专题五 数词 专题讲义-2026年九年级中考英语一轮复习

专题五  数词 专题讲义

 

一、基数词

类别	规则说明	示例
构成规则	1. 1-12：独立词汇 2. 13-19：个位数+teen（thirteen、 fifteen、eighteen 特殊） 3. 整十数（20-90）：个位数+ ty（twenty、thirty、forty、fifty、eighty 特殊） 4. 几十几：整十数+“-”+个位数 5. 几百几：基数词+ hundred + and +末两位数字	1. one, two...twelve 2. fourteen, sixteen 3. sixty, seventy 4. twenty-one；fifty-five 5. two hundred and eighty-eight
核心用法	1. 表数量/年龄 2. 表编号（名词+基数词） 3. 表时间/年份 4. 特殊搭配： in one’s +整十基数词复数（表 “某人几十岁时”） 复合形容词（基数词+名词单数 /基数词+名词单数+形容词） 时间表达：顺读法或倒读法	1. twelve students（12个学生）；16 years old（16岁） 2. Lesson One（第一课）；Room 802（802号房） 3. in 1998（1998年）；at 6 o’clock（6点） 4. in my twenties（我二十多岁时）；a two-month holiday（两个月假期）；a 100-metre-long bridge（100米长的桥） 5. half past three（3:30）；twenty to five（4:40）；a quarter past five或five fifteen（5:15）

基数词表示数目的多少。其构成和用法如下：

注意

（1）表达 “几百几” 时，hundred后需加 and（美式英语可省略，但英式英语通常保留）；

（2）复合形容词中的名词必须用单数，复合形容词常作定语修饰名词。

 

1.—Look at the triangle on the right, if AC=3, BC=4, how long is AB?

—It’s ______.

A. five B. seven C. twelve

2.There are ________ solar terms (节气) in a year. Lichun is the first one.

A. twenty-four B. twenty-fourth C. the twenty-fourth

3.Two ________ dollars is enough to buy the bike, but I can’t afford ________ it.

A. hundreds; to buy B. hundreds; buy C. hundred; to buy

4.The school art festival is coming. Here’s a survey among 40 students in Class 2 about the activities they want to join in. According to the form below, ________ students choose to draw pictures.

Activities	Singing	Dancing	Drawing pictures	Reading poems
Percentage (百分比)	35%	15%	?	25%

A. 10 B. 20 C. 25

5.—On Tree Planting Day, the students in our school planted five ________ trees on the hill.

—Good job! Everyone can do some things to make our hometown greener.

A. hundreds B. hundred of C. hundreds of D. hundred

 

二、序数词

序数词表示事物的先后顺序，往往与定冠词the连用。基数词变序数词的规则如下：

类别	规则	示例

类别	规则	示例
构成规则	1. 1-3：不规则变化 2. 4-19：基数词+ th（five→fifth；eight→eighth；nine→ninth；twelve→twelfth特殊） 3. 整十数：y变ie+th 4. 21及以上：仅变个位数为序数词	1. one→first；two→second；three→third 2. four→fourth；sixteen→sixteenth 3. twenty→twentieth；thirty→thirtieth 4. twenty-one→twenty-first；fifty-five→fifty-fifth
缩写形式	阿拉伯数字+序数词最后两个字母	first→1st；seventeenth→17th；twenty-second→22nd；thirty-third→33rd

 

 

1.—There is going to be the ________ Art Festival next week.

—Great. We can enjoy some beautiful paintings again.

A. two B. first C. second

2.— This will be my ________ visit to the Sun Island. I’m really excited.

— Really? I can’t believe it. You’ve been in Harbin for a year.

A. first B. second C. third

3.My grandma told me the number “9” stands for “Long lasting”, so I chose the ________ floor to live on.

A. nine B. eighth C. ninth

4.I am ________ child in my family. I have an elder brother and a younger sister.

A. one B. the first C. the second D. the third

5.—It is Mom’s ________ birthday next Wednesday. What should we do?

—What about buying her ________ flowers to show our love?

A. forty; forty B. forty; fortieth C. fortieth; forty D. fortieth; fortieth

 

三、分数、百分数表达法