Must vs You should definitely stay here

When to use each in English, with meaning, register, and examples.

Must

High-frequency chunkA1

You should definitely stay here

Top 2,000 (common)
Most common: Must
 MustYou should definitely stay here
Pronunciation🇬🇧 /["/məst//mʌst/","/ˈmʌsnt/"]/🇺🇸 /["/məst//mʌst/","/ˈmʌsnt/"]/🇬🇧 //juː ʃəd ˈdɛfənɪtli steɪ hɪə//🇺🇸 //ju ʃəd ˈdɛfənətli steɪ hɪr//
MeaningSomething that is necessary or very important.It's strongly suggested that you remain in this place.
ExampleYou must finish your homework before playing outside.You should definitely stay here if you want to see the sunset.
RegisterNeutralNeutral
How commonHigh-frequency chunkTop 2,000 (common)
CEFR levelA1-
Collocationsmust see, must do, must have, must rememberdefinitely recommend, definitely agree, should stay
Antonymscan, may, might-
Common mistakesUsing 'must' in situations where 'have to' is more suitable., Confusing 'must' with 'might' or 'may', which imply possibility instead of necessity., Using 'must' with the gerund form instead of the base form of the verb.Confusing 'definitely' with 'definately' (spelling error)., 'Should' can be misunderstood as a suggestion rather than advice., Using 'stay' in contexts where 'go' would be more appropriate.
Usage notesUse 'must' when giving strong advice or making strong recommendations. Avoid using it in casual conversations where 'should' might be more appropriate.Use this phrase when encouraging someone to remain. It's suitable for friendly or persuasive contexts, but may not fit formal situations.

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Must
You should definitely stay here

Frequently asked questions: Must vs You should definitely stay here

What's the difference between Must and You should definitely stay here?

Must: Something that is necessary or very important. You should definitely stay here: It's strongly suggested that you remain in this place.

Which is more common: Must and You should definitely stay here?

Must is the most common in everyday English.

Can you show an example of each?

Must: You must finish your homework before playing outside. You should definitely stay here: You should definitely stay here if you want to see the sunset.

Can I use Must and You should definitely stay here interchangeably?

Not always. Must and You should definitely stay here are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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