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专题04.数词精讲
考点导图
知识1 数词的分类
一、基数词
一至十 十一至二十 二十一至三十 整十及一百
1 one 11 eleven 21 twenty-one -
2two 12 twelve 22 twenty-two -
3 three 13 thirteen 23 twenty-three -
4 four 14 fourteen 24 twenty-four 40 forty
5 five 15 fifteen 25 twenty-five 50 fifty
6 six 16 sixteen 26 twenty-six 60 sixty
7 seven 17 seventeen 27 twenty-seven 70 seventy
8 eight 18 eighteen 28 twenty-eight 80 eighty
9 nine 19 nineteen 29 twenty-nine 90 ninety
10 ten 20 twenty 30 thirty 100 one hundred
注意
1．基数词1～12需单独记忆。
2．基数词13～19是在个位数词的词干后加-teen 构成，其中thirteen，fifteen，eighteen 变化不规则，先分别记住three，five，eight三个词的末尾变化，再加-teen。
3．基数词20～90的整十数是在2～9的基数词后面加-ty构成，其中twenty，thirty，forty，fifty，eighty 变化不规则。
二、序数词
序数词 数字法 序数词 数字法 巧学妙记 基变序，有规律，末尾加上-th。 一二三，特殊记。 八加h，九去e，f来把ve替。 词尾y变ie，再加-th。 多位数，只变个位就可以。
first 1st 11th
second 2nd 12th
third 3rd 20th
fourth 4th 21st
fifth 5th 22nd
sixth 6th 23rd
seventh 7th 24th
eighth 8th 100th
ninth 9th 101st
tenth 10th
知识2 数词的用法 重点
一、基数词的用法
1．表示年份、年代
（1）年份用基数词表达，年份前用介词in。
在1999年 in 1999（读作in nineteen ninety-nine）
在2001年in2001（读作in two thousand and one）
（2）年代用“in the + 整十基数词的复数”表示。
在21世纪20年代 in the 2020s（读作 in the twenty twenties)
2．表示年龄
（1）直接用“基数词（＋years old）”，表示“······岁”。
His grandfather is 80/ eighty ( years old ).
他爷爷80岁了。
（2）at the age of＋基数词。
at the age of four 在四岁的时候
（3）“in one’s＋整十基数词的复数”，表示“在某人几十多岁的时候”。
in his thirties 在他三十多岁的时候
3．表示顺序和编号、电话号码
编号的事物要用基数词表示顺序，但是基数词要后置，通常表达为“名词＋基数词”。
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4．重点 hundred、thousand、million的用法
用法 示例
表示确切的数字：hundred, thousand,million 等词与具体的数字（如 two，three，five等）连用时，不变复数 五／几千年 There are books on the shelf.书架上有两百本书。
表示不确切的数字：hundred, thousand,million 等词的复数形式与of连用时，前面不能再加数字（如two，three，five等） 数百万 成千上万 hundreds of thousands of 几十万 There are books in the room. 房间里有数百本书。
二、序数词的用法
类别 用法 示例
表示顺序 序数词前通常加the，其后接单数名词 the first lesson 第一课 Our classroom is on the second floor of Building 2.我们的教室在2号楼的二楼。
表示日期 日期用“the ＋序数词”表示 National Day is on the 1st of October． 国庆节是10月1日。 May 5五月五日 （读作May the fifth 或 the fifth of May) Mar．1（st）三月一日 （读作 March the first或 the first of March)
表示世纪 世纪可以用“the＋序数词＋century”表示 in the sixth(6th) century 在6世纪 in the eighteenth(18th) century 在18世纪
注意点
1．序数词前有形容词性物主代词或名词所有格限定时，不再加定冠词。例：
Tomorrow will be my birthday.明天将是我弟弟的九岁生日。
2.a/an+序数词，表示“又一，再一”。例：
We'll go over it time.我们会再仔细检查一遍。
We've tried it three times. Must we try it a time？我们尝试过三次了，还必须再尝试一次吗？
3．序数词还可以作副词，表示“第几名”。例：Who came first in the race？赛跑谁第一？
4．表示某人第几次做某事，可用结构“It／This is the first/second/... time(that) sb. have done sth.”。例：
This is the first time (that) I've been to London.这是我第一次去伦敦。
三、分数和小数的表达
1．难点 分数的表达法
分子基，分母序；分子大于1，分母变复数。
1/3 one third, 2/3 two thirds,3/5 three fifths
特别记住：1/2 a half, 1/4 a quarter, 3/4 three quarters。
2．小数的表达法
小数点读作point，其左边的整数按基数词的读法，其右边按照数字本身逐个读出。
0.38 zero point three eight
96.89 ninety-six point eight nine
107.509 one hundred and seven point five o/zero nine
数词考点综合练
一、用括号中所给词的适当形式填空。
1．Though the boy has failed twice, we'd better give him a ______（three） chance to show his skills.
