中考英语数词讲解教案.docx

中考英语数词讲解教案基数词（一）基本概念：表示数目多少的词叫基数词。1. 1-12独立成词：one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve2. 13-19 (+teen)：thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen3. 20-90 (整十位数+ty)：twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety4. 21-99间的两位数，先说“十位”，再说“个位”，中间要加连字符“-”5. 101-999之间的三位数，先说“百位”，再加and，再加末尾两位数。 6. 1000以上数，使用计数符号，每三位加以逗号，从第一个逗号起单位依次为thousand, million, billion.“万”表达为ten thousand 例：579 five hundred and seventy-nine 802 eight hundred and two 4, 352 four thousand three hundred and fifty-two 14, 615 fourteen thousand six hundred and fifteen 123, 456, 789 one hundred and twenty-three four hundred and fifty-six thousand seven hundred and eighty-nine（二）基数词用法：1. 从句子成分上分析，基数词在句中可用作主语、宾语、表语等。 Four of them went to the factory. （主语） I want two. （宾语） My classmate is eighteen.（表语）2. 编号的事物用基数词。 Today we are going to study Lesson Five. He lives in Room 801. 3. 表示“年、月、日”时年份用基数词，日期用序数词，其顺序由小到大。 The accident took place in 2006. 这次事故发生在2006年。4. 钟点表达法 1. 先点后分，顺读法。如：8：53 eight fifty-three 2. 先分后点，倒读法：前半小时用“分钟数 + past + 已过钟点数”；后半小时用“(60-分钟数) + to + 下一个钟点数”；正好半点用“half past + 已过钟点数”；一刻钟用“quarter”。 7:20 twenty past seven; 6:35 twenty-five to seven; 1:58 two to two; 8:30 half past eight; 9:15 a quarter past nine; 9:45 a quarter to ten.5. 用于加减乘除的数字用基数词。 One plus two is three. Five times six is thirty. 6. 表示百分数用基数词。 Thirty percent of them is water. 7. 表示分数时，分子用基数词，但分母要用序数词；若分子大于1，分母上的序数词要用复数形式。 Two fifths of the book are mine. 8. 表示带有小数的词用基数词。小数点前的整数按基数词的规则表示，小数点写作point，小数点后的数字应按数字直接表示出来。 18.38 可写成 eighteen point three eight.9. 数词 + 名词 (+形容词) 作定语，名词用单数形式。 A twenty-one-year-old girl is behind me. 10. 两组与数词有关的介词短语： (1) in + 定冠词the + 数词 的复数形式，表示年代。 in the 1870s / 1970s (2) in + 物主代词 + 数词 的复数形式，表示某人的年龄。 in ones thirties 在某人三十多岁的时候 有时在物主代词后面可加上形容词early 或late 使含义更确切一些，in his early thirties. 注意：“十几岁”要用in ones teens，不可以说in ones tens。11. 数词前加every，表达“每一段时间或每隔一段” every ten days every four weeks 每10天/每隔9天 每4周/每隔3周 every ninth day every third week （三）基数词考点：1. 基数词表示顺序编号时：名词 + 基数词 ，此时两个词的首字母都要大些。 Class Three Room 5 Lesson One2. 确数与概数的表达。 确数：基数词+单位+复数名词： two hundred students 200名学生 概数：单位加S +of+复数名词：thousands of visitors 成千上万的游客3. “整十加S” 用于表示“几十年代”或“某人几十多岁时” In the 1960s, people had to lead a poor life. 在20世纪60年代，人们不得不过着贫困的生活。 He invented many things in his twenties. 他在20多岁时就发明了很多东西。序数词（一）基本概念：表示顺序先后的数词。序数词大多由基数词变形而成，需掌握了基变序的方法：1. 口诀记忆：基变序，有规律，词尾加上th; 一二三，单独记，词尾分别t，d，d； 八减t，九去e，f来把ve替； ty如果做结尾，直接把y变ie； 若遇几十几，只变个位就可以。 注意：fourfourteenfortyforty-two ninenineteenninetyninety-nine fourthfourteenthfortiethforty-second ninthnineteenthninetiethninety-ninth（二）序数词的用法：1. 序数词主要用作定语、表语，前面要加定冠词the。 The fifth lesson is very easy to learn. You are the first one I believe. （三）序数词的考点：1. 序数词表示顺序时，前要加the，后面接单数名词。 The second picture is very beautiful. The fourth student comes from America.2. 表示日期中的“日”。 2016年9月19日，表示为“September 19th, 2016”; 读作：September the nineteenth, two thousand and sixteen3. 序数词的缩写：1st 2nd 3rd 4th 20th 63rd 78th 4. 序数词表示编号顺序时： Unit One= the first unit Part Two= the second part几种特殊数词（一）普通分数： 子基母序，分子1，分母+S 1/3: one third 2/3: two thirds 1/2:读作 a half或one half 1/4读作 a quarter 或one fourth（二）百分比：基数词 + percent (per cent) 2%读作 two percent 27%读作 twenty-seven percent（三）习惯表达： one and a half apples= one apple and a half 一个半苹果 half an apple半个苹果 one or two apples= one apple or two 一两个苹果 10:30 half past ten 10:25 twentyfive past ten 9:45 fifteen to ten 或 a quarter to ten加减乘除-数字的运算（一）基础知识：=: is/ equals +: plus -:minus *: multiplied by /: divided by 都是介词。 加法：3 plus 9 is/equals 12.减法：9 minus 3 is/equals 6. 乘法：3 multiplied by 9 is/equals27.除法：9 divided by 3 is/equals 3.（二）句型：通常用“加减乘除”的动词原形来开头，构成祈使句，命令做题者。 Add A and B Subtract A from B Multiply A by B Divide A by B If we add 2 to 5, we can get 7. Multiply 2 by 3, please.练习一、单选1.About films were shown during the 5th International Film Festival.A two hundred of B two hundreds of C two hundred D two hundreds2.Well have a holiday. What about going to the West Lake? A two days B two-day C two-days D two-days3.Now children, turn to page and look at picture in Lesson Two.A twentiethone B twentyone C twentieththe first D twentythe first4.During the seven-day May Day holidays, families went sightseeing. A thousand B thousands C thousands and thousands D thousands of 5.During World War ii, a Jewish(犹太的) lady was protected by a local family in Shanghai in her . A fifties B fifty C fiftieth D the fiftieth6.The one-year-old boy is smart and he is able to count up to the _ number. A. hundredB. hundredsC. hundredthD. hundreds of7.He took up learning German in his early _.A. sixtyB. sixtiethC. sixtiesD. the sixties8.People waste _ electricity every day. Its time to take action.A. a large number ofB. huge amounts ofC. many D. quite a lot9. _ study trip in the U.S. has changed my friend a lot in his life style.A. Three yearB. Three yearsC. Three-yearsD. Three years10. _ people took part in the search for the lost baby in Changchun. A. Thousands ofB. two thousandsC. thousand ofD. two thousands of11. The company decided to spend about five _ yuan building a school for the children in western China. A. millionsB. millions ofC. million of D. million12. After _ talk, they decided to buy a new flat with a