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每Dsp
语法纸
Day61数词的用法
一、分数小数百分数的表达
3.常见的表示约数的短语
1.分数的表达
scorc5of几十个（色40）
dozens of几十个224)
(1)分子用基数词，分母用序数词：分子大于1时.分母用复数.
undreds of数以百计
thousands of数以千计
e.g.L/3 one third:3/5 three fifths
millions of数以百万计
hillions of数以十亿计
(2)分数大于一，要用“整数部分+ad+分数来表示。
4.the number of+名词，意为“.…的数昼”，作主语时，谓语动词用单数；a
e.g83/5 eight and three fifths
number of+名词，意为“许多”，作主语时，谓话动词用复数.
(3)分母若是2利4，可分别月half和quarter表示，分子是一的时候可用a,
eg.The number of students in my class is fifty.我班学生的数景是五十.
e.g.l2 aone half(注意不能用one secand):34 three quarters=three fourths
A number of students choose to play football after school.许多学生选择果后踢足
2。小数的表达
球
小数点前后都用基数词，小数点读作ot,其左边的整数按基数词读。其右边三、倍数的表达
的数字从左往右逐个读。
倍数表达：两倍用twicc,三倍及以上用“基数词+imcs”.
c.g.3.1415读f作：three point one fouronfive
1(1)A+倍数+3+形容词剧词原敏+as+B,意为“A是B的儿倍”.
3.百分数的表达
c.g.Our school is twice as large as theirs5.我们学校是他们学校的两倍大.
基数词+%，百分号楼作per cent/pcrcent.
(2)A+倍数+形容词副词比较级+ha+B,总为“A是B的儿倍.
e.g.9%nine per cent
e-g.The imngl wi,er is almost【wice longer han the Pearl River..长江大凝比练
4.“分数或百分数+f+名词“作主语，诩语动词的数由名词决定.
江长两倍
eg.Th:eequrof appleseresod to them.四分之三的节果被卖给了衣肠.()A+形容词f副词比牧级+than+比较对象+by+倍数+B,意为“A是B
Sixty per ccnt of water is still elean.百分之六十的水依I旧是净的。
的几倍”.
二、数的表达
c-g,The price of this computer is more expensive than that one by twice..这台电脑
L.表示大约"常用about,.around,,nearly,approximately,roughly.
的价格是那台电脑的两倍。
eg.about ten metres大约十米
(4④A+倍数+hc+sizc/length/weight...+of+B.意为"A是B大小/长度重
2.常用dozn(十二；一打)扩，score(仁十)等，表示确数，用法与基数词一致.承的几倍.
e.g.two dozen eggs两打鸿
e.g,This table iswice the sie of that one,.这张桌子是那张桌子的两倍，
一虚装对折.上记活法下端恶
Day61语法专练
姓名：
日期：
耗时：
一、单项选择
6.一Our country is the
largest land area in the world.
l.The side of a square is2cm.The area of a plane figure(平面图形)is3 times
It is a beautiful country.about
of the land is covered with trees and
as big as the square,what's the area of this plane figure
erass.
A.Four square centimeters.
B.Eight square centimeters.
A.three;two fifth
B.third;two fifth
C.Six square centimeters.
D.Twelve square centimeters.
C.three:two fifths
D.third:two fifths
2.
of that country
by snow.
7.Shakespcare is my favorite writer.A book says that
of his plays were
A.Second thirds;is covered
B.Two thirds;is covered
written in his
C.Two thirds;are covered
D.Two third:covers
A.one thirds;fifties
B.one third;fifty
3.There are
teachers in our school,
of them are
C.one third;fiftics
D.onc thirds;fifty
A.two hundreds;four fifth;women workers
8.1
people are waiting in line.
B.two hundred:four fifths;women workers
them is about three hundred.
C.two hundred;fourth fifths;woman workers
A.A number of.A number of
B.The number of;A numher of
D.two hundreds:fourth fifths;women workers
C.The number of;The number of
D.A number of;The number of
4
of the workers in the computer factory is about two thousand,and
9.The Book City downtown is at least
the one in the rural area.
of them are women workers.
