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1、数词,数词,数词,数词分基数词和序数词。 基数词表示数目。 序数词表示顺序。,一. 基数词的用法,基数词在句中主要用作主语、宾语、定语、表语、同位语，例如： Thirty of them are Party members.（主语） - How many would you like？ - Three ，please（作宾语） The nine boys are from Tianjin.（定语） Six plus four is ten.（表语） We four will go with you.（同位语）,（2）表示一个具体数字时，hundred, thousand, million不用复
2、数 Our country has a population of 1,300 million people. There are three thousand students in our school. （3）在表示一个不确定数字时则用复数。 After the war, thousands of people became homeless. Maize is the most important food crop for millions of people in the world. They arrived in twos and threes,(4) 表示“十”的数词的复数形
3、式可用来表示人的岁数或年代，例如：He is in his early thirtiesHe died still in his fortiesThis took place in the 1930s,(5) 表示时刻用基数词。We get up at six.The workers begin work at eight.,表示“几点过几分”，用介词past,但须在半小时以内。例如：ten past ten, a quarter past nine,half past twelve表示“几点差几分”用介词to, 但分数须在半小时以上。例如：twenty to nine,five to eig
4、ht,a quarter to ten表示“几点几分”还可直接用基数词。例如：seven fifteen,eleven thirty,nine twenty,序数词的用法,（1）序数词主要用作定语，前面要加定冠词，例如：The first truck is carrying a foot basketsJohn lives on the fifteenth floor,（2）序数词有时前面可加不定冠词来表示“再一”，“又一”这样的意思，例如：Well have to do it a second time Shall I ask him a third time？ When I sat dow
5、n，a fourth man rose to speak,（3）有几个序数词和基数词在拼写时不对应，很容易写错，应特别注意。它们是：one-first, two-second, three-third, five-fifth, eight-eighth, nine-ninth, twelve-twelfth。 （4）表示年，月，日时， 年用基数词表示，日用序数词表示。1960年十月一日读作: October (the) first, nineteen sixty2004年九月十日读作：September (the) tenth, two thousand and four,（5）表示分数时，分
6、子用基数词表示，分母用序数词表示。分子大于1时，分母加-s。例如：three fourths,one second,two fifths,（6）序数词有时用缩写形式：first1st second2ndthird3rd fourth4thtwenty-second22nd,真题训练,1. About _ students in our class can describe that place in English.A. three-fifths B. three-fifth C. third-five D. third-fifths,真题训练,2. Nine _ pounds a week? Thats very good.A. hundred of B. hundreds ofC. hundreds D. hundred,
