Unit2数词2024-2025学年沪教牛津版英语八年级上册

八上Unit2数词 精讲精练 基数词: 表示数目多少的数词 · 一、基数词的构成 构成方法 举例 (1)1-12的基数词是独立的，需牢记 one,two,three,four,five,six,seven,eight,nine,ten, eleven,twelve (2)13-19的基数词以teen结尾 thirteen, fifteen,eighteen 拼写较特殊 (3)20-90的整十数以ty结尾 twenty,thirty,forty,fifty,eighty拼写较特殊 (4)位数与个位数之间要加连字符 53(fifty-three), 76(seventy-six) (5) 101－999, 三位数, 百位与十位/个位之间加and, 十位和个位用“-”连接。 892 (eight hundred and ninety-two) 809 (eight hundred and nine) (6)四位数以上的数要借用科学记数法，从后往前数，每三位数加“,”，第一个逗号为千(thousand)第二个逗号为百万(million)，第三个逗号为十亿(billion)。 e.g. 3,999(three thousand nine hundred and ninety-nine) 4,850_______________________________________ 121,234,560__________________________________ 340,567,456,709_______________________________ 注意： · 1. 英语中没有表示“万”“十万”的单词，要用“几十个千”(thousand)来表示“几万”，“几百个千”来表示“几十万”。 e.g. 10,000(ten thousand), 30万(three hundred thousand) 【例题】 ( B )-Can you write the number eighty-five thousand,six hundred and twenty-six? -Yes, it is. A.85,662 B.85,626 C.58,662 D.58,626 · 2. hundred,thousand,million,billion的特殊用法。 (1)前面有具体数字时，后面都不能加s, 如eight hundred,three thousand。 (2)表示概述时，词尾需加s,后接of,且前面不能有具体数字。 e.g. hundreds/thousands/millions/billions of 例题：1 .Five____hundred______（hundred）students are planting trees. 2. I was born in a small village with only __hundreds_______ (hundred) of people. 3. Every year, ___D__ people go to visit their factory. A. a thousand of B. thousands C. thousand of D. thousands of 4. Last year, I visited a chemical factory in Baise, there are about __B___ workers in it. A. six thousands B. six thousand C. six thousands of D. six thousand of 基数词构成规律口诀 基数词，不难记，找出规律很容易 零至十二形各异，一个一个单独记。 后加-teen 为“十几”thirteen, fifteen 看仔细，eighteen只有一个t. 表示“几十”要加-ty, twenty, thirty是例外， forty, fifty 更厉害，和eighty一样搞例外。 表示数字“几十几”，连着符号要切记。 若要表示“几百几”，and 常把百、十系。 还有一点要注意，几百后别把-s立。 · 二、基数词的用法：表示顺序的数词 (1). 表示数量的多少、号码的大小等。 e.g.There are two playgrounds in our school. 我们学校有两个操场。 —What size do you need? 你要多大号码的？ —Size five. 五号。 例题：There are ___C__ students in my art club, twenty-two girls and eighteen boys. A. Fourteen B. fortieth C. forty (2). 表示年份、年龄。 年 用基数词表示,两位一读,介词用in 日 用序数词表示, 介词用on e.g.1999 nineteen ninety-nine e.g.2008 two thousand and eight e.g.October 1st, 1999 (日用缩写, 月-日-年) e.g.October 1, 1999 (日用数字) e.g.1st October, 1999 日-月-年 表示年龄 My grandma is eighty years old. 我奶奶80岁了。 (3). 表达时刻。 整点 整点时间（基数词）+o'clock 8：00 eight o’clock 特殊读法 15分钟：a quarter 30分钟：a half 顺读法 先时后分, “几点几分” 6:20 six twenty 7:53 seven fifty-three 倒读法 先分后时, 表示“几点过几分”半小时以内: 介词用past 分钟数+past +钟点数 表示“几点差几分” 半小时以上:介词用to , 60减原分钟+ to + (下一个)钟点数 1:01 one past one 1:29 twenty-nine past one 1:31 twenty-nine to two 1:59 one to two 练一练： 3:02 3:15________ 3:30_________ 3:45________ 3:53___________ 4:00________ (4). 小数的用法: point (点) 3.1415926: three point one four one five nine two six (5). 百分数的用法: percent (百分之……) 15％: fifteen percent 120％: one hundred and twenty percent (6). 几十多岁 —- in + one’s + 数词复数 He died in his forties. 四十多岁 (7). 年代 — in + the +整十年份复数 在20世纪30年代: in the 1930s 序数词：表示顺序的数词 · 一、序数词的构成方式 基数词变序数词的规律： 序数词大都是由基数词变化而来的。