why it is important. Clarity prevents ambiguity.
Common error
Avoid overuse of the passive voice with "must be observed". Active voice often makes writing more direct and engaging. For instance, instead of "The regulations must be observed by all employees", try "All employees must observe the regulations".
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "must be observed" functions as a modal verb phrase indicating obligation or necessity. Ludwig AI confirms its correct usage in expressing that something is required or essential to consider, note, or comply with. It is frequently used to express the importance of adhering to rules, regulations, or specific standards.
Frequent in
Science
33%
News & Media
30%
Academia
21%
Less common in
Formal & Business
10%
Encyclopedias
3%
Wiki
0%
Ludwig's WRAP-UP
In summary, the phrase "must be observed" is a grammatically sound and frequently used expression that signifies a requirement or obligation. As Ludwig AI confirms, it's widely employed across various contexts, including science, news, and academia, to emphasize the importance of adhering to specific rules, protocols, or considerations. While the phrase is generally neutral to formal, writers should be mindful of overusing the passive voice. Alternatives like "should be considered" or "needs to be taken into account" can offer more direct or nuanced ways of expressing similar meanings. The consistent and authoritative usage of "must be observed" underscores its importance in ensuring clarity and compliance in various forms of communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
must be taken into consideration
Similar to the original phrase but emphasizes consideration as a whole.
it is essential to observe
Adds emphasis by explicitly stating the importance of observing.
has to be complied with
Focuses on compliance with rules or regulations.
has to be noted
Replaces "observed" with "noted", emphasizing acknowledgement rather than adherence.
it is important to note
Focuses on highlighting something important for acknowledgment.
should be considered
Softens the obligation, suggesting a recommendation rather than a strict requirement.
must be heeded
Focuses on paying attention to warnings or advice.
it is necessary to consider
Highlights the necessity of giving something thought.
needs to be taken into account
Highlights the importance of considering something when making a decision.
should be borne in mind
Emphasizes remembering or keeping something in mind.
FAQs
How can I use "must be observed" in a sentence?
Use "must be observed" to indicate a necessary action or requirement. For example, "Safety protocols "must be observed" at all times."
What are some alternatives to "must be observed"?
Alternatives include "should be considered", "needs to be taken into account", or "must be complied with", depending on the context.
Is it better to use active or passive voice with "must be observed"?
While "must be observed" is grammatically correct, using the active voice can often create a stronger and more direct statement. For example, instead of "The rules must be observed by all", consider "All must observe the rules".
What's the difference between "must be observed" and "should be observed"?
"Must be observed" indicates a strict requirement, while "should be observed" suggests a recommendation or guideline. The choice depends on the level of obligation you want to convey.
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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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested