比較級(jí)構(gòu)成方式：
    A.adj / adv + er / est
    poor→poorer→poorest fast→faster→fastest
    B.詞尾e + r / st
    large→larger→largest fine→finer→finest
    C.重讀閉音節(jié)中短元音 + 輔音詞尾→雙寫輔音詞尾 + er / est.
    big→bigger→biggest hot→hotter→hottest
    D.輔音 + y→i + er / est
    dry→drier→driest angry→angrier→angriest
    E.多音節(jié)形容詞及副詞：
    more + adj / adv most + adj / adv
    F.不規(guī)則變化：
    good / well→better→best bad / ill→worse→worst
    many / much→more→most little→less→least
    late→later→ / latest
    late→latter→last
    far→farther→farthest
    far→further→furthest
    【用法示例】
    比較級(jí)用于二者相比較，由than構(gòu)成比較狀語(yǔ)從句：
    (1) ►. He looks stronger than I(do).
    ►. The climate of Shanghai is hotter than that of Beijing.
    ►. My Schoolbag is larger than hers.
    ►. The book is much more interesting than that one.
    筆記要點(diǎn)：兩個(gè)相比較的主語(yǔ)必須相對(duì)應(yīng)。
    (2) ►. It is getting colder and colder.
    ►. She is becoming more and more beautiful
    . 筆記要點(diǎn)：兩個(gè)形容詞比較級(jí)由 and連在一起，表示“越來(lái)越……”
    (3) ►. The older we grow, the poorer our memory will be.
    ►. The earlier we start, the sooner we'll get there.
    筆記要點(diǎn)：這種句型結(jié)構(gòu)表示“越……越……”
    (4) ►. I prefer the cheaper one of the two books.
    ►. Of the two brothers, he is the cleverer.
    筆記要點(diǎn)：二者之比較。而Of the three girls, she is the cleverest.
    級(jí)構(gòu)成方式：
    三者或三者以上進(jìn)行比較，“the + 形容詞 / 副詞est”。
    (1) John is the tallest of the three.
    He runs fastest in our class.(副詞的級(jí)the可省略)
    This is the most difficult book I've read.
    (2) He is cleverer than any other boy in the class.(有than時(shí)只用比較級(jí))
    She is younger than all the other students.