其构成形式如下： 基数词的形式 变序数词的规则 举例 (1)一般 在基数词后加-th four - fourth (2)以-t结尾 在基数词后加-h eight – eighth (3)以-e结尾 去e再加-th nine – ninth (4)以-ve结尾 改ve为f，再加-th five – fifth (5)以-y结尾的整十数 改y为ie，再加-th twenty – twentieth (6)20以上的两位数 只变个位数 thirty-two-- thirty-second 基数词变序数词口诀：基数变序数，th来帮助。1，2，3，特殊记；8少t，9去e；以y结尾改ie；ve要用f替；five, twelve是两兄弟；遇到几十几，只变个位就可以。 · 注意：序数词在实际书写运用时，常用缩写形式，缩写形式为“阿拉伯数字 + 序数词最后面的两个字母”。 e.g.first – 1st; seventeenth – 17th; twenty-second – 22nd; thirty-third – 33rd 例题：把下列基数词变为序数词： three _________ five __________ eight __________ nine _______ twelve _________ twenty__________ thirty-four_______ forty-one_________ · 二、序数词的用法 1. 表示顺序。序数词表示顺序时，其前需用定冠词the，后面接单数名词。 e.g. February is the second month of the year. 二月是一年中的第二个月。 例题：December is the __C___ month of the year. A. twelve B. twelveth C. twelfth · 注意；当序数词前有形容词性物主代词或名词所有格修饰时，序数词前不用the。 e.g. This is our first lesson this term. 这是我们这一学期的第一节课。 例题：1.Li Ming will be __A___. His parents are going to have a party for his _____ birthday. A. sixteen; sixteenth B. sixteenth; sixteenth C. sixteen;the sixteenth D. sixteenth; sixteen 2.It’s B day of May. Is it Lily’s birthday, too? A.the first; the fifteenth B. the first; fifteenth C. first; the fifteenth D. first; sixteen 2. 表示日期中的“日”。 如：Monday, February 2nd 2022 2022年 2月2号，星期一 · 三、数词的其他常用表达 （1） 分数的表达 用数词表达分数时，分子用基数词，分母用序数词；如果分子大于1，分母用复数。 e.g. Only one fifth of air consists of oxygen. 氧气只占空气的五分之一。 注意：“1/4”常表示为a quarter； “3/4”表示为“three quarters”； “1/2”表示为“a half”。 e.g.I will take three quarters of the tea away. 我要拿走这茶叶的四分之三。 练一练：1/3__one third_______ 2/7___two sevenths_____ 9/10___nine tenths______ 例题：____D___ of the students in Class 6 have lunch at school. A. Two fifth B. One thirds C. Three fifth D. Three quarters （2）加减乘除的表达: “等于”用is, equal等词表示 加 plus,and 2+3=5 Two plus/and three is/equals five. 减 minus,subtract(from) 10-6=4     Ten minus six is/equals four. Subtract six from ten is/equals four. 乘 times/multiply 3×4=12  Three times four is/equals twelve. Multiply three by four, we get twelve. Three multiplied by four is/equals twelve. 除 divide 16÷4=4     Divide sixteen by four,and you will get four. Sixteen divided by four equals/gives/makes four. （3）“基数词+名词” 的合成形容词作定语, 中间有连字符“-”, 当中的名词用单数。 a 3-year-old girl a seven-day holiday A twenty-one-year-old girl is behind me. 一位二十一岁的女孩在我身后。 例题：Tom has just finished writing a _____C____ article. A. nine-hundred-words B. nine-hundreds-word C. nine-hundred-word D. nine-hundreds-words 【针对练习】 题型1： 单项选择 ( C )1. I’d like bowls of rice. One is for myself and the other two are for my parents. A. one B. two C. three D. four ( D )2. I got a new bike on birthday. I like it very much. A. fifteenth B. fifteen C. my fifteen D. my fifteenth ( B )3. Gina’s birthday is the first day of June. A. in B.on C. at D. for ( D )4. Unit ______ is easy but ______ unit is difficult.     A. Sixth; seven   B. Six; seven   C. Sixth; the seventh  D. Six; the seventh   ( C )5. people will visit Qinzhou during the 12th Games of Guangxi. A. Thousand B. Two thousands C. Thousands of D. Thousand of ( B )6. Now, everybody, please turn to Page ______and look at the _______picture . A. Fifth; five B. Five; fifth C. Fifth; fifth D. Five; five ( B )7. After the Asian Games, ______ people came to Guangzhou for a visit during holidays. A. thousand B. thousands of C. five thousands D. five thousands of 题型2：选择正确的单词或者短语填空。 