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
this must be understood
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "this must be understood" is correct and usable in written English. You can use it when emphasizing the importance of a particular point or concept that needs to be acknowledged. For example, "In order to move forward, this must be understood: collaboration is key." Alternative expressions include "this should be recognized" and "this needs to be acknowledged."
✓ Grammatically correct
Science
News & Media
Academia
Encyclopedias
Alternative expressions(20)
please keep in mind that
bear in mind that
remember that
don't forget that
it should be noted that
it's important to remember that
you should remember that
it's worth noting that
take note that
consider that
let's not forget that
please remember that
do not forget that
please bear in mind that
please be noted that
for your information
please kindly note that
note that
please also note that
it is important to note that
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
12 human-written examples
This must be understood by Yonkers residents themselves.
News & Media
With the support for both a fresh referendum and the left leadership so high, this must be understood as a battle within Corbynism's support base.
News & Media
There are very real risks for a woman coming forward to disclose this kind of abuse, and this must be understood by all agencies involved".
News & Media
The spherical particles of fly ash and the platy particles of metakaolin show opposite effects in each of these areas, and this must be understood and controlled if an effective geopolymer concrete is to be designed.
Science
All of this must be understood in the context of enormous international Internet bandwidth growth since 2002.
All of this must be understood in the context of enormous total international bandwidth growth between 2002 and 2011 at all levels of analysis.
Human-verified similar examples from authoritative sources
Similar Expressions
48 human-written examples
This quotation must be understood in context: in this passage, Brentano aims at providing one (of six) criteria to distinguish mental from physical phenomena with the aim to define the subjekt matter of scientific psychology – and not to develop a systematic account of intentionality.
Science
This tension must be understood, and trust must be fostered amongst stakeholders.
Mr. Fisher believes that this reaction must be understood in historical context.
News & Media
This competition must be understood to minimize the negative impact of heterotrophic bacteria on an aquaculture system.
Science
But this engagement must be understood as strictly transactional, and not as a means to pull Russia back into accepting international norms and values.
News & Media
Expert writing Tips
Best practice
Employ this phrase when transitioning from a general observation to a specific, critical nuance that dictates the validity of your thesis.
Common error
Avoid using the phrase as a generic transition. If the context makes the point obvious, using "this must be understood" can feel pedantic or redundant to the reader. Only use it when the interpretation you are about to provide is non-obvious or vital to the argument.
Source & Trust
89%
Authority and reliability
4.8/5
Expert rating
Real-world application tested
Linguistic Context
This phrase functions as a modal passive construction used to impart a sense of necessity and objective requirement. According to Ludwig AI, the phrase is grammatically correct and is frequently used to establish the interpretative framework for a following or preceding argument.
Frequent in
Science
45%
News & Media
35%
Academia
15%
Less common in
Encyclopedias
3%
Reference
1%
Social Media
1%
Ludwig's WRAP-UP
"this must be understood" is a robust and grammatically correct English phrase. Ludwig AI analysis confirms its widespread use across diverse high-authority sectors, from constitutional law to molecular biology. It serves as a powerful rhetorical tool for authors to mandate the interpretation of facts or definitions. Users should utilize it strategically to highlight fundamental premises without overloading the text with excessive directives. Its strong presence in sources like The New York Times and Cornell University highlights its utility in professional and scholarly writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
this should be recognized
Shifts from a mandatory 'must' to a slightly more recommendatory 'should'.
this needs to be acknowledged
Focuses on the admission or recognition of a specific fact.
it is essential to understand this
Reconstructs the phrase to emphasize the importance of the cognitive act.
this is to be understood
Uses a more prescriptive, almost legalistic tone often seen in definitions.
this should be kept in mind
Less forceful, suggesting the reader retain the information as they proceed.
this must be taken into account
Implies the information is a necessary variable in a broader analysis.
this must be grasped
Uses a more metaphorical verb for comprehension to suggest a deeper level of understanding.
this ought to be realized
Utilizes 'ought' to suggest a logical or ethical imperative.
one must realize that
Changes the passive voice to an active construction with a general subject.
this requires careful consideration
Focuses on the process of thinking rather than the final state of understanding.
FAQs
How do I use "this must be understood" in a sentence?
You can use it at the beginning of a clause to anchor a fact, such as: "In the context of the new law, "this must be understood" as a temporary measure."
What can I say instead of "this must be understood"?
Depending on the desired tone, you can use alternatives like "this should be recognized", "this needs to be acknowledged" or "this is to be understood".
Is "this must be understood" too formal for an email?
It is quite formal. For a standard business email, consider a softer version like "please keep in mind that" unless you are writing an official report or legal notice.
What is the difference between "this must be understood" and "this should be understood"?
The difference lies in the level of obligation. "this must be understood" expresses a mandatory requirement, whereas "this should be understood" suggests a strong recommendation or a logical expectation.
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
89%
Authority and reliability
4.8/5
Expert rating
Real-world application tested