2．She is fifteen, and next year she is going to celebrate her ____________（sixteen）birthday.
3．The old man started to learn how to surf the Internet in his __________（eighty）.
4．The students can make up to nine ________（hundred） dollars a day.
5．—China is a great country with a history of about five __________ years.
—Yes. And ____________ of foreigners come to visit it every year. （thousand）
6．My grandma told me the number “9” means “long lasting”. So I chose the ______（nine） floor to live on.
二.单句填空
1．[2024长沙明德模拟]The ______（one） part refers to eight separate movements. And the second part refers to the stretch（舒展） and beauty of the movements.
2．[2024衡阳模拟]In fact, the reverse side of the ______（five） series of renminbi banknotes shows the most fascinating landscapes in the country.
3．[2024山东东营改编]I am the________（two） child in my family. I have an elder brother and a younger sister.
4．[2023怀化改编]People plant __________（hundred） of trees on Tree Planting Day every year.
5．[2023郴州改编]Dongjiang Lake is a good place to have fun and ____________（thousand） of tourists go camping there in summer.
6．[2023张家界改编]The Lantern Festival is a traditional festival in China. It is celebrated on the 15th day of the ______（one） month of the lunar year.
7．[2023永州一模]—Have you ever been to Jiuyishan National Forest Park
—Of course. I have been there four times. And I would like to visit it a ______（five） time.
8．[2022长沙一模]The ______（one） modern Olympic Games were held in Athens, Greece, in 1896.
9．[2022长沙联考]The beach is so famous that __________（million） of tourists put it on their wish lists.
三.数词填空
A
China is a great country with a history of about 5,000 years. These days 1. （million） of foreigners come to visit it every year. Some of them even marry Chinese girls and live in China. Mr. Smith comes from Germany, and his wife Li Ying is from Hunan. They live in a tall building with 2. （十八） floors in Beijing. Their family lives on the 3. （twelve） floor. They have a daughter and a son. On June 9, the 4. （three） day of gaokao, Li Ying waited for her son outside the school where he was taking his test after work.
B
Nowadays, many Chinese leave the countryside to search for work in cities. Mrs. Zhang is 5. of them. She hasn’t been home for two years. She is in her 6. （thirty） and she has two sons. She loves them and misses them so much. Last month, she gave her older son a new bicycle for his 7. （nine） birthday. Her 8. （two） son is only eight months old.
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21世纪教育网(www.21cnjy.com)专题04.数词精讲
考点导图
知识1 数词的分类
一、基数词
一至十 十一至二十 二十一至三十 整十及一百
1 one 11 eleven 21 twenty-one -
2two 12 twelve 22 twenty-two -
3 three 13 thirteen 23 twenty-three -
4 four 14 fourteen 24 twenty-four 40 forty
5 five 15 fifteen 25 twenty-five 50 fifty
6 six 16 sixteen 26 twenty-six 60 sixty
7 seven 17 seventeen 27 twenty-seven 70 seventy
8 eight 18 eighteen 28 twenty-eight 80 eighty
9 nine 19 nineteen 29 twenty-nine 90 ninety
10 ten 20 twenty 30 thirty 100 one hundred
注意
1．基数词1～12需单独记忆。
2．基数词13～19是在个位数词的词干后加-teen 构成，其中thirteen，fifteen，eighteen 变化不规则，先分别记住three，five，eight三个词的末尾变化，再加-teen。
3．基数词20～90的整十数是在2～9的基数词后面加-ty构成，其中twenty，thirty，forty，fifty，eighty 变化不规则。
二、序数词
序数词 数字法 序数词 数字法 巧学妙记 基变序，有规律，末尾加上-th。 一二三，特殊记。 八加h，九去e，f来把ve替。 词尾y变ie，再加-th。 多位数，只变个位就可以。
first 1st eleventh 11th
second 2nd twelfth 12th
third 3rd twentieth 20th
fourth 4th twenty-first 21st
fifth 5th twenty-second 22nd
sixth 6th twenty-third 23rd
seventh 7th twenty-fourth 24th
eighth 8th (one)hundredth 100th
ninth 9th one hundred and first 101st
tenth 10th
知识2 数词的用法 重点
一、基数词的用法
1．表示年份、年代
（1）年份用基数词表达，年份前用介词in。
在1999年 in 1999（读作in nineteen ninety-nine）
在2001年in2001（读作in two thousand and one）
（2）年代用“in the + 整十基数词的复数”表示。
在21世纪20年代 in the 2020s（读作 in the twenty twenties)
2．表示年龄
（1）直接用“基数词（＋years old）”，表示“······岁”。
His grandfather is 80/ eighty ( years old ).