A.three times as big as
B.as big three times as
A.The number;second third
B.A number;three quarters
C.as three times big as
D.three times big as
C.A number;half second
D.The number;two thirds
10.-China is a great country with a history of about more than 5
5.-How do the students usually go to school
years.
-About
of the students in our school
to school by bus
-Yes.And
foreigners come to visit it every year.
A.two fifth;go
B.two fifths;go
A.thousand;million
B.thousands;million of
C.two fifth;gocs
D.two fifths;gocs
C.thousand:millions of
D.thousand of;million每Dssp
语法纸》
Day61语法专练【解析】
1.D解析：首先计算正方形的面积，正方形面积公式为边长×边长，已知边长是2cm,所以正方形面积是
2×2-4平方厘米。因为平面图形的面积是正方形面积的3倍，所以该平面图形面积为4×3-12平方厘米。故
正确答案是D。
2.B解析：首先分析第一空，hundred前有具体数字时，用单数形式，“two hundred''表示“两百”，所以排
除A、D选项。接着看第二空，分数的表达方式为：分子用基数词，分母用序数词，当分子大于1时，分母
要加“s”,“五分之四”应表达为“four fifths'”,所以排除C选项。最后看第三空，“woman'和man”作定语修饰
复数名词时，其本身也要变成复数形式，“女工人”应表达为“women workers'”。综上，答案是B.
3.B解析：首先分析第一空，hundred前有具体数字时，用单数形式，“wo hundrec表示两百”，所以排
除A、D选项。接着看第二空，分数的表达方式为：分子用基数词，分母用序数词，当分子大于1时，分母
要加“s”,“五分之四”应表达为“four fifths"”,所以排除C选项。最后看第三空，“woman'和“man”作定语修饰
复数名词时，其本身也要变成复数形式，“女工人”应表达为women workers'”。综上，答案是B。
4.D解析：'the number of-+名词复数”表示“..的数量”，作主语时，谓语动词用单数；“a number of+名
词复数表示“许多，大量”，作主语时，谓语动词用复数。第一空根据is about two thousand”可知说的是数量，
用the number of;第二空表示三分之二”，分数表达是分子用基数词，分母用序数词，分子大于1时，分
母加“s”,“三分之二”是“two thirds'”。因此，正确答案是D
5.B解析：分数的表达是分子用基数词，分母用序数词，分子大于1时，分母加“s”,“五分之二”是“tw0ifts”;
“分数+of+名词”作主语时，谓语动词的单复数由of后面的名词决定，此句中“students”是复数，所以谓语
动词用“g0”。故正确答案是B。
6.D解析：第一空表示“第几”用序数词，“第三”是third'”;第二空表示分数“五分之二”，分数表达是分子用
基数词，分母用序数词，分子大于1时，分母加s”,所以是“two fifths'”。因此，正确答案是D。
7.C解析：分数的表达是分子用基数词，分母用序数词，分子人于1时，分母加“s',“三分之一”是one third”;
in one's+整十的复数”表示“在某人几十多岁时”，“在他五十多岁时”是“in his fifties'”。故正确答案是C。
8.D解析：“a number of+名词复数”表示“许多，大量”，作主语时，谓语动词用复数；“the number of+名
词复数”表示“.的数量”，作主语时，谓语动词用单数。第一空表示“许多人排队”，用'a number of';第二
空根据'is about three hundred''可知说的是数量，用'the number of'。因此，正确答案是D。
9.A解析：倍数的表达结构是倍数+as+形容词原级+as”,所以“是..的三倍大”应表达为three times
as big as”,故正确答案是A.
10.C解析：thousand和million前面有具体数字时，用单数形式；前面没有具体数字，后面与of连用时，
用复数形式，“millions of表示“数以百万计的”。第一空前面有“5”，用thousand'';第二空表示“数以百万计
的外国人”，用millions of'。因此，正确答案是C.

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