1. About ______ (four fifths; four fifth) of the books in our school library ______ (is; are) written in Chinese. 2. At the age of ______ (thirty; thirtieth), he had his own lab. 3. ______ (Two sons their; Their two sons) are in the army. 4. ______ (Two fifth; Two fifths) of the land in that district _______ (is; are) covered with trees and grass. 5. Tom was ______ (first; the first) to get to school and I was______ (ninth; the ninth). 题型3：单项选择。 ( C )1．About of students reading English stories in our class． A．one fifth；likes B．one five； like C．one fifth；like D．one five；likes ( B )2．About of the earth covered with water， but we have less and less fresh water． A．three﹣fourth；are B．three﹣fourths；is C．three﹣fourth；is D．three﹣fourths；are ( C )3．About ________ of the earth is covered with water， but more and more water has been polluted． A．three forth B．three forths C．three fourth D．three fourths ( B )4.My father joined the army in _____ when he was in ________． A．1960s； twenties B．the 1960s； his twentieth C．1960； his twenties D．1960s； the twenties ( D )5._______，when Marx was already _______，he found it was important to study the situation in Russia，so he began to learn Russian． A．In 1870s,in his fifties B．In 1870s,in fifties C．In the 1870s,in fifties D．In the 1870s,in his fifties ( D )6. His father began to work in this factory in _______ when he was in _______． A．the 1970s, the twenties B．1950s, his twenties C．1950s,twenties D．the 1950s,his twenties ( C )7. Last Sunday was Andy's birthday．We had a birthday party． A．twelve B．the twelfth C．twelfth D．the twelve ( D )8. On February 25, 2013, Li An, a Chinese director, won the best director again.  It is his           time to win an ―Oscar.  A.first  B. three   C. twice     D. second 权属 所有，未经书面同意，不得复制发布 题型4：用所给词的适当形式填空 1.(2023·眉山中考改编)—Tim,how often do you visit your grandparents? —__Once__________(one)a week.I really enjoy staying with them. 2.(2023·白银、临夏州中考)Our home is the ______third______(three)from the end on the left. 3.(2023·龙东中考) Harbin is a beautiful city.So _____millions_______(million)of people come here to enjoy snow every winter. 4.(2022·泰安中考改编)There are 5 people waiting for the bus in front of me.I am the __sixth__________ (six) one. 5.(2022·盘锦中考)Look at the photo!The _____ninth_______ (nine) boy from the right is my best friend. 6.（2023·甘肃定西三模）It’s wonderful to live on the_____twelfth_______(twelve) floor. You can see the whole town. 7.（2023·上海杨浦三模）The____eighth________（eight）person from the right in the photo is my cousin, Linda. 8.（2023·云南昆明二模）China celebrated the_____thirteenth_______(thirteen) China Tourism Day on May 19th in Tengchong, Yunnan Province. 9.（2023·上海浦东新二模）Doctor Wang keeps running marathons even though he’s in his___sixties_________(sixty). 10.