他爷爷80岁了。
（2）at the age of＋基数词。
at the age of four 在四岁的时候
（3）“in one’s＋整十基数词的复数”，表示“在某人几十多岁的时候”。
in his thirties 在他三十多岁的时候
3．表示顺序和编号、电话号码
编号的事物要用基数词表示顺序，但是基数词要后置，通常表达为“名词＋基数词”。
Class 2，Grade 9九年级二班
Page 32第三十二页
Room 105 105房间
Bus No.2 2路公共汽车
Tel：8765469 电话号码：8765469
4．重点 hundred、thousand、million的用法
用法 示例
表示确切的数字：hundred, thousand,million 等词与具体的数字（如 two，three，five等）连用时，不变复数 five/several thousand years 五／几千年 There are two hundred books on the shelf.书架上有两百本书。
表示不确切的数字：hundred, thousand,million 等词的复数形式与of连用时，前面不能再加数字（如two，three，five等） millions of数百万 thousands of 成千上万 hundreds of thousands of 几十万 There are hundreds of books in the room. 房间里有数百本书。
二、序数词的用法
类别 用法 示例
表示顺序 序数词前通常加the，其后接单数名词 the first lesson 第一课 Our classroom is on the second floor of Building 2.我们的教室在2号楼的二楼。
表示日期 日期用“the ＋序数词”表示 National Day is on the 1st of October． 国庆节是10月1日。 May 5五月五日 （读作May the fifth 或 the fifth of May) Mar．1（st）三月一日 （读作 March the first或 the first of March)
表示世纪 世纪可以用“the＋序数词＋century”表示 in the sixth(6th) century 在6世纪 in the eighteenth(18th) century 在18世纪
注意点
1．序数词前有形容词性物主代词或名词所有格限定时，不再加定冠词。例：
Tomorrow will be my brother's ninth birthday.明天将是我弟弟的九岁生日。
2.a/an+序数词，表示“又一，再一”。例：
We'll go over it a second time.我们会再仔细检查一遍。
We've tried it three times. Must we try it a fourth time？我们尝试过三次了，还必须再尝试一次吗？
3．序数词还可以作副词，表示“第几名”。例：Who came first in the race？赛跑谁第一？
4．表示某人第几次做某事，可用结构“It／This is the first/second/... time(that) sb. have done sth.”。例：
This is the first time (that) I've been to London.这是我第一次去伦敦。
三、分数和小数的表达
1．难点 分数的表达法
分子基，分母序；分子大于1，分母变复数。
1/3 one third, 2/3 two thirds,3/5 three fifths
特别记住：1/2 a half, 1/4 a quarter, 3/4 three quarters。
2．小数的表达法
小数点读作point，其左边的整数按基数词的读法，其右边按照数字本身逐个读出。
0.38 zero point three eight
96.89 ninety-six point eight nine
107.509 one hundred and seven point five o/zero nine
数词考点综合练
一、用括号中所给词的适当形式填空。
1．Though the boy has failed twice, we'd better give him a ______（three） chance to show his skills.
[答案]third
2．She is fifteen, and next year she is going to celebrate her ____________（sixteen）birthday.
[答案]sixteenth
3．The old man started to learn how to surf the Internet in his __________（eighty）.
[答案]eighties
4．The students can make up to nine ________（hundred） dollars a day.
[答案]hundred
5．—China is a great country with a history of about five __________ years.
—Yes. And ____________ of foreigners come to visit it every year. （thousand）
[答案]thousand； thousands
6．My grandma told me the number “9” means “long lasting”. So I chose the ______（nine） floor to live on.
[答案]ninth
二.单句填空
1．[2024长沙明德模拟]The ______（one） part refers to eight separate movements. And the second part refers to the stretch（舒展） and beauty of the movements.
