1、1教学设计一、教学目标1.掌握基数词的构成及其用法。2.掌握序数词的构成及其用法。3.了解其他数词的用法。 二、教学重难点1.基数词 2.序数词三、教学方法问题探究法四、教学过程Step1:独学1、如何读大数? 比如 765,987,364,237 87,546,364,321 843,657,8052、单位词的用法? 3、如何表示“在某人几十岁的时候” 4、如何表示年代 ? 5、如何表示时间? 6、基数词如何变序数词? 7、冠词与序数词的连用? 8、编号如房间号等表示法? 9、年月日的表示法及读法? 10、分数表示法及主谓一致? 11、百分数的表示法? 12、数学公式表示法? Step2:对
2、学、群学一、基数词探究一:基数词的读法把下面的口诀补充完整,总结较大数字的读写方法。 【 口诀】 数字读写 so easy,从右至左去分位。三位一体加逗号,thousand、million、billion 读出来。千百位间_用,百十位间用“_”中。十个位间_,空位用“_” 应记清。如:1,234,007 读作 one million, two hundred and thirty-four thousand and seveneg: 5,991,892,725 five billion, nine hundred and ninety-one million, eight hundred an
3、d ninety-two thousand, seven hundred and twenty-five. 80,563,371,461 探究二:单位词的用法hundred,thousand,million ,billion 等用在具体的数字后面时不能加 或 ;hundred,thousand,million ,billion 等前面没有具体的数字时通常加 或 。eg: eight thousand people 八千人 thousands of people 成千上万的人 巧记: 模糊数字俩有 (有 of 有 s)2具体数字俩无 (无 of 无 s)探究三:in + ones + “整十”的
4、基数词复数,表示“在某人几十岁时”。He invented many things in his .他在他二十几岁时他发明了很多东西。探究四:表示年代时,在年份的阿拉伯数字后面加s 或s。eg: in the 1990s= in the 1990s 在二十世纪九十年代 探究五:时间的表达方式1、“整点”时,可用“基数词+oclock”,oclock 也可省略 eg: 9:00 (oclock) 。2、“非整点法 ”1)顺读法:即“ 先时后分 ”,直接用基数词读出。 eg:4:10 four ten 9:50 _2)逆读法:即“ 先分后时” 分钟小于或等于 30 时,用“分钟数+past +钟点
5、数”形式。 eg:7: 20 twenty past seven 8:05 _当分钟数=30 时,可用 half 代替 thirty. eg:10:30 thirty / half past ten 8:30_当分钟数=15 时,可用 fifteen 表达,也可用 a quarter 表达。eg:6:15 a quarter past six = _ 分钟大于 30 分钟时,用“ (60-分钟数 + to + (钟点数+1)” 形式。eg:7:50 ten to eight 10:45 _ = _【中考真题再现】( ) Its 11:45. Yes, its _. (漳州市)A . fifte
6、en past twelve B. fifteen from twelve C. a quarter past twelve D. a quarter to twelve探究六: “数字连词符 +单数名词”或“数字连词符+单数名词连词符+ 形容词”构成复合形式作定语。She is an chinese girl.她是一个十八岁的中国女孩。We have a holiday in October.在十月我们有一个七天的假期。注意:a ten-minute walk = ten minutes walk 步行 10分钟的路程探究七:“基数词 more”或“another基数词” 表示 “在原来的基
7、础上增加的数量”。eg: I need 10 more days= I need days. 我需要另外的十天。探究八:基数词习惯用法 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 一俩个苹果二、序数词探究九 基数词变序数词完成下面的口诀,掌握基数词改为序数词的方法。 基变序,有规律,词尾要加 th . 3一二三,特殊记,-th,从 4起;见到 ve变 f,然后再加-th; 8去 ,9去 ,然后再加-th; ty变作 tie,然后再加
8、 th; 若遇几十几,只变个位就可以. 你能写出:第一 ,第二 第三 第五 第八 第九 第十二 第二十 这几个序数词吗?探究十: 冠词与序数词1. The + 序数词 表示 the first lesson2. a/an +序数词 表示 She is going to try a third time.她准备再试一次( 第三次? )。探究十一 :年、月、日的表达 two B. Second; two C. Two; second D. Second; second( )2. Today we are going to learn _. Thats nice, Mr. Wang. 4A. Les
9、son Second B. the Lesson Two C. Lesson Two D. second lesson 探究十三:分数的表达方式1) 分子用_,分母用_(子基母序),分子大于 1,分母用_数。eg: 1/3 one third 6/9 _ _注意: 12 用 a / one half ( = one second ) ,14 用 a quarter (= one fourth ) eg: 3/4 _ = _2) 分数作主语时,谓语动词跟 of 后的名词单复数一致。eg: 1) Two thirds of the students _ (be) boys in Class 2)
10、Half of her money _ (be) spent on clothes last month.【中考真题再现】( ) _ of the land in that district _ covered with trees and grass. (常州)A. Two fifths; is B. Two fifth; are C. Two fifth; is D. Two fifths; are拓展:小数表达法5.79 five point seven nine4.78 百分数表达法16% sixteen percent18% 探究十四:其它重要表达方式的考法1、数学符号表达法一些数学
11、公式的读法:“加”用 plus/and, “减”用 minus, “乘”用 times, “除”用divided by,动词多用单数,如:358 读作:Three plus/and five is eight.927 读作:Nine minus two is seven.6530 读作:Five times six is thirty.842 读作:Eight divided by four is two.2、时间、距离、金钱数字名词做主语时谓语动词用单数 。 eg: Ten days is enough for the job. 【中考真题再现】( ) _ twenty minutes en
