1、.,英語倍數(shù)表達(dá)法,.,一、用 times 表示倍數(shù) 1. “A + be + 倍數(shù) + as + 計量形容詞原級 + as + B”。 This tree is three times as tall as that one. 這棵樹是那棵樹的三倍高。 His father is twice as old as he. 他父親的年紀(jì)有他兩倍大。,.,2. “A + be + 倍數(shù) + 計量形容詞比較級 + than + B ” The Yangtze River is almost twice longer than the Pearl River. 長江差不多比珠江長兩倍。 The dic

2、tionary is exactly five times more expensive than that one. 這本字典比那本恰好貴5倍。,.,3.“A + be + 倍數(shù) + the + 計量名詞 + of + B ” The newly broadened square is four times the size of the previous one. 新擴建的廣場是未擴建時的四倍大。 Thishillisfourtimestheheightofthat smallone 這座山的高度是那座小山的四倍。（比那座小山高三倍）,.,4.“The + 計量名詞 + of + A +

3、be + 倍數(shù) + that + of + B ” The size of the newly broadened square is four times that of the previous one. 新擴建的廣場為以前的四倍大。 Theheightofthishillisfourtimesthatofthatsmallone,.,5. “ times +as many （或 much ）名詞 as ”例如： Weve produced twice as much cotton this year as （ we did ） ten years ago. 今年我們生產(chǎn)的棉花比十年前多了

4、一倍。（漢語中的多一倍實際上也指兩倍一樣多。） He has got three times as many books as his sister. 他擁有的書的數(shù)量是他妹妹的 3 倍。,.,6. “ times + what 從句”例如： The length of the road is four times what it was three years ago. 這條路的長度是三年前的 4 倍。 The price of the meat is twice what it was last year. 肉價是去年的兩倍。,.,7. “ times + up on （或 over ）”

5、例如： The size of the sun is a million times over that of the earth. 太陽的體積比地球的體積大一百萬倍。 He is three times up on your age. 他的年齡是你的 4 倍（或：比你的年齡大 3 倍）。,.,8. “ +by + times ”例如： Compared with last year， our coal output has increased by three times. 與去年相比，我們的煤產(chǎn)量增長了 3 倍。 His speed is faster than mine by four

6、times. 他的速度比我的快 4 倍。 Compared with last year, our coal output has increased by three times.,.,二、用分?jǐn)?shù)、百分?jǐn)?shù)表示倍數(shù),The box is one-third bigger than that one. 這個盒子比那個盒子大三分之一。 Last year the output value of industry was 59 percent higher than that of 1976. 去年工業(yè)產(chǎn)值比 1976 年增長了 59 。 My command of English is not h

7、alf so good as yours. 我英語掌握得還不及你的一半兒好。,.,三、用 again （一倍）， double （兩倍）， triple （三倍）， fourfold （四倍）等詞表示倍數(shù)。,My Aunt is as old again as I am. 我姑姑的年齡比我大一倍。 The top-brand clothes are often sold as double the normal price here. 這里名牌衣服的售價經(jīng)常比正常的售價高一倍。 The new work procedure tripled the output. 新工藝使產(chǎn)量增加兩倍。 The

8、 output of grain increased fourfold. 糧食產(chǎn)量增加了三倍。,.,exercises,1. Americans eat _ vegetable per person today as they did in 1910. A. more than twice B. as twice as many C. twice as many as D. twice as much,D,.,2. Paper produced every year is _ the worlds production of vehicles. A. the three weight of B

9、. three times the weight of C. as three times heavy as D. three times as heavier as,B,.,3.With the help of the German experts， the factory produced _ cars in 1993 as the year before. A. as twice many B. as many twice C. twice as many D. twice many as,C,.,4. This ship measures _ that one. A. as twice as long B. as twice long as C. twice long as D. twice as long as,D,.,5. After the new technique