[答案]first
[解析]考查序数词。此处表示第一部分指的是八个独立的运动。根据空前的The和下文的And the second part并结合句意可知，填序数词first。
2．[2024衡阳模拟]In fact, the reverse side of the ______（five） series of renminbi banknotes shows the most fascinating landscapes in the country.
[答案]fifth
[解析]考查序数词。句意：事实上，第五套人民币钞票的背面展示了这个国家最迷人的风景。结合所给提示词可知，此处指第五套，故填fifth。
3．[2024山东东营改编]I am the________（two） child in my family. I have an elder brother and a younger sister.
[答案]second
[解析]考查序数词。句意：我是我家的第二个孩子。我有一个哥哥和一个妹妹。由“I have an elder brother and a younger sister.”和空前的the可知，此处填序数词second。
4．[2023怀化改编]People plant __________（hundred） of trees on Tree Planting Day every year.
[答案]hundreds
[解析]考查基数词。句意:人们每年在植树节种数百棵树。hundreds of“数百,几百”,故填hundreds。
5．[2023郴州改编]Dongjiang Lake is a good place to have fun and ____________（thousand） of tourists go camping there in summer.
[答案]thousands
[解析]考查基数词。句意:东江湖是玩乐的好地方,数千名游客夏天去那里露营。thousands of“数千,几千”,故填thousands。
6．[2023张家界改编]The Lantern Festival is a traditional festival in China. It is celebrated on the 15th day of the ______（one） month of the lunar year.
[答案]first
[解析]考查序数词。句意：元宵节是中国的传统节日。农历正月十五庆祝元宵节。根据句意和提示词可知，元宵节是在农历一月，表示第一个，故填first。
7．[2023永州一模]—Have you ever been to Jiuyishan National Forest Park
—Of course. I have been there four times. And I would like to visit it a ______（five） time.
[答案]fifth
[解析]考查序数词。根据上文“我”去过那里四次以及would like to visit it可知，“我”想再参观它一次。“不定冠词+序数词”表示“又一，再一”。故填fifth。
8．[2022长沙一模]The ______（one） modern Olympic Games were held in Athens, Greece, in 1896.
[答案]first
[解析]考查序数词。句意：第一届现代奥林匹克运动会于1896年在希腊雅典举
行。根据空前的The及句意可知，此处要用序数词first。
9．[2022长沙联考]The beach is so famous that __________（million） of tourists put it on their wish lists.
[答案]millions
[解析]考查基数词。此处表示数百万的游客。millions of数百万的。
三.数词填空
A
China is a great country with a history of about 5,000 years. These days 1. （million） of foreigners come to visit it every year. Some of them even marry Chinese girls and live in China. Mr. Smith comes from Germany, and his wife Li Ying is from Hunan. They live in a tall building with 2. （十八） floors in Beijing. Their family lives on the 3. （twelve） floor. They have a daughter and a son. On June 9, the 4. （three） day of gaokao, Li Ying waited for her son outside the school where he was taking his test after work.
[答案]1．millions2．eighteen3．twelfth4．third
[解析]
1．句意:如今，每年都有数百万的外国人前来参观。 当million前面没有具体数字,表示不具体的数目时,需要与of连用,词尾需加-s,millions of 数以百万计的。故填millions。
2．eighteen十八。
3．空前有the,空后是floor,应用序数词twelfth,表示第12层。故填twelfth。
4．空前有the,空后是day,应用序数词third,表示第3天。故填third。
B
Nowadays, many Chinese leave the countryside to search for work in cities. Mrs. Zhang is 5. of them. She hasn’t been home for two years. She is in her 6. （thirty） and she has two sons. She loves them and misses them so much. Last month, she gave her older son a new bicycle for his 7. （nine） birthday. Her 8. （two） son is only eight months old.
[答案]5．one6．thirties7．ninth8．second
[解析]
5．此处表示张女士就是其中一个。one of...表示“……其中之一”,故填one。
6．此处表示她30多岁。“in + one’s+整十基数词的复数形式”表示“在某人几十多岁时”。故填thirties。
7．这里指的是“他的九岁生日”,即“他的第九个生日”,应用序数词。空前有his修饰,所以ninth前不加the。故填ninth。
8．句意:她的第二个儿子才八个月大。应用second表示“第二”。空前有her修饰,故second前不加the。故填second。
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