考點一： 原級比較一般用 as … as ; not as … as ; the same … as ;
特殊結構 A is to B what / as X is Y ; A+倍數或幾分之幾 as + adj. / adv. + as +B.
The work is not as difficult as you think.
Air is to us as water is to fish. 我們與空氣的關系就像魚和水的關系。
This book is twice as thick as that one.
考點二：比較級常用結構 A ＋比較級 ＋ than + B
特殊結構：the more … the more (越……越……)； more and more (越來越)
This question is less difficult than that that question. (比較對象為彼此獨立的人或事物)
Iron is more useful than any other metal. (比較對象具有所屬關系， 含有最高級含義)
The city is becoming more and more beautiful.
考點三：以拉丁文-ior結尾的含有比較意義的形容詞后接to 而不是than. 這些詞是：
superior, inferior , senior , junior , major , minor, anterior, prior(在。。。之前) ,
posterior (在。。。之后)
He is three years senior to me.
This type of computer is superior to that type.
考點四：最高級用于三者以上的事物之間的比較，所以比較的范圍自然是少不了。一般表示地方用介詞in; 表示所屬關系和人物比較用介詞 of. ( 即the +最高級＋in /of …)
The Yangtze River is the longest river in China, but it is the third longest river in the world.
The youngest member of the family is most successful.
Of all forms of energy, electricity is most widely used.
考點五：在 more … than 結構中， than 有時可看作關系代詞，相當于than what…
There ought to be less anxiety over the perceived risk of getting cancer than exists in the public mind today. (Than = than what…)
人們不應該像今天這樣擔心害怕患上癌癥。
There are more wonders in heaven and earth than are dreamt of. ( than=than what…)
天地間的奇跡比人們所夢想的要多得多。
The medicine is more effective than is expected.
考點六：英語中有一小部分表示絕對意義的形容詞沒有比較級和最高級。如：
dead, deaf, empty, total, whole, perfect, complete, right, wrong, equal, daily false, final
absolute, alone, round, pregnant, square, supreme, unique, straight, eternal, unanimous
考點七：幾組由 “more than ；more … than” 和“no / not ＋ 比較級” 等構成的慣用句式及其含義。
more than 其含義為: “不僅是， 非常， 十分”等， 用法和意義較多。
more …than 其含義可以是: “與其說……不如說， 不是……而是”
What we are doing today is more than donating some money.
今天我們所做的不只是捐一些錢。
Their action was more than justified. 他們的行動是完全有理由的。
He is more brave than wise. 他有勇無謀。
The book seems to be more a dictionary than a grammer.
這本書看起來與其說是一本語法書，不如說是一本詞典。
no more than 強調少，意為“只有，不過，僅僅”
not more than 客觀敘述，意為“不超過”
He has no more than five dollars on him.
他身上僅有5美元。(強調少)
He has not more than five dollars on him.
他身上帶的錢不超過僅有5美元。(強調數額少于5美元)
no more … than含有消極否定的意思，可譯為“A與B都不…，不… 也不”
not more … than 含有積極、肯定的意思，表示程度上的差異。
He is no more diligent than you.
他不勤奮，你也不勤奮。(兩人都不勤奮)
He is not more diligent than you.
他沒有像你那樣勤奮。(兩人都勤奮，但你更勤奮)
no less than = as much as 意為：“竟有…之多，多達”強調多
not less than 意為“不少于，至少”，可觀地描述
no less … than 前后均為肯定，含有驚奇的感情色彩�？勺g為：“是…是， 正是， 和 … 一樣， 多達，應有…之多”
His son has read no less than 50 English books.
他的兒子竟然讀了50本英文書。(強調多)
His son has read not less than 50 English books.
他的兒子讀了不少于50本英文書。(不強調多或少)
The middle-aged man was no less a person than the new minister.
這位中年人正是新來的部長。
Her voice is no less sweet than it used to be.
她的歌聲和以前一樣甜美。
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