小升初英语语法大全：数词
<p> 我们学过两类数次：基数词和序数词。</p><p> 基数词用于表示数量多少，而基数词用于表示次序，常在日期中出现。区别：基数词前面没有<span word="the">the</span>序数词前一定要有<span word="the">the</span>。</p><p> 1、超过二十以上的两位数需要在个位和十位之间加上-。如：21 <span word="twenty">twenty</span>-<span word="one">one</span></p><p> 2、三位数以上的则需要在百位数后再加上<span word="and">and</span>。如：101 <span word="a">a</span>/<span word="one">one</span> <span word="hundred">hundred</span> <span word="and">and</span> <span word="one">one</span></p><p> 3、用基数词来修饰可数名词时，一定别忘了它的复数形式。如：十八个男孩 <span word="eighteen">eighteen</span> <span word="boys">boys</span></p><p> 4、用基数词修饰不可数名词时，如是复数，变它的量词为复数。如：两碗米饭 <span word="two">two</span> <span word="bowls">bowls</span> <span word="of">of</span> <span word="rice">rice</span></p><p> 5、序数词一般加<span word="th">th</span>，特殊的有：<span word="first">first</span>, <span word="second">second</span>, <span word="third">third</span>, <span word="fifth">fifth</span>, <span word="eighth">eighth</span>, <span word="ninth">ninth</span>, <span word="twelfth">twelfth</span>以及二十及二十以外的整十：<span word="twentieth">twentieth</span>, <span word="thirtieth">thirtieth</span>, <span word="fortieth">fortieth</span></p><p> 第几十几：前面整十不变，后面几改为序数词。如：88 <span word="eighty">eighty</span>-<span word="eighth">eighth</span></p>
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