Unit 7 How much are these pants

Unit 7 How much are these pants ?数词的用法概念英语的数词可以分为基数词和序数词两种。

基数词表示事物的数量，经常和名词连用或者和表示数量关系的单位名词hundred，thousand，million等连用。

表示事物的具体数目和数量。

2. 英语的基数词的写法可以分类记忆1. 0－12的数词要单独记忆，没有规律，它们分别是：zero, one, two, three ,four ,five , six,seven, eight, nine, ten, eleven, twelve。

2. 13－19都是以个位数＋teen构成的，并且重音都在teen上。

但是13、15，18不是个位数的单词直接加teen，它们有变化。

13 — thirteen，15 — fifteen，18 — eighteen。

其他的是直接加teen。

例如：16 sixteen，17 seventeen。

3. 20、30、40等到90都是个位数＋ty构成的，但是要注意20 twenty，30 thirty，40 forty，50 fifty，80 eighty比较特殊，其他的是个位数的单词直接加ty。

例如：60 sixty，70 seventy。

4. 20以上的两位数的基数词是十位数和个位数之间用连字符号“－”来连接。

例如：33 thirty-three，44 forty-four。

5. 表示百的时候用名词hundred，不论其数目是多少，都用单数形式。

如果是百位数，在百位数和十位数、个位数之间加连词and。

例如：105 one hundred and five；123 one hundred and twenty-three。

注意：表示具体的数量，用数词＋hundred；表示不具体的数量，用hundreds of。

例如：There are two hundred students in our school.我们学校有200名学生。

There are hundreds of boys on the beach today. 今天海滩上有好几百个男孩。

单选1. There are _____ students in my class.A. fourtyB. threetyC. fiftyD. twoty2. There are _____ students in our school.A. two hundredB. two hundredsC. three hundred ofD. three hundreds of3. — Excuse me, how many students are there in your art club?— There are _____.A. twelveB. twelfthC. the twelfthD. fifth4. — How much _____ the red sweater?— _____ eighty yuan.A. is; It’sB. are; They’reC. is; They’reD. are; It’s5. Eleven and twelve is ______.A. TwentyB. twenty-twoC. thirtyD. twenty-three.6. －_______ do you like?－ I like blue.A. How muchB. WhatC. What colorD. How7. －Please give me a red apple.－ OK. _________.A. Here you are.B. Give youC. Yes, thanksD. Take it away8. ______ at the picture please. Can you _____ a cat in the picture?A. Look; seeB. Looks; seeC. See; lookD. See; looks9. There are ______ books on the floor.A. threetyB. thirteenC. threeteenD. third10. －_______ milk do you want?－ Two bottles, please.A. How manyB. How longC. How muchD. How someUnit 8 When is your birthday?序数词的用法一、序数词的构成：1. 序数词是由基数词在词尾加－th构成，表示顺序的数词。

它的前面一般要用定冠词the。

例如：the sixth 第六。

2. 序数词的123是特殊变化，即它们不是在基数词的后面加－th，需要特别记忆和掌握。

第一是first，第二是second，第三是third。

3. 从第四到第十九的序数词都是在基数词的后面加－th，但要注意：第五是fifth，第八是eighth，第九是ninth，第十二是twelfth这几个特殊变化。

4. 整十位的序数词是其相对应的基数词把字母y改为ie再加－th。

例如：twenty－twentieth第二十，forty－fortieth第四十。

5. 从二十一到九十九的序数词，前面的十位数用基数词，后面的个位数用序数词，中间用连字符号连接。

例如：twenty-four－twenty-fourth第二十四。

6. 第一百、第一千、第一百万分别在相对应的基数词的后面直接加－th。

即：hundredth，thousandth，millionth。

二、序数词的用法：1. 序数词的前面一般要用定冠词the表示第几的意思。

例如：You are the second one to know the way. 你是第二个知道方法的人。

2. 表示编号的时候，经常把基数词放在名词的前面表示顺序，相当于the＋序数词＋名词。

例如：lesson five＝the fifth lesson 第五课。

3. 表示分数的时候，分子用基数词，分母用序数词，当分子大于1的时候，分母用复数形式即：在th的后面加字母s。

例如：2/5 two fifths。

4. 序数词在名词的前面经常作定语修饰名词，但是当名词的前面已经有了物主代词的时候，序数词的前面不再用定冠词the。

例如：This is my third question. 这是我的第三个问题。

巩固练习1. Now children, turn to page _______ and look at the _____ picture in Lesson Two.A. twentieth; oneB. twenty; oneC. twentieth; firstD. twenty; first2. There are four people in front of him, so he is the ______ one.A. fiveB. fifthC. firstD. number3. The _____ Sunday in May is Mother’s Day.A. firstB. secondC. oneD. two4. —When is your mother’s birthday?— It’s ________.A. February eighthsB. July thirty-thirdC. February 7thD. March nineth5. The ______ month of a year is April.A. thirdB. forthC. fourthD. fifth6. The girl is _____, today is her _____ birthday.A. twelfth; twelfthB. twelve; twelfthC. twelfth; twelveD. twelve; twelve7. —When is the school trip?—______ March 3rd.A. AtB. OnC. InD. It’s8. —Tom is a middle school student. How old is he?— ______.A. The thirteenB. ThirteenthC. ThirtyD. Thirteen9. There are usually _____ days in February.A. twenty-eightB. twenty-nineC. thirtyD. thirty-one10. Sunday is the _____ day of a week.A. oneB. twoC. firstD. second11.One of _______ is a good nurse.A. meB. my sisterC. my brotherD. my sisters12. My brother is _______ old this year.A. eleven yearB. eleventh yearsC. eleven yearsD. eleventh year13. Are you going to learn ______ second language (语言) in ______ third grade?A. a; theB. a; aC. the; theD. the; a14. Our teacher told us that we would go and visit Beijing _______ May 1st , 2009.A. onB. inC. toD. at15．— ______ is the Olympic Games in Beijing?— ______ 2008.A. How old; InB. When; InC. What; InD. When; on完形填空：A well-dressed man goes l a restaurant a day. He sits down at a table near the window.A waiter comes up to 2 and says, “Can I help you, sir?” The man says, “Can I see the menu?”“Certainly. ”The man wants a good meal. He wants a lot of nice 3 . The waiter gets them for him. The man is having his 4 . At that time a boy comes in and sits down beside the man. He asks the 5 to give him an ice cream. The man does so. Now the boy is eating his ice cream. The man is saying, “I go out 6 a newspaper.”Then he goes out. After the boy eats his ice cream up. The boy 7 and goes to the door. “8 , your father hasn't given the money for the meal and your ice cream. ”The waiter stops him and says.“Father? You're 9 .He isn't my father. I don't 10 him. I meet him in the street. He says he will give me an ice cream if I come here at twelve o'clock. ”（）1. A. in B. out C. into D. onto（）2. A. him B. it C. his D. them（）3. A. dish B. dishes C. plates D. bowls（）4. A. cakes B. drink C. supper D. meal（）5. A. man B. father C. waiter D. boy（）6. A. with B．for C. to D．at（）7. A. sits down B. gets up C. stands up D. comes down（）8. A. Excuse me B．Sorry C. Hello D. Hi（）9. A. good B. right C. well D. wrong（）10. A. like B. know C. help D. ask。