Which is correct:
"for all of a sudden" or "on all of a sudden"?

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for all of a sudden

'For all of a sudden' is not a standard English expression.

This phrase is not used in English. The correct phrase is 'all of a sudden.'

on all of a sudden

'On all of a sudden' is not a standard English expression.

This phrase is not used in English. The correct phrase is 'all of a sudden.'
The correct phrase is 'all of a sudden.' 'For all of a sudden' is not a standard English expression. 'All of a sudden' is a common phrase used to describe something happening quickly and unexpectedly.

Last updated: March 27, 2024

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