专题四:数词 (共14张PPT).ppt
专题四 数 词,第一讲 基数词,【拓展提示】 ① “数词+单数名词”相当于合成形容词作定语如a fiveyearold boy。合成 形容词不能作表语, 后面必须跟所修饰的名词且该名词一定要用单数形式。 ② “几十”的基数词复数形式可用来表示某人大约几十岁或年代。如 In his thirties, he got great success in business. 在他三十多岁的时候, 他在 生意上取得了很大的成功。 The light was invented in the 1870s. 电灯发明于十九世纪七十年代。,③ 与another, more 连用时, 表示在原有基础上再增加一定数量。如 I need another two hours to finish this project. 再给我两个小时, 我就可以 完成这个项目了。 I want to eat two more cakes. They are very delicious. 我想再吃两块蛋糕, 它们太美味了。,【即时自测】 1How far is the small town from here It s about _____ kilometers. A. one hundred and thirty five B. one hundred and thirtyfifth C. two hundreds and thirty five D. two hundred and thirtyfive,D,2It s never too late to learn. Karl Marx started to learn English in his ______. A. the fiftieth B. fiftieth C. fifty D. fifties 3Students are asked to read a _______ within three minutes and then answer questions wrote on the blackboard. A. 300wordspassage B. 300wordpassage C. 300word passage D. 300words passage,D,C,第二讲 序数词,【拓展提示】 ① 数词表示分数时, 分子用基数词, 分母用序数词; 如果分子大于一, 分 母用复数。如 1/3 onethird; 4/5 fourfifths ② 带分数的词组作句子主语时, 谓语动词的单复数形式取决于分数后的名词。 如 Twofifths of problems are quite easy for most students. 对于大部分学生来 讲, 五分之二的问题都相当简单。,③ 序数词表示顺序时, 前面要用定冠词the。 如 Today, we will study the sixteenth lesson. 今天我们将学习第十六课。 ④ 序数词前用不定冠词时, 表示“又一, 再一”之意。如 He has tried twice, but he wants a third try. 他已经尝试了两次, 但还想再尝 试一次。,【注意】 ※ 序数词前出现人称代词时, 其前不加定冠词the。 定语从句中先行词前有序 数词修饰时, 关系代词只能用that。如 Tomorrow is his twentyseventh birthday. 明天是他的27岁生日。 ※ 基数词hundred, thousand, million, billion表示确切数目时, 无需加s;表示 不确切数目时, 要用“复数形式+of”结构, 意为“成百的;成千上万的”。,※ 表示年月日时, 年份用基数词, 日期用序数词, 表达顺序为“月、日、年” 或“日、月、年”。如 The Tokyo Olympic Games will be held on July 24th, 2020. 东京奥运会将于 2020年7月24日举行。 ※ 时刻的表达方法① 时在前分在后, 按照基数词顺读;② 分在前时在后, 中 间加介词to或past; 当分为15或45时, 第二种表达方法也可用quarter, 当分为 30时, 可用half。如 1015 ten fifteen 或a quarter past ten 845 eight fortyfive 或 a quarter to nine,【即时自测】 4There are _______ seasons in a year, and summer is __________ season of a year. A. four; second B. four; the second C. fourth; the two D. fourth; two 5In his______,Wilson returned to his hometown and wrote many famous novels. A. thirty B. thirties C. thirtieth D. the thirtieth,B,B,6There are forty students in the school union, but about _____ of them are girls. A. a quarter B. one fourths C. onefour D. onefourths 7If you want to live in a more comfortable room, you need to pay for ______ dollars. A. another ten B. more ten C. ten another D. other ten 8When the famous star arrived at the airport, he found that _____ fans were cheering for him. A. hundred B. hundreds C. hundred of D. hundreds of,A,A,D,14-17真题,2014 66. It is a good habit to brush your teeth at least ______ a day. two 2015 36. It’s reported that there are more than 300 smokers in China, nearly a third of all the smokers in the world. A. million B. millions C. million of D. millions of,,2017 70.The ___________ Games of China will be held in Tianjing from August 27. to September 8.thirteen,