（2023·上海虹口二模）It is the_____second_______(two) time that my cousin and I have been to Beijing. 第 1 页 共 8 页 学科网（北京）股份有限公司 学科网（北京）股份有限公司 $$ 八上Unit2数词 精讲精练 基数词: 表示数目多少的数词 · 一、基数词的构成 构成方法 举例 (1)1-12的基数词是独立的，需牢记 one,two,three,four,five,six,seven,eight,nine,ten, eleven,twelve (2)13-19的基数词以teen结尾 thirteen, fifteen,eighteen 拼写较特殊 (3)20-90的整十数以ty结尾 twenty,thirty,forty,fifty,eighty拼写较特殊 (4)位数与个位数之间要加连字符 53(fifty-three), 76(seventy-six) (5) 101－999, 三位数, 百位与十位/个位之间加and, 十位和个位用“-”连接。 892 (eight hundred and ninety-two) 809 (eight hundred and nine) (6)四位数以上的数要借用科学记数法，从后往前数，每三位数加“,”，第一个逗号为千(thousand)第二个逗号为百万(million)，第三个逗号为十亿(billion)。 e.g. 3,999(three thousand nine hundred and ninety-nine) 4,850_______________________________________ 121,234,560__________________________________ 340,567,456,709_______________________________ 注意： · 1. 英语中没有表示“万”“十万”的单词，要用“几十个千”(thousand)来表示“几万”，“几百个千”来表示“几十万”。 e.g. 10,000(ten thousand), 30万(three hundred thousand) 例题】 ( )-Can you write the number eighty-five thousand,six hundred and twenty-six? -Yes, it is. A.85,662 B.85,626 C.58,662 D.58,626 · 2. hundred,thousand,million,billion的特殊用法。 (1)前面有具体数字时，后面都不能加s, 如eight hundred,three thousand。 (2)表示概述时，词尾需加s,后接of,且前面不能有具体数字。 e.g. hundreds/thousands/millions/billions of 例题：1 .Five__________（hundred）students are planting trees. 2. I was born in a small village with only _________ (hundred) of people. 3. Every year, _____ people go to visit their factory. A. a thousand of B. thousands C. thousand of D. thousands of 4. Last year, I visited a chemical factory in Baise, there are about _____ workers in it. A. six thousands B. six thousand C. six thousands of D. six thousand of 基数词构成规律口诀 基数词，不难记，找出规律很容易 零至十二形各异，一个一个单独记。 后加-teen 为“十几”thirteen, fifteen 看仔细，eighteen只有一个t. 表示“几十”要加-ty, twenty, thirty是例外， forty, fifty 更厉害，和eighty一样搞例外。 表示数字“几十几”，连着符号要切记。 若要表示“几百几”，and 常把百、十系。 还有一点要注意，几百后别把-s立。 · 二、基数词的用法：表示顺序的数词 (1). 表示数量的多少、号码的大小等。 e.g.There are two playgrounds in our school. 我们学校有两个操场。 —What size do you need? 你要多大号码的？ —Size five. 五号。 例题：There are _____ students in my art club, twenty-two girls and eighteen boys. A. Fourteen B. fortieth C. forty (2). 表示年份、年龄。 年 用基数词表示,两位一读,介词用in 日 用序数词表示, 介词用on e.g.1999 nineteen ninety-nine e.g.2008 two thousand and eight e.g.October 1st, 1999 (日用缩写, 月-日-年) e.g.October 1, 1999 (日用数字) e.g.1st October, 1999 日-月-年 表示年龄 My grandma is eighty years old. 我奶奶80岁了。 (3). 表达时刻。 整点 整点时间（基数词）+o'clock 8：00 eight o’clock 特殊读法 15分钟：a quarter 30分钟：a half 顺读法 先时后分, “几点几分” 6:20 six twenty 7:53 seven fifty-three 倒读法 先分后时, 表示“几点过几分”半小时以内: 介词用past 分钟数+past +钟点数 表示“几点差几分” 半小时以上:介词用to , 60减原分钟+ to + (下一个)钟点数 1:01 one past one 1:29 twenty-nine past one 1:31 twenty-nine to two 1:59 one to two 练一练： 3:02 3:15________ 3:30_________ 3:45________ 3:53___________ 4:00________ (4). 小数的用法: point (点) 3.1415926: three point one four one five nine two six (5). 百分数的用法: percent (百分之……) 15％: fifteen percent 120％: one hundred and twenty percent (6). 几十多岁 —- in + one’s + 数词复数 He died in his forties. 四十多岁 (7). 年代 — in + the +整十年份复数 在20世纪30年代: in the 1930s 序数词：表示顺序的数词 · 一、序数词的构成方式 基数词变序数词的规律： 序数词大都是由基数词变化而来的。