比較級、倍數(shù)

1、、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 tha n our classroom.這個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

2、桌子的三倍長。one you borrowed fromThis dictionary is five times as thick as the the library.這本詞典的厚度是你從圖書館借的那本（厚度）的5倍。weight, length, width3.“times + the + 名詞（如: size, height,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.“tim

3、es + more +名詞+ than ”例如:He earns five times more money tha n 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.我們班的學生人數(shù)比他們班多兩倍。5.“times +as many （或 much ）+名詞+ as ” 例如:We've Produced twice as muchcotton this year as （ we did ） ten years ago.今年我們生產(chǎn)的棉

4、花比十年前多了一倍。（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 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 p rice of the meat is twice what it was last year.肉價是去年的兩倍。7.“times + upon （或 over ） ” 例如:The siz

5、e of the sun is a millio n 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:Comp ared with last year, our coal out put has in creased by three times.與去年相比，我們的煤產(chǎn)量增長了 3倍。His sp eed is faster tha n mine by four times.他的速度比我的快4倍。9.

6、“times + comp ared with+被比較對象” 例如:The nu mber of the stude nts in our school has in creased for times com pared with 1980.我們學校的學生人數(shù)比1980年增加了 3倍。10.“times + that of +被比較對象”例如:In this worksho p the out putof July was 3.5 times that of January.這個車間七月份的產(chǎn)量是元月份的 3.5倍。、用分數(shù)、百分數(shù)表示倍數(shù)。 例如:The box is on e-third

7、 bigger tha n that one.這個盒子比那個盒子大三分之一。Last year the out put that of 1976.value of industry was 59 percent higher than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 a

8、ga 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 p rice 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 p rocedure tripled the out put.新工藝使產(chǎn)量增加兩倍。The out put of grain in creased fourfold.糧食產(chǎn)量增加了三倍。四、用double表示倍數(shù)現(xiàn)在的產(chǎn)量是十在過去六年中產(chǎn)量已經(jīng)1. double用作形容詞，表示“兩倍的”。如:The P roduct ion is now double what it was ten years ago.年前的兩倍。2. double 用作動詞，表示“是的兩倍。如:The out put has bee n doubled in the p ast