Definition
- C1
Very quickly or sooner than expected; before one is fully aware of it.
很快
You'll get used to the new job before you know it, so don't worry.
你會不知不覺就習慣新工作，所以不用擔心。
The children grow up so fast; they'll be all grown up before you know it.
孩子們長得真快；他們很快就會長大了。
This weekend will be over before you know it, so we should enjoy it.
這個週末很快就會結束，所以我們應該好好享受。