Be quiet vs Shut up now

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

Be quiet

Top 2,000 (common)

Shut up now

InformalTop 5,000 (fairly common)
Most formal: Be quietMost common: Be quiet
 Be quietShut up now
Pronunciation🇬🇧 //biː ˈkwaɪət//🇺🇸 //bi ˈkwaɪət//🇬🇧 //ʃʌt ʌp naʊ//🇺🇸 //ʃʌt ʌp naʊ//
MeaningStop making noise.Stop talking
ExampleThe teacher told the students to **be quiet** during the test.During the argument, she suddenly yelled, 'Shut up now!' to make her point clear.
RegisterNeutralInformal
How commonTop 2,000 (common)Top 5,000 (fairly common)
Collocationsbe quiet in class, ask someone to be quiet, tell someone to be quietjust shut up now, please shut up now, shut up now and listen, always shut up now, shut up now, please
Antonymsmake noise, speak loudly-
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 it in formal situations, where it's inappropriate, Thinking it’s a polite way to ask someone to be quiet, Confusing with 'be quiet' which is softer
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 'shut up now' to tell someone to be quiet immediately. It's very direct and can be rude, so use in casual settings only.

See it in real clips

Be quiet
Shut up now

Frequently asked questions: Be quiet vs Shut up now

What's the difference between Be quiet and Shut up now?

Be quiet: Stop making noise. Shut up now: Stop talking

Which is more formal: Be quiet and Shut up now?

Be quiet is the most formal of these.

Which is more common: Be quiet and Shut up now?

Be quiet is the most common in everyday English.

Can you show an example of each?

Be quiet: The teacher told the students to **be quiet** during the test. Shut up now: During the argument, she suddenly yelled, 'Shut up now!' to make her point clear.

Can I use Be quiet and Shut up now interchangeably?

Not always. Be quiet and Shut up now 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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