The time it takes to say あっ is imagined as an instant; 間に places the event within that tiny span.
The time it takes to say あっ is imagined as an instant; 間に places the event within that tiny span.
What does あっという間に mean?
So quickly that the time seems to vanish.
How do you read あっという間に?
It is read あっというまに, written atto iu ma ni.
When would you use あっという間に?
Use it for changes or events that feel surprisingly fast, including time spent happily.
How is あっという間に different from すぐに?
すぐに simply says that something happens soon; this also conveys surprise at how little time seemed to pass.
How does あっという間に change in a sentence?
It is fixed as an adverbial expression with に and does not conjugate.