"early"的比较级和最高级分别是 earlier和 earliest。
比较级：
earlier
例句：It's too early to declare his efforts a success.
例句：She arrived earlier than expected.
最高级：
earliest
例句：This is the earliest known example of the species.
例句：By the earliest light of dawn, they had already reached the summit.
希望这些信息对你有所帮助。