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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
probably must
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "probably must" is not standard in written English and may sound awkward or contradictory.
It can be used when expressing a strong suggestion or necessity that is uncertain, but it is better to choose clearer alternatives. Example: "You probably must finish the report by tomorrow if you want to meet the deadline."
News & Media
Science
Encyclopedias
Alternative expressions(3)
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
21 human-written examples
It takes balls to backtrack this blatantly – but then, needs probably must.
News & Media
Words and phrases like "probably," "must have been" and "it would seem that" pop up often.
News & Media
"We probably must create a deeper experience of events that have so negatively marked the lives of people," he said.
News & Media
Although repeatedly contested, it probably must be accepted that the engravings were intended to be interpreted together.
Encyclopedias
He probably must finish first or second to earn enough points to qualify for the 20-horse field expected for the Kentucky Derby on May 4.
News & Media
An extension probably must be reached before any team will trade for the five-time N.H.L. scoring champion, who is owed $20.7 million over the next two seasons.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
35 human-written examples
In practice, this means that even defendants who are probably innocent must endure the anguish of trial.
News & Media
Most probably it must be appreciated also as a most original, fiercely individualistic, antisocial piece of work, containing in its pages many of the philosophical themes that Sartre later developed.
Encyclopedias
But she made a convincing case for Anne as a strong and capable woman (anyone in the 16th century who bore and brought up twins, one probably disabled, must have been pretty capable) who was more important to Shakespeare, despite his long absences from Stratford, than is usually thought.
News & Media
"If they think about us at all, it's probably, 'They must be all better, so why aren't they back to work?' " Many believe the circumstances of their misfortune — that they were blue-collar folks gathered in a scruffy club to hear Great White, a has-been "hair metal" band from the '80s — also help explain the lack of interest.
News & Media
"It was probably a must win match for me as we're both British guys going for an Olympic place," Cook told BBC Sport.
News & Media
Expert writing Tips
Best practice
Consider using more direct and concise alternatives like "likely need to" or "probably have to" to enhance clarity and impact in your writing. While "probably must" is grammatically acceptable, these alternatives often provide a smoother reading experience.
Common error
Avoid relying too heavily on "probably must" in your writing. Overuse can make your prose sound hesitant and less confident. Vary your language by incorporating stronger or more precise modal verbs and adverbs to convey the intended degree of certainty and obligation.
Source & Trust
84%
Authority and reliability
3.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "probably must" functions as a modal expression, indicating a degree of uncertainty combined with obligation. It suggests that something is likely necessary. As noted by Ludwig AI, clearer alternatives may exist, but the phrase does appear in diverse contexts.
Frequent in
News & Media
42%
Science
33%
Encyclopedias
14%
Less common in
Wiki
5%
Formal & Business
0%
Academia
0%
Ludwig's WRAP-UP
In summary, the phrase "probably must" expresses a combination of likelihood and obligation, suggesting that something is both probable and necessary. Ludwig AI indicates that while grammatically correct, it can often be improved upon by using more direct alternatives. The phrase is commonly found in news, scientific, and encyclopedic sources, indicating a neutral level of formality. Consider using alternatives such as "likely need to" or "probably have to" for clearer and more impactful writing. The expert rating reflects that while the phrase is acceptable, it is not always the most refined choice.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
probably need to
Substitutes "must" with "need to", resulting in a slightly weaker expression of necessity.
likely need to
Replaces "probably" with "likely" and "must" with "need to", softening the obligation slightly.
it's probably necessary to
Replaces "must" with "necessary to", making the statement more formal.
most likely has to
Emphasizes likelihood while using "has to" to indicate obligation.
almost certainly has to
Strengthens the probability aspect while retaining the obligation.
it's likely essential to
Indicates that something is likely and essential, highlighting its importance.
more than likely has to
Replaces "probably" with the stronger "more than likely" to emphasize the chance of needing to do something.
should likely
Uses "should" to express a recommendation combined with "likely" to indicate probability.
it is advisable to
Suggests a course of action that is recommended but not strictly required.
it would be wise to
Highlights the prudence of a particular action.
FAQs
What are some alternatives to "probably must"?
You can use alternatives like "likely need to", "probably need to", or "most likely has to" depending on the context.
Is "probably must" grammatically correct?
Yes, "probably must" is grammatically acceptable, but it can sometimes sound awkward. Consider whether a stronger or more direct phrasing would be more effective.
When is it appropriate to use "probably must"?
It's appropriate when you want to express a suggestion or necessity that isn't certain. However, consider alternatives that might convey the same meaning more concisely.
How can I make my writing sound more confident than using "probably must"?
Try using stronger modal verbs like "should" or "need to" without the "probably", or rephrase the sentence to emphasize the necessity without hedging. For example, instead of "You probably must finish the report", try "You should finish the report" or "Finishing the report is essential".
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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
84%
Authority and reliability
3.8/5
Expert rating
Real-world application tested