No I'm not vs Not at all

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

No I'm not

InformalTop 2,000 (common)

Not at all

Top 2,000 (common)
Most formal: Not at all
 No I'm notNot at all
Pronunciation🇬🇧 //nəʊ aɪm nɒt//🇺🇸 //noʊ aɪm nɑt//🇬🇧 //nɒt æt ɔːl//🇺🇸 //nɑt æt ɔl//
MeaningNo, I don't agree or I don't want to.not even a little bit
ExampleDo you want to go out tonight? No, I'm not.I didn't like the movie, not at all.
RegisterInformalNeutral
How commonTop 2,000 (common)Top 2,000 (common)
Collocationssay no, make a negative statement, express disagreementnot at all worried, not at all surprising, not at all offended
Antonyms-at all, somewhat, partially
Common mistakesUsing it in a formal setting where a more polite refusal is needed., Adding unnecessary words that make it unclear., Mispronouncing 'no' or 'not'.Confusing with 'not really' which is less absolute., Using it in formal contexts where a less emphatic phrase is better., Omitting it when it's necessary for clarity.
Usage notesUsed to refuse or disagree informally. Common in spoken conversation, but may be considered impolite in formal contexts.Use 'not at all' to emphasize complete disagreement or absence. It's appropriate in both spoken and written contexts but less common in formal writing.

See it in real clips

No I'm not
Not at all

Frequently asked questions: No I'm not vs Not at all

What's the difference between No I'm not and Not at all?

No I'm not: No, I don't agree or I don't want to. Not at all: not even a little bit

Which is more formal: No I'm not and Not at all?

Not at all is the most formal of these.

Can you show an example of each?

No I'm not: Do you want to go out tonight? No, I'm not. Not at all: I didn't like the movie, not at all.

Can I use No I'm not and Not at all interchangeably?

Not always. No I'm not and Not at all 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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