Please don't talk so fast; I can't understand you.
請不要講那麼快，我聽不懂你說的話。
My brother rides his bike very fast to school.
我哥哥騎腳踏車去學校騎得非常快。
Time goes by faster when we are having fun.
當我們玩得很開心時，時間過得比較快。
Kevin ran the fastest in the sports day race.
凱文在運動會的賽跑中跑得最快。