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 Its 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,2Its 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,