数词（一）
<p> 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。</p><p> 一、基数词</p><p> 1）基数词写法和读法：</p><p> 345 <span word="three">three</span> <span word="hundred">hundred</span> <span word="and">and</span> <span word="forty">forty</span>-<span word="five">five</span>；</p><p> 2）基数词一般是单数形式，但下列情况，常用复数：</p><p> <span word="a">a</span>. 与<span word="of">of</span> 短语连用，表示概数，不能与具体数目连 用，如<span word="scores">scores</span> <span word="of">of</span> <span word="people">people</span> 指许多人；</p><p> <span word="b">b</span>. 在一些表示一排或一组的词组里；</p><p> 如：<span word="They">They</span> <span word="arrived">arrived</span> <span word="in">in</span> <span word="twos">twos</span> <span word="and">and</span> <span word="threes">threes</span>. 他们三三两两的到达了。</p><p> <span word="c">c</span>. 表示几十岁；</p><p> <span word="d">d</span>. 表示年代，用 <span word="in">in</span> +<span word="the">the</span> +数词复数；</p><p> <span word="e">e</span>. 在乘法运算的一种表示法里，如：3 <span word="x">x</span> 5 = 15 <span word="Three">Three</span> <span word="fives">fives</span> <span word="is">is</span> （<span word="are">are</span>） <span word="fifteen">fifteen</span>.</p><p> </p>
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