初中英语中“倍数”的表达课件

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英语中倍数的表达方法课件 24张PPTPPT下载

注：当相比的对象B很明显时，than （as，of）B常被省去。
2. Increase N times 句型有三种变体：
increase to n times increase n times／n-fold
increase by n times/increase by a factor of n
slow down等词替代
英语中倍数的表达方法课件 24张PPTPPT下载
英语中倍数的表达方法课件 24张PPTPPT下载
第三组： There is a n-fold
decrease/reduction… 应译为：减至1/n [或：减少（n一1）/n]。 Eg. A rapid decrease by a factor of 7 was observed．发现迅速减少到 1/7。
英语中倍数的表达方法和译法
表示倍数的词包括如下一些： times, 数字+fold, (tenfold), by the factor of 数字，（by the factor of 4 )
倍数增加的句型集合
1. Be N times 有三种句型变体： A is n times as great（long，
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2对教育来说，阅读是最基础的教学手段，教育里最关键、最重要的基石就是阅读。
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3但是现在，我们的教育在一定程度上，还不够重视阅读，尤其是延伸阅读和课外阅读。
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4. “山不在高，有仙则名。水不在深，有龙则灵” 四句，简洁有力，类比“斯是陋室，惟吾德馨” ，说明陋室也可借高尚之士散发芬芳
英语中倍数的表达方法课件 24张PPTPPT下载
翻译练习

英语倍数表达法PPT课件

• 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。
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10
10.“… times + more ＋名词＋ than …” 例如： • He earns five times more money than
• A. as three times much • B. as much three times • C. much as three times • D. three times as much
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19
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13
exercises
1. Americans eat ___D_____ 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
• This hill is four times the height of that smal l one 这座山的高度是那座小山的四倍。（比那座小山高三倍）
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4
4.“The + 计量名词 + of + A + be + 倍数 + that + of + B ”
• The size of the newly broadened square is four times that of the previous one. 新扩建的广场为以前的四倍大。

英语中倍数的表达方法课件 24张PPT

英语中倍数的表达方法课件 24张PPT
英语中倍数的表达方法课件 24张PPT
注：在这类句型中increase常被raise， grow，go/step up，multiply等词所替代。
英语中倍数的表达方法课件 24张PPT
英语中倍数的表达方法课件 24张PPT
Increase by 句型翻译的证据这一结构产生误解的概率很高往往误
Population has increased by 200 %in the past 25 years.
人口在过去 25 年内增加了 200 % (即增加两倍) 。
its output of cotton went up by 20 percent. 它的棉花产量增长了20 % 。
英语中倍数的表达方法课件 24张PPT
英语中倍数的表达方法课件 24张PPT
英语中倍数的表达方法课件 24张PPT
翻译练习
1.This book is three times as long as that one.
2. The dictionary is exactly five times more expensive than that one.
5. The drain voltage （漏电压） has been increased by a factor of four.
6. The output of chemical fertilizer has been raised five times as against l986．
英语中倍数的表达方法课件 24张PPT
英语中倍数的表达方法课件 24张PPT
7. If the resistance is doubled without changing the voltage ,the current becomes only half strong.

英语倍数表达法课件

Special expressions for English multiple The structure of "multiple+more+noun+than"
Summary word: This structure is used to express how many times a quantity is greater than another quantity, and emphasizes that this quantity is less than another quantity.
Summary word: This structure is used to express how many times a quantity is equal to another quantity, and emphasizes that this quantity is equal to another quantity.
Avoid using inappropriate comparative structures
01
Comparison objects should have similarity: When comparing two objects, it is important to ensure that they have similarity in certain aspects for a reasonable comparison.
Detailed description
The basic form of this structure is "multiple+as+objective+as", where "multiple" represents a multiple, "as" is a conjunction, and "objective" is an adjective used to describe the properties of the compared object. "as" is followed by another compared object. For example, "two as high as" means "twice the height of...".

英语中倍数的表达方式归纳 PPT

(has)、 He has got three times as many books as
his sister (has)、
倍英语中“倍数”得表达方式归纳数
6、 “… times + what 从句” 例如:
The length of the road is four times what it was three years ago、这条路得长度就是三年前得 4 倍。 The price of the meat is twice what it was last year、肉价就是去年得两倍。
倍英语中“倍数”得表达方式归纳数
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、我姑姑得年龄比我大一倍。 The top-brand clothes are often sold as double the normal price here、这里名牌衣服得售价经常比正常得售价高一倍。 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。
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)、

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［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.