其构成形式如下： 基数词的形式 变序数词的规则 举例 (1)一般 在基数词后加-th four - fourth (2)以-t结尾 在基数词后加-h eight – eighth (3)以-e结尾 去e再加-th nine – ninth (4)以-ve结尾 改ve为f，再加-th five – fifth (5)以-y结尾的整十数 改y为ie，再加-th twenty – twentieth (6)20以上的两位数 只变个位数 thirty-two-- thirty-second 基数词变序数词口诀：基数变序数，th来帮助。1，2，3，特殊记；8少t，9去e；以y结尾改ie；ve要用f替；five, twelve是两兄弟；遇到几十几，只变个位就可以。 · 注意：序数词在实际书写运用时，常用缩写形式，缩写形式为“阿拉伯数字 + 序数词最后面的两个字母”。 e.g.first – 1st; seventeenth – 17th; twenty-second – 22nd; thirty-third – 33rd 例题：把下列基数词变为序数词： three _________ five __________ eight __________ nine _______ twelve _________ twenty__________ thirty-four_______ forty-one_________ · 二、序数词的用法 1. 表示顺序。序数词表示顺序时，其前需用定冠词the，后面接单数名词。 e.g. February is the second month of the year. 二月是一年中的第二个月。 例题：December is the _____ month of the year. A. twelve B. twelveth C. twelfth · 注意；当序数词前有形容词性物主代词或名词所有格修饰时，序数词前不用the。 e.g. This is our first lesson this term. 这是我们这一学期的第一节课。 例题：1.Li Ming will be _____. His parents are going to have a party for his _____ birthday. A. sixteen; sixteenth B. sixteenth; sixteenth C. sixteen;the sixteenth D. sixteenth; sixteen 2.It’s day of May. Is it Lily’s birthday, too? A.the first; the fifteenth B. the first; fifteenth C. first; the fifteenth D. first; sixteen 2. 表示日期中的“日”。 如：Monday, February 2nd 2022 2022年 2月2号，星期一 · 三、数词的其他常用表达 （1） 分数的表达 用数词表达分数时，分子用基数词，分母用序数词；如果分子大于1，分母用复数。 e.g. Only one fifth of air consists of oxygen. 氧气只占空气的五分之一。 注意：“1/4”常表示为a quarter； “3/4”表示为“three quarters”； “1/2”表示为“a half”。 e.g.I will take three quarters of the tea away. 我要拿走这茶叶的四分之三。 练一练：1/3_________ 2/7________ 9/10_________ 例题：_______ of the students in Class 6 have lunch at school. A. Two fifth B. One thirds C. Three fifth D. Three quarters （2）加减乘除的表达: “等于”用is, equal等词表示 加 plus,and 2+3=5 Two plus/and three is/equals five. 减 minus,subtract(from) 10-6=4     Ten minus six is/equals four. Subtract six from ten is/equals four. 乘 times/multiply 3×4=12  Three times four is/equals twelve. Multiply three by four, we get twelve. Three multiplied by four is/equals twelve. 除 divide 16÷4=4     Divide sixteen by four,and you will get four. Sixteen divided by four equals/gives/makes four. （3）“基数词+名词” 的合成形容词作定语, 中间有连字符“-”, 当中的名词用单数。 a 3-year-old girl a seven-day holiday A twenty-one-year-old girl is behind me. 一位二十一岁的女孩在我身后。 例题：Tom has just finished writing a _________ article. A. nine-hundred-words B. nine-hundreds-word C. nine-hundred-word D. nine-hundreds-words 【针对练习】 题型1： 单项选择 ( )1. I’d like bowls of rice. One is for myself and the other two are for my parents. A. one B. two C. three D. four ( )2. I got a new bike on birthday. I like it very much. A. fifteenth B. fifteen C. my fifteen D. my fifteenth ( )3. Gina’s birthday is the first day of June. A. in B.on C. at D. for ( )4. Unit ______ is easy but ______ unit is difficult.     A. Sixth; seven   B. Six; seven   C. Sixth; the seventh  D. Six; the seventh   ( )5. people will visit Qinzhou during the 12th Games of Guangxi. A. Thousand B. Two thousands C. Thousands of D. Thousand of ( )6. Now, everybody, please turn to Page ______and look at the _______picture . A. Fifth; five B. Five; fifth C. Fifth; fifth D. Five; five ( )7. After the Asian Games, ______ people came to Guangzhou for a visit during holidays. A. thousand B. thousands of C. five thousands D. five thousands of 题型2：选择正确的单词或者短语填空。 