But one day vs Yet

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

But one day

Top 2,000 (common)

Yet

Top 1,000 (very common)A2adverb
Most common: Yet
 But one dayYet
Pronunciation🇬🇧 //bʌt wʌn deɪ//🇺🇸 //bʌt wʌn deɪ//🇬🇧 /["/jet/"]/🇺🇸 /["/jet/"]/
MeaningA phrase used to introduce a story or change in events.up to now; at this time
ExampleBut one day, everything changed when the storm hit the village.I haven't finished my homework yet.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR level-A2
Part of speechadverb
Collocationsbut one day my life changed, but one day everything went wrong, but one day she leftnot yet, yet to come, will you yet
Antonyms-already
Common mistakesUsing it in formal academic writing., Placing it in the middle of sentences instead of at the start., Confusing it with 'however' or other conjunctions.Confused with 'but' in meaning., Omitting 'not' in negative sentences., Using 'yet' in statements instead of questions or negatives.
Usage notesCommonly used in storytelling to indicate a turn or pivotal moment. It's suitable for informal and formal narratives but might feel out of place in direct, factual writing.Used to indicate that something has not happened up to the present moment. Common in negative sentences and questions. Avoid using in formal writing as it may sound too casual.

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But one day
Yet

Frequently asked questions: But one day vs Yet

What's the difference between But one day and Yet?

But one day: A phrase used to introduce a story or change in events. Yet: up to now; at this time

Which is more common: But one day and Yet?

Yet is the most common in everyday English.

Can you show an example of each?

But one day: But one day, everything changed when the storm hit the village. Yet: I haven't finished my homework yet.

Can I use But one day and Yet interchangeably?

Not always. But one day and Yet 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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