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一、知识点总结 数词分为基数词和序数词两种; (一)基数词在英语中表示数目的词称为基数词。 1.基数词的构成 (1)1-20：one,two,three,four,five,six,seven,eight,nine,ten, eleven,twelve,thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen,twenty (2)21-99 先说几十，再说几，中间加连字符。 23twenty-three,34thirty-four, (3)101999先说几百，再加and,再加末两位数或末位数; 586five hundred and eighty-six,803eight hundred and three (4)l,000以上,先从右往左数，每三位数加一个,,第一个,前为thousand.第二个,前为million,第三个,前为billion,然后一节一节地表示。 9,785nine thousand, seven hundred and eighty-five 6,260,309six million two hundred and sixty thousand three hundred and nine 750,000,000,000seven hundred and fifty, billion 2.基数词的用法 (1)表示数量 Eg. 一 How many books would you like? 一I would like two. (2)表示号码 eg.My phone number is 6887789. (3)表示时间 | 
