Come here quickly.
I quickly ate lunch.
Fashions change quickly.
The news quickly spread.
Bad news travels quickly.
He made up his mind quickly.
We walked more quickly than usual.
My father quickly scanned the newspaper.
My children wear out their shoes quickly.
I've never heard English spoken so quickly.
My older brother finished his homework very quickly.
Let's quickly finish the remaining work and go out for some drinks.
Make your airplane reservations early since flights fill up quickly around Christmas.
I think if I talked more often with a native speaker, my English skills would improve quickly.