倍数表达法的讲解(高中英语倍数表达法详解)
倍数表达法的讲解(高中英语倍数表达法详解)
倍数表达法是高中英语学习中的一个重要知识点,也是历年高考的高频考点。本文将系统地讲解倍数表达的各种句型和用法,并通过具体例句帮助读者更好地理解和掌握这一知识点。
倍数表达法是历届高考的热点。当我们要表达甲是乙的几倍时,通常可使用以下句型:
1. 倍数+as+形容词或副词的原级+as+其它
这种结构又常演变成下列两类:
- 倍数+as+many+可数名词复数+as
- 倍数+as+much+不可数名词+as
例如:
- There are seven times as many people as I expected.(是我预料的人数的七倍。)
- There is five times as much coffee in this glass as in that one.(这个杯子里的咖啡是那个杯子里的五倍。)
2. 倍数+形容词(或副词)的比较级+ than+其它
例如:
- The hall is five times bigger than our classroom.(这个大厅的面积比我们教师大五倍。)
3. 计量名词+of+名词+be+倍数+that+of+其它
例如:
- 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。)
4. 倍数+what从句
例如:
- The production is now three times what it was ten years ago.(现在的产量是十年前的三倍。)
5. 倍数+more+名词+than+其它
例如:
- There are nine times more books in his bag than in yours.(他书包里的书比你书包里的书多九倍。)
6. 其它表达
例如:
- She's twice/double my age.(她的年龄是我的两倍。)
- The average income of the staff has been increased by 50 percent compared with last year.(与去年相比,该单位职工的收入已增加了50%。)
- He runs faster than me by three times.(他跑得比我快三倍。)
考查方向
- 倍数在句中的位置一般放在第一个as前面或比较级前面或名词前面。
- 用times表示倍数时,一般只限于表示包括基数在内的三倍或三倍以上的数。表示两倍可以用twice或double,一倍用once.
重点归纳
除了我们初中所学的形容词的比较级的用法,本模块我们主要归纳几种句式结
含倍数的比较句型
- 倍数+as+形容词原级+as…。如:
- This bridge is three times as long as that one.(这座桥是那座桥的三倍长。)
- His room is twice as big as mine;in other words,mine is only half as big as his.(他的房间是我的两倍大;换句话说,我的房间只有他的二分之一大。)
【特别提醒】
“as…as”中间加入名词的句式:
倍数+as+形容词+a/an+可数名词单数+as…
倍数+as+形容词+可数名词复数/不可数名词+as…。如:
Last year my brother twice as big a new house as mine.(去年我哥哥建了一座比我大两倍的新房子。)
He has collected more than three times as many stamps as I (have).(他收集的邮票比我多三倍以上。)
I spent twice as much time on my studies as you did.(我花在学习上的时间是你花的时间的两倍。)
【难点点拨】
该结构的省略:通常省略形容词后面的名词及比较的部分。如:
- I have to transfer(转乘)buses so I spend twice as much (money as others)for the bus every day.(我需要转乘公交车,所以每天在公交车上的花费是别人的两倍。)
- 倍数+形容词比较级+than…。如:
- This street is four times shorter than that one.(这条街是那条街的四分之一长。)
- Fear of danger is ten thousand times more terrifying than danger itself.(对危险的恐惧比危险本身可怕一万倍。)
【特别提醒】
倍数+形容词比较级+名词+than…。如:
- He earns five times more money now than he did ten years ago.(他现在的收入是他十年前的五倍。)
- There are three times more books in our library than in yours.(我们图书馆的书是你们图书馆的三倍。)
- 另外,请注意下面两种说法:
(1) 倍数+what从句。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四倍。)
(2) 倍数+that of+被比较对象。如:
Airmail charges almost twice or three times that of a normal mail.(航空邮件的费用几乎是普通邮件的两到三倍。)
其它句式
- "比较级+and+比较级"表示"越来越…"。如:
- Things are getting better and better every day.(事情一天比一天好。)
- Our country is becoming more and more beautiful.(我们的国家变得越来越美丽。)
- "the+比较级…,the+比较级…"表示“越…,就越…”。如:
- The more you have, the more you want.(拥有的越多,想要的也越多。)
- The more a man knows, the less he knows he knows.(一个人知道得越多,他就越意识到自己知道得越少。)
知识扩展
在形容词比较级前可以加a little, a bit, a lot, no, any, much, far, even,still等副词组表示程度的加深。如:
- The result is much better than we expected.(结果比我们预期的好得多。)
- Actually, health is far more important than wealth.(实际上,健康远比财富重要。)