12、ough for you to finish the work? (巴中)A. Are B. Is C. Have D. HasStep3: 组内小展示 班内大展示1. The government of Linyi is building _ cheap and good houses for the people. A. thousand B. thousands C. thousand of D. thousands of2. Did you know that the Garth is home to _ animals? A. million B. millions C. milli
13、on of D. millions of3. October is the _ (ten) month of the year. 4. Tom has just finished writing a _ article.A. nine-hundred-words B. nine-hundreds-wordC. nine-hundred-word D. nine-hundreds-words5. I dont believe that this _ boy can paint such a nice picture.A. five years old B. five-years-old C. f
14、ive-year-old6. The action film has attracted millions of young people to the cinema.A. 130-minute B. 130-minutes C. 130 minute D.130 minutes57. The number of the students in our school is about nine _. _ of them are boys.A. hundred; Two thirds B. hundred; Two third C. hundreds; Two thirds D. hundred
15、s; Two third8. About _of the students in Grade Nine this year were born in the_.A. three five; 1996. B. three fifths; 1990s C. third fifth; 1997. D. third fifths; 1990s9. May is the _ month of a year.A. fifty B. fifteen C. fifth D. five10. Please turn to page _ and look at the _picture in this unit.
16、A. twentieth; one B. twenty; one C. twentieth; first D. twenty; first11.Would you like to have _ apples? No, thank you. Ive had enough. A. other two B. another two C. more two D. two others 12. In order to finish the project, well have to work _ hours a day.A. more two B. two more C. two another13.
17、its said that _ of the water around the world _ polluted.A. two third; has B. two thirds; have C. two third; are D. two thirds; is14. Lindas mother looks young, but actually is in her _.A. sixties B. sixtieth C. sixty years old15. December is _ month of the year.A. twelve B. the twelfth C. the twelv
18、eth16“Food Safety” has become one of the hottest topics recently.Yeah, it receives _ Internet hits(点击) a day.A. thousands B. thousand of C. thousands of D. ten thousands17. The winner of the singing competition was a _ girl called Zhang Mei from China.A. 19-years-ol d B.19-year-old C. 19-year-olds.1
19、8. The earthquake in Yaan left _ people homeless. A. two thousand B. thousands of C. two thousands of D. two thousand of19. doctors are against H7N9 in China. A. Thousands B. A thousand of C. Thousands of20. Lincoln was born on _.A. February 12, 1809 B. 1809, February 12 C. 1809, 12 February D. Febr
20、uary 1809, 1221. A _ boy can sing the English song very well.A. ten-year-old B. ten years old C. ten-year-old D. fifth years old22. The number 4,123 is read _.A. four thousand one hundred and twenty-three B. four thousand and one hundred twenty-threeC. four thousand and a hundred and twenty-three D.
21、 four thousands a hundred and twenty-three 23. The old professor still works hard though he is _.A. in his sixty B. in his sixties C. in sixties D. in the sixty24. How many new words are there in _ lesson? There are only _.A. five; fifth B. fifth; five C. the fifth; the five D. the fifth; five25. Youve done it twice. Why not try _ time? A. third B. the third C. a third D. once626. Which is the _ month? Its September.A. nine B. nineth C. ninth D. ninety