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初中英语中“倍数”的表达课件
[巩固练习]
Americans eat ________ vegetables per person today as they did in 1910. A. more than twice B. as twice as many C. twice as many as D. more than twice as many Key: D
倍英语中“倍数”的表达方式归纳 数
4. “… times + more +名词+ than …” 例如:
He earns five times more money than he did ten years ago. 他现在挣的钱比十年前挣的多 5 倍。 There are twice more students in our class than in theirs. 我们班的学生人数比他们班多两倍。
倍英语中“倍数”的表达方式归纳 数
10. “… times + that of + 被比较对象” 例如:
In this workshop the output of July was 3.5 times that of January. 这个车间七月份的产量是元月份的 3.5 倍。
倍英语中“倍数”的表达方式归纳 数
[巩固练习]
This ship measures ________ that one. A. as twice as long B. as twice long as C. twice long as D. twice as long as Key: D
[巩固练习]
After the new technique was introduced, the factory produced _______ tractors in 1988 as the year before A. as twice many B. as many as C. as twice as many D. twice as many Key: D
[巩固练习]
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 Key: C
[巩固练习]
Paper produced every year is _______ the world's production of vehicles. A. the three weight of B. three times the weight of C. as three times heavy as D. three times as heavier as Key: B
This table is long. This table is as long as that one (is). This table is three times as long as that one (is). This dictionary thick. This dictionary is as thick as that one (is). This dictionary is five times as thick as that one (is). This dictionary is five times as thick as the one you borrowed from the library (is).
倍英语中“倍数”的表达方式归纳 数
2. “… times +as + 形容词 / 副词的原级+ as …” 例如:
This table is three times as long as that one. 这张桌子是那张桌子的三倍长。 This dictionary is five times as thick as the one you borrowed from the library. 这本词典的厚度是你从图书馆借的那本(厚度) 的 5 倍。
倍英语中“倍数”的表达方式归纳 数
三、用 again (一倍)double (两倍),triple (三 倍)fourfold (四倍)等词表示倍数。例如:
My Aunt is as old again as I am. 我姑姑的年龄比我大一倍。 The top-brand clothes are often sold as double the normal price here. 这里名牌衣服的售价经常比正常的售价高一倍。 The new work procedure tripled the output. 新工艺使产量增加两倍。 The output of grain increased fourfold. 粮食产量增加了三倍。
倍英语中“倍数”的表达方式归纳 数
一、用 times 表示倍 )。其句式有: 1. “… times +形容词 / 副词的比较级+ than …” 例如:
Line AB is three times longer than line CD. 线段 AB 是(线段) CD 的三倍长。 This hall is five times bigger than our classroom. 这个大厅比我们的教室大 5 倍。
倍英语中“倍数”的表达方式归纳 数
7. “… times + up on (或 over )…”例如:
The size of the sun is a million times over that of the earth. 太阳的体积比地球的体积大一百万倍。 He is three times up on your age. 他的年龄是你的 4 倍(或:比你的年龄大 3 倍)。
倍英语中“倍数”的表达方式归纳 数
6. “… times + what 从句” 例如:
The length of the road is four times what it was three years ago. 这条路的长度是三年前的 4 倍。 The price of the meat is twice what it was last year. 肉价是去年的两倍。
二、用分数、百分数表示倍数。例如:
The box is one-third bigger than that one. 这个盒子比那个盒子大三分之一。 Last year the output value of industry was 59 percent higher than that of 1976. 去年工业产值比 1976 年增长了 59 %。 My command of English is not half so good as yours. 我英语掌握得还不及你的一半儿好。
倍英语中“倍数”的表达方式归纳 数
9. “… times + compared with +被比较对象” 例如: The number of the students in our school has increased for times compared with 1980. 我们学校的学生人数比 1980 年增加了 3 倍。
We„ve produced much cotton this year We„ve produced as much cotton this year as ( we did ) ten years ago. We„ve produced twice as much cotton this year as ( we did ) ten years ago. He has got many books. He has got as many books as his sister (has). He has got three times as many books as his sister (has).
英语中“倍数”的表 达方式归纳
倍数英语中“倍数”的表达方式归 纳
The house rent is expensive. I've got about half the space I had at home and I'm paying _______ here. A. as three times much B. as much three times C. much as three times D. three times as much 正确答案为 D
倍英语中“倍数”的表达方式归纳 数
8. “… +by + … times ”例如:
Compared with last year, our coal output has increased by three times. 与去年相比,我们的煤产量增长了 3 倍。 His speed is faster than mine by four times. 他的速度比我的快 4 倍。
Line AB is long. Line AB is longer than line CD. Line AB is three times longer than line CD.
This hall big. This hall bigger than our classroom. This hall is five times bigger than our classroom.