【正文】 Sth is to sth為主句， what sth is to sth為比較狀語從句。 ① 上述兩例中所展示的句型是可以互換的，而且意 思基本相同。 ▲ Air is to man what water is to fish. 空氣對人類來說猶如水對魚那樣重要。 3. Just as, so（正如 那樣） Sth is to sth what sth is to sth （什么對什么來說 , 猶如什么對什么那樣重要） ▲ Parks are to a city what lungs are to a human body. 公園對城市來說，猶如肺對人體那樣重要。 no richer than = as poor as no faster than = as slowly as no prettier than = as ugly as no quieter than = as noisy as 2. more than（以其說 ，不如說 ） less than （以其說 ，不如說 ） ▲ She is more a man than a girl. = she is less a girl than a man. 以其說她是女孩 ,不如說她是男孩。 ▲ He climbed the tree no faster than his classmate. 他爬樹的速度并不比他的同學(xué)快。 例如： The more money I have, the happier I shall be. 定 賓 主 謂 表 主 謂 附加說明 除上述用法外，比較狀語從句還用于下列場合： 1. no + 比較級（什么不比什么） 2. more than（以其說 ，不如說 ） 3. less than （以其說 ，不如說 ） 4. Just as, so（正如 那樣） 5. Sth is to sth what sth is to sth （什么對什么來說 , 猶如什么對什么那樣重要） 1. no + 比較級（什么不比什么） ▲ She is no richer than I. 她并不比我富裕。 ▲ The busier she is, the happier she will 。 ▲ It is most likely that she will live here forever. 她 很 可能永遠(yuǎn)住在這里。例如： ▲ He is a most disgusting fellow. 他是一個 非常 討厭的家伙。 ③ “ most”可以表示“ 非?！被颉昂堋?的意思。例如： She runs (the) fastest in our class. ② 形容詞最高級前，也可以用“ by far”(最 )來修飾 ,以示強(qiáng)調(diào)。 ① 形容詞最高級前， 必須加定冠詞“ the”。 ▲ Spring is the best season in South China. 春天是華南最好的季節(jié)。 使用最高級時必須有一個比較范圍 。 This girl is a little (a bit or somewhat) more beautiful than that one. 這個女孩比那個稍微漂亮 一點 。 He is the tallest boy in our class. = He is taller than any other boy in our class. She runs the fastest in our class. = She runs faster than any other student in our class. ② 比較級前可用下列單詞或詞組加以強(qiáng)調(diào)： much（ 得多） by far（ 得多） a lot（ 得多） a little（稍微） a bit（一點） somewhat（一點） This problem is by far (much ) more plicated than that one. 這個問題比那個問題復(fù)雜 得多 。 ① 形容詞和副詞的比較級也可以表達(dá)最高級的意思。 ▲ She arrived there earlier than he. 她比他早到那里。 2. 比較級的用法： 兩個事物之間的比較， 表示 “一個比另一個更 ”的意思。 ▲ She didn39。 not as + 形容詞或副詞的原級 + as（和 不一樣）。 2）表示雙方程度不相等時也可用原級。 常用的句型有： as + 形容詞或副詞的原級 + as（和 一樣） I shall give you as much help as I can. = I shall give you help as much as I can. 我會盡力幫助你。 3) No matter which book you like, you can take it away. = Whichever book you like, you can take it away. (定語 ) 不管你喜歡哪一本書，你都可以拿走。ll punish you. = No matter who you are, I39。t pass the exam.（狀語） 不管你多么刻苦學(xué)習(xí)，你都不可能通過這次考試。例如： Even if / though he is honest, he may be misunderstood. = Even if honest, he may be misunderstood. = Even though honest, he may be misunderstood. 6. No matter + wh和 wh + ever的用法與區(qū)別： 1) No matter how hard you study, you can39。 2) 當(dāng)從句中的主語為人稱代詞，謂語有 be動詞時，即可 將主語和 be動詞一起省去 。（看例 4） ③ 下列現(xiàn)象意思相同： Believe it or not = Whether you believe it or not. whether he attends or not = whether or not he attends. Be she beautiful or ugly = Whether she is beautiful or ugly. Be he a friend or an enemy = Whether he is a friend or an enemy. Granting / granted that和 even if / though用法與區(qū)別： 例如： Granting that he is honest, he may be misunderstood. 縱使（即使）他很誠實，他也可能被別人誤解。 不過，必須符合下面這個條件： 當(dāng)讓步狀語從句的謂語為“系”動詞 時，須將“系”動詞以原形的形式置于句首，再加主語和表語， 即： Be +主語 +表語 。 ▲ Whether he is a friend or an enemy, the law considers him as a criminal. = Be he a friend or an enemy, the law considers him as a criminal. 無論 他是朋友 還是 敵人，但法律卻認(rèn)為他是罪犯。ll marry her. = Be she beautiful or ugly, I39。 ▲ Whether you believe it or not, his wife was born in Japan. = Believe it or not, his wife was born in Japan.