比較級、倍數(shù)

1、一、用times 表示倍數(shù)（一般限于包括基數(shù)在內(nèi)三倍或三倍以上的數(shù)。表示兩倍的數(shù)，一般用twice ）。其句式有：1. “times +形容詞/副詞的比較級+ than”例如：Line AB is three times Ion ger tha n line CD.線段AB是（線段）CD的三倍長。This hall is five times bigger than our classroom.這個(gè)大廳比我們的教室大5倍。2. “times +as + 形容詞/副詞的原級+ as”例如：This table is three times as long as that one.這張桌子是那張桌

2、子的三倍長。This dictionaryis five times as thick as the one you borrowed fromthe library.這本詞典的厚度是你從圖書館借的那本（厚度）的 5倍。3. “times + the + 名詞（如：size, height, weight, length, width 等） + of”例如：The earth is 49 times the size of the moon.地球的體積是月球的49倍。This river is three times the depth of that one.這條河是那條河的三倍深。4. “

3、times + more +名詞+ than ”例如：He earns five times more money than he did ten years ago.他現(xiàn)在掙的錢比十年前掙的多 5倍。There are twice more stude nts in our class tha n in theirs.我們班的學(xué)生人數(shù)比他們班多兩倍ten5. “times +as many （或 much ）+名詞+ as ” 例如：We've produced twice as muchcotton this year as （ we did ） years ago.今年我們生產(chǎn)的

4、棉花比十年前多了一倍。（漢語中的多一倍實(shí)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 len gth 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(jià)是去年的兩倍。7. “times + up on （或 over ） ” 例如：The

5、 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 in creased 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 times.他的速度比我的快4倍。9. “

6、times + compared with+被比較對象” 例如:The nu mber of the stude nts in our school has in creased for times compared with 1980.我們學(xué)校的學(xué)生人數(shù)比1980年增加了 3倍。10. “times + that of + 被比較對象” 例如：In this workshop the output of July was 3.5 times that of January.這個(gè)車間七月份的產(chǎn)量是元月份的3.5倍。二、用分?jǐn)?shù)、百分?jǐn)?shù)表示倍數(shù)。例如：The box is on e-third b

7、igger tha n that one.這個(gè)盒子比那個(gè)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 comma nd of En glish is not half so good as yours.我英語掌握得還不及你的一半兒好。三、用 again , double （兩倍）,triple（三倍）,fourfold （四倍）等詞表示倍數(shù)。例如：as large aga in as兩倍于，比大一倍as many aga

8、 in as比多一倍，加倍as much aga in as比多一倍，加倍as old aga in as年紀(jì)比大一倍My Aunt is as old aga in as I am.我姑姑的年齡比我大一倍。The top-bra nd clothes are ofte n sold as double the no rmal pricehere.這里名牌衣服的售價(jià)經(jīng)常比正常的售價(jià)高一倍。The new work procedure tripled the output.新工藝使產(chǎn)量增加兩倍。The output of grain in creased fourfold.糧食產(chǎn)量增加了三倍。四、用double表示倍數(shù)1. double用作形容詞，表示“兩倍的”。如：The product ion is now double what it was ten years ago.現(xiàn)在的產(chǎn)量是十年前的兩倍。2. double 用作動詞，表示“是的兩倍。如：The output has bee n doubled in the past six years.