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 surely be
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "must surely be" is a correct and usable part of a sentence in written English.
It is typically used to express a strong belief or assumption about something being true or happening. Example: "After working hard for so many years, he must surely be feeling proud of his accomplishments."
✓ Grammatically correct
News & Media
Academia
Alternative expressions(20)
should be
must certainly be
has to be
is undoubtedly
is very likely to be
is bound to be
will definitely be
cannot be ruled out
must arguably be
must probably be
must evidently be
must assuredly be
must definitely be
must necessarily be
must unquestionably be
must really be
must inevitably be
must undoubtedly be
must absolutely be
must clearly be
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
Mr Erdogan must surely be wondering.
News & Media
The first view must surely be correct.
News & Media
This must surely be a first.
News & Media
He must surely be an admirable man.
News & Media
But these must surely be far-fetched.
News & Media
United's players must surely be confused.
News & Media
Must surely be doing something wrong.
News & Media
New York City must surely be St.
News & Media
Something else must surely be going on.
News & Media
That must surely be the vision for 2020.
News & Media
That must surely be true for most Afghans.
News & Media
Expert writing Tips
Best practice
Use "must surely be" when you want to express a strong belief or logical conclusion based on available evidence, but acknowledge a slight possibility of error.
Common error
Avoid using "must surely be" when the situation requires absolute certainty or verifiable fact. Choose phrases that reflect the actual level of evidence you possess.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "must surely be" functions as a modal expression used to convey a strong degree of certainty or logical inference. As shown by Ludwig, this phrase implies a high probability while acknowledging a slight possibility of error.
Frequent in
News & Media
69%
Academia
17%
Science
14%
Less common in
Ludwig's WRAP-UP
In summary, "must surely be" is a versatile phrase used to express a strong belief or deduction, as confirmed by Ludwig. It's grammatically correct and commonly found in various sources, including news, academic texts, and general writing. While indicating confidence, it also implies a degree of uncertainty, making it suitable for situations where absolute certainty isn't guaranteed. When writing, it's crucial to avoid overstating facts and consider alternative expressions like "certainly is" or "very likely is" when a less assertive tone is needed.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
must certainly be
Emphasizes certainty more directly, reducing the element of assumption.
has to be
Indicates necessity or strong likelihood, often in a more informal context.
is undoubtedly
Expresses a lack of doubt, focusing on the proven nature of something.
is very likely to be
Uses explicit probability, making the expectation less assertive.
is bound to be
Implies inevitability, often based on a set of circumstances.
will definitely be
Stresses the sureness of a future event or state.
is assuredly
Conveys confidence and certainty, but can sound more formal.
should definitely be
Adds a layer of recommendation or expectation to the certainty.
is probably
Uses probability, making the expectation less assertive and more commonplace.
cannot be ruled out
Focuses on the possibility rather than the certainty, indicating an open consideration.
FAQs
How can I use "must surely be" in a sentence?
The phrase "must surely be" expresses a strong belief or assumption. For example, "Given his expertise, he "must surely be" the best candidate for the job."
What are some alternatives to "must surely be"?
Alternatives include "certainly is", "undoubtedly is", or "very likely is", depending on the context and the degree of certainty you want to convey.
Is it more appropriate to use "must be" or "must surely be"?
"Must be" indicates a deduction or strong probability. "Must surely be" adds emphasis, conveying a heightened sense of confidence in the deduction. The choice depends on how strongly you want to express your belief.
What's the difference between "must surely be" and "should be"?
"Must surely be" expresses a strong belief that something is true, based on evidence. "Should be" indicates an expectation or recommendation. For example, "He "must surely be" tired after such a long journey" suggests you strongly believe he's tired. "He "should be" more careful" recommends a behavior change.
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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
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested