牛津7B Unit 1导学案2_初中英语课文_初中英语-查字典英语网

　　1. 基数词的读法：

　　⑴几十几十位和个位之间用。e.g. 32 thirty-two

　　⑵101999 百位和十位间加and.e.g. 928 nine hundred and twenty-eight

　　⑶1000 以上的数，从后往前每三位一段，倒数第一个数读thousand，倒数第二个数读million，依次类推。e.g. 8,542,601 eight million, five hundred and forty-three thousand, six hundred and one

　　2. 基数词的运用：

　　hundred, thousand, million, billion等一般用单数，但以下情况用复数：

　　⑴表示不定数目：e.g. hundreds of millions of

　　⑵表示几十的数词，其复数形式可以表示年龄或年代。

　　e.g. in his twenties in the thirties

　　0zero10ten20twenty100

　　1one11eleven30thirtyone hundred

　　2two12twelve40forty1,000

　　3three13thirteen50fiftyone thousand

　　4four14fourteen60sixty10,000

　　5five15fifteen70seventyten thousand

　　6six16sixteen80eighty100,000

　　7seven17seventeen90ninetyone hundred thousand

　　8eight18eighteen1,000,000

　　9nine19nineteenone million

　　3. Ordinal numbers

　　We can use ordinal numbers to to order things and events. We use them to talk about dates, floors, results, etc.

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