初升高衔接 数 词表示数目多少或顺序多少的词叫数词，数词分为基数词和序数词。表示数目多少的数词叫基数词；表示顺序的数词叫序数词。一、基数词1.基数词写法和读法： 345three hundred and forty-five；2.基数词一般是单数形式，但下列情况，常用复数：1.)表示一个具体数字时，hundred, thousand, million一律不用复数；在表示一个不确定数字时则用复数。例如：Our country has a population of 1,300 million people.There are three thousand students in our school.2.)表示几十岁；in his forties He is in his early thirties He died still in his forties3.)表示年代，用 in +the +数词复数；in the 1980s / 1980s This took place in the19
