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 be early
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "must be early" is correct and usable in written English.
It can be used when making an assumption or inference about the time, suggesting that something is likely happening or should happen soon. Example: "Since the streets are quiet and the sun is just rising, it must be early."
✓ Grammatically correct
News & Media
Science
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
11 human-written examples
But it must be early; there's no traffic around the Stadium.
News & Media
We muddled our priorities with the tuition fees cut … our priority must be early years And it is my kids, and your kids, who will suffer from this tedious, myopic and transactional schools policy.
News & Media
The Democrats went out of their way to note that the Republicans, when arguing in the State Supreme Court this week against extending the deadline for certifying the election results in Florida, had made it clear that any deadline must be early enough to allow time for the parties to contest the election if they choose to.
News & Media
Its management is primarily symptomatic and must be early.
Science
Consequently, defects must be early identified and corrected.
Sepsis is a time-dependent process that must be early detected and treated.
Human-verified similar examples from authoritative sources
Similar Expressions
48 human-written examples
"Neymar, Messi and 21 others?? Must be earlier there than here?
News & Media
The applicants must be early-career scientists, meaning they cannot yet have achieved tenure.
Science & Research
"The timing of mutations must be earlier than the separation of populations," says Stanford geneticist Luca CavaLucaSforza.
Science & Research
In both instances, we know that the actual date of dispersal must be earlier, but we do not know how much.
Science
Leeks are plodders, and must be sown early if they are to reach a reasonable size.
News & Media
Expert writing Tips
Best practice
When using "must be early" to describe a necessary action, ensure the context clearly indicates why early action is important for the desired outcome.
Common error
Avoid using "must be early" when a weaker suggestion is more appropriate. "Should be early" or "could be early" might be better if the situation doesn't demand strict adherence to an early timeframe.
Source & Trust
86%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "must be early" functions primarily as a modal construction expressing necessity or strong inference related to timing. The modal verb 'must' indicates a high degree of certainty or obligation, as supported by Ludwig AI.
Frequent in
Science
70%
News & Media
20%
Formal & Business
10%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "must be early" is a grammatically sound phrase used to express a strong need for timeliness or to infer that something is likely happening soon. Ludwig AI confirms its correctness and usability. While relatively uncommon, it finds use across scientific and news contexts, making it suitable for both professional and neutral communication. Remember to use it when emphasizing the importance of early action and avoid overuse in situations calling for a weaker suggestion. Alternatives such as "should be early" or "has to be early" can provide nuanced variations in meaning.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
should be early
Suggests a recommendation or expectation, rather than a strong necessity.
has to be early
Emphasizes obligation or requirement for something to occur early.
needs to be early
Highlights a need or requirement for early action.
ought to be early
Expresses a weaker sense of obligation or advisability.
must be sooner
Focuses on achieving something before a certain time.
should be sooner
Expresses a preference for an earlier timeframe.
needs to be sooner
Highlights a necessity for an earlier action.
required to be early
Emphasizes the mandatory aspect of early occurrence.
imperative to be early
Stresses the critical importance of being early.
critical to be early
Highlights the essential nature of being early for success.
FAQs
How to use "must be early" in a sentence?
The phrase "must be early" is used to indicate that something needs to happen soon or sooner than anticipated. For example: "Treatment must be early to avoid complications."
What can I say instead of "must be early"?
You can use alternatives like "should be early", "has to be early", or "needs to be early" depending on the context.
When is it appropriate to use "must be early" over "should be early"?
"Must be early" implies a necessity or strong obligation, while "should be early" suggests a recommendation or advisability. Use "must" when early action is critical.
Is "must be early" more formal than other similar phrases?
The formality depends on the overall context, but "must be early" is generally neutral. Phrases like "imperative to be early" may be more formal, while "has to be early" is less formal.
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
86%
Authority and reliability
4.1/5
Expert rating
Real-world application tested