Be quiet vs Shut your mouth

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

Be quiet

Top 2,000 (common)

Shut your mouth

InformalTop 2,000 (common)
Most formal: Be quiet
 Be quietShut your mouth
Pronunciation🇬🇧 //biː ˈkwaɪət//🇺🇸 //bi ˈkwaɪət//🇬🇧 //ʃʌt jɔː məʊθ//🇺🇸 //ʃʌt jʊr maʊθ//
MeaningStop making noise.Stop talking.
ExampleThe teacher told the students to **be quiet** during the test.He told her to shut your mouth during the argument.
RegisterNeutralInformal
How commonTop 2,000 (common)Top 2,000 (common)
Collocationsbe quiet in class, ask someone to be quiet, tell someone to be quietshut your mouth now, shut your mouth and listen, shut your mouth, please
Antonymsmake noise, speak loudlySpeak up, Open your mouth, Talk, Express yourself
Common mistakesUsing 'be quiet' in a friendly context without softening the request., Incorrectly saying 'be quieted'., Confusing with 'be silent', which feels more formal.Using 'shut your mouth' in a formal context., Confusing with 'close your mouth' (which is more physical)., Overusing it can sound rude.
Usage notesUse 'be quiet' when asking someone to lower their voice. It's appropriate in both formal and informal contexts but can sound rude if used abruptly.Use in casual situations to tell someone to stop speaking, often used in a playful or annoyed manner. Not appropriate in formal settings.

See it in real clips

Be quiet
Shut your mouth

Frequently asked questions: Be quiet vs Shut your mouth

What's the difference between Be quiet and Shut your mouth?

Be quiet: Stop making noise. Shut your mouth: Stop talking.

Which is more formal: Be quiet and Shut your mouth?

Be quiet is the most formal of these.

Can you show an example of each?

Be quiet: The teacher told the students to **be quiet** during the test. Shut your mouth: He told her to shut your mouth during the argument.

Can I use Be quiet and Shut your mouth interchangeably?

Not always. Be quiet and Shut your mouth 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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