early本身就既是形容词又是副词。
early
adj. 早期的；早熟的
adv. 提早；在初期
n. (Early)人名；(英)厄尔利
[ 比较级 earlier 最高级 earliest ]
例句
Early booking is recommended.
请提早订票。
Shooting began early this year.
拍摄于今年初开始。
They determined to start early.
他们决定早点出发。
I\'m used to getting up early.
我习惯早起。
