知识要点
1)英语中大多数形容词、副词是可以分等级的，一般有三个等级：原级，比较级和最高级。形容词、副词的本来形式就是形容词的原级。如：John is a tall boy.两者间进行比较用到形容词比较级。如：Jim is taller than John.三者或者三者以上进行比较用形容词的最高级。Mike is the tallest of the three boys.(形容词最高级前面要加定冠词the)
2).形容词、副词比较级和最高级有规则变化和不规则变化
规则变化
①单音节或双音节的形容词（或副词）比较级＋er最高级＋est small－smaller－smallest等
②以e结尾的词，比较级＋r，最高级＋st即可nice－nicer－nicest
③以辅音字母＋y结尾的，变y为i＋er或est easy－easier－easiest
④双写最后一个辅音字母＋er或est hot－hotter－hottest
⑥ 一些双音节及多音节形容词或副词前要加more和most，如：
difficult---more difficult---most difficult
不规则变化：
good/well－better－best,bad－worse－worst many/much－more－most little－less－least
far－further －furthest（表示程度） far－farther－farthest（表示远近） old－older－oldest（表新旧） old－elder－eldest（表兄弟姊妹之间的长幼）
3).比较级前的修饰词：a little, a lot, much, even; far; still
4)形容词、副词比较级的特殊用法
①形容词/副词比较级+than+ any other+单数名词(+介词短语)"表示"比同一范围的任何一个人/物都……"，含义是"最……"。
例如，Mike gets to school earlier than any other student in his class.
= Mike gets to school earlier than any of the other students in his class. = Mike gets to school earlier than the other students in his class. = Mike gets to school earliest in his class.注意：Mike gets to school earlier than any student in Tom's class.