1.dozen
(1)意為“12個,1打”,前有基數(shù)詞時不用復數(shù),可以省略of。
two dozen (of)eggs 兩打雞蛋 two dozen pencils 兩打鉛筆
dozens of eggs 幾打雞蛋 a dozen pieces 很多片
several dozen socks 幾打襪子
(2)在人稱代詞、指示代詞、物主代詞前,of不可省。
a dozen of them 他們中十二個
two dozen of these books 這些書中的兩打
a dozen of your eggs 你的一打雞蛋
(3)泛指時dozens后的of不可省。
many/several/a few dozens of 數(shù)打
dozens of people 幾十個人
2.score
(1)意為“20個”,前有基數(shù)詞時不用復數(shù),一般不省略of。
three score of eggs 六十只雞蛋
several scores of ships 好幾十條船
a score of times 許多次
a score of them 他們中的二十個
two score of these books 這些書中的四十本
(2)泛指時用復數(shù)
scores and scores of people 許多人
3.“大約數(shù)”的表達
(1)大于某數(shù)的表示法:用more than,over,or more
more than/over fifty people 五十多個人
children of fourteen and over 十四歲和十四歲以上的少年
sixty students or more 六十或六十多個學生
(2)小于某數(shù)的表示:用less than,under,almost,nearly,below
It cost me less than 10 pounds.我買它花了不到10英鎊。
Children under six years old are admitted free.未滿6歲的兒童可免費入場。
It’s nearly/almost 10 o’clock.快10點了。
The temperature is five degrees below zero.溫度是零下5度。
(3)其他表示:用or,or so,about,around,round,some,more or less
I’ll come back in three or four days.我過三四天就回來。
We stayed an hour or so.我們停留了一個小時左右。
It will cost around/round/about 100 dollars.那大概要花100美元。
Some 100 people attended the meeting.大約100人參加了會議。
I read more or less forty pages last night.我昨晚看了大約40頁。
【提示】 “一兩分鐘”通常用a minute or two或one or two minutes。
【高考演練】
1.【浙江】I like this jacket better than that one,but it costs almost three times________.
A.as much B.as many C.so much D.so many
【答案】A 倍數(shù)表達方式之一就是“倍數(shù)+as ...as結構”。此句中第二個as和后面的內容都省略了。補充完整應該是...as much as that one?!板X多”概念應該用much。故選A。
2.【北京】She went to the bookstore and bought________.
A.dozen booksB.dozens books
C.dozen of booksD.dozens of books
【答案】D 句意:她到書店買了數(shù)十本書。表示約數(shù)時用“數(shù)詞的復數(shù)形式+of”結構。
3.【浙江】The company had about 20 notebook computers but only one-third________used regularly.Now we have 60 working all day long.
A.is B.are C.was D.were
【答案】D 句意:這個公司過去有二十臺筆記本電腦,但只有1/3能正常使用?,F(xiàn)在我們有六十臺可以使用。由but前的分句中had判斷知句子應用一般過去時。分數(shù)(1/3)作主語時謂語動詞根據(jù)分數(shù)所代表的名詞而定;句中的1/3代指computers,故謂語動詞用復數(shù)。故選D。
4.【上?!縚_______ of the land in that district________covered with trees and grass.
A.Two fifth;isB.Two fifth;are
C.Two fifths;isD.Two fifths;are
【答案】C 句意:那個地區(qū)五分之二的土地都覆蓋著草地和樹木。分數(shù)的分子用基數(shù)詞,分母用序數(shù)詞表示。如果分子大于1,序數(shù)詞后加-s。分數(shù)和百分數(shù)做主語時,謂語動詞的形式取決于分數(shù)和百分數(shù)后的名詞。句子中的主語land是單數(shù),所以謂語動詞要用is covered.故選C。
5.【湖北】What a table! I’ve never seen such a thing before.It is________it is long.
A.half not as wide asB.wide not as half as
C.not half as wide asD.as wide as not half
【答案】C 倍數(shù)的表達方式之一:A+is+倍數(shù)+as+adj.+as+B,意為“A是B的……倍”。故選C。
6.【上海】At a rough estimate,Nigeria is________Great Britain.
A.three times the size asB.the size three times of
C.three times as the size ofD.three times the size of
【答案】D 句意:據(jù)粗略估算,尼日利亞是英國的三倍大。A is ...time the size of B.A是B的……倍大。故選D。
7.【遼寧】The factory produces half a million pairs of shoes every year,80%________are sold abroad.
A.of which B.which of C.of them D.of that
【答案】A 句意:這家工廠每年生產50萬雙鞋,其中80%銷往國外。80% of which指的是80% of the shoes,其中80%是百分數(shù),作定語從句的主語。故選A。