1. About ______ (four fifths; four fifth) of the books in our school library ______ (is; are) written in Chinese. 2. At the age of ______ (thirty; thirtieth), he had his own lab. 3. ______ (Two sons their; Their two sons) are in the army. 4. ______ (Two fifth; Two fifths) of the land in that district _______ (is; are) covered with trees and grass. 5. Tom was ______ (first; the first) to get to school and I was______ (ninth; the ninth). 题型3：单项选择。 ( )1．About of students reading English stories in our class． A．one fifth；likes B．one five； like C．one fifth；like D．one five；likes ( )2．About of the earth covered with water， but we have less and less fresh water． A．three﹣fourth；are B．three﹣fourths；is C．three﹣fourth；is D．three﹣fourths；are ( )3．About ________ of the earth is covered with water， but more and more water has been polluted． A．three forth B．three forths C．three fourth D．three fourths ( )4.My father joined the army in _____ when he was in ________． A．1960s； twenties B．the 1960s； his twentieth C．1960； his twenties D．1960s； the twenties ( )5._______，when Marx was already _______，he found it was important to study the situation in Russia，so he began to learn Russian． A．In 1870s,in his fifties B．In 1870s,in fifties C．In the 1870s,in fifties D．In the 1870s,in his fifties ( )6. His father began to work in this factory in _______ when he was in _______． A．the 1970s, the twenties B．1950s, his twenties C．1950s,twenties D．the 1950s,his twenties ( )7. Last Sunday was Andy's birthday．We had a birthday party． A．twelve B．the twelfth C．twelfth D．the twelve ( )8. On February 25, 2013, Li An, a Chinese director, won the best director again.  It is his           time to win an ―Oscar.  A.first  B. three   C. twice     D. second 权属 所有，未经书面同意，不得复制发布 题型4：用所给词的适当形式填空 1.(2023·眉山中考改编)—Tim,how often do you visit your grandparents? —____________(one)a week.I really enjoy staying with them. 2.(2023·白银、临夏州中考)Our home is the ____________(three)from the end on the left. 3.(2023·龙东中考) Harbin is a beautiful city.So ____________(million)of people come here to enjoy snow every winter. 4.(2022·泰安中考改编)There are 5 people waiting for the bus in front of me.I am the ____________ (six) one. 5.(2022·盘锦中考)Look at the photo!The ____________ (nine) boy from the right is my best friend. 6.（2023·甘肃定西三模）It’s wonderful to live on the____________(twelve) floor. You can see the whole town. 7.（2023·上海杨浦三模）The____________（eight）person from the right in the photo is my cousin, Linda. 8.（2023·云南昆明二模）China celebrated the____________(thirteen) China Tourism Day on May 19th in Tengchong, Yunnan Province. 9.（2023·上海浦东新二模）Doctor Wang keeps running marathons even though he’s in his____________(sixty). 10.（2023·上海虹口二模）It is the____________(two) time that my cousin and I have been to Beijing. 第 1 页 共 8 页 学科网（北京）股份有限公司 学科网（北京）股份有限公司 $$