1、数词基数序数用法常用：个十位间连字符百十位间and单位hundred、 thousand、 million、billion年代：in the 1980s/s in his twenties在他二十多岁时日期:12月1日 Dec.1st 1976 nineteen seventy-six数+单位+复数名词“几个”,several/few可替数规则1) +th 2)vefth3)tytieth4)不规则常考first,second,third,fifth,eighth,ninth,twelfth,twentieth,twenty-first,fortieth序数词前加the表“第几”加a/an表“
2、再一、又一” 数+more=another+数“又几再几”单位s+of+复数名词 “很多”，前可加many数+单位+of+the/sbs+复数/宾格“中的几个”分数：分子用基数词，分母用序数词，先分子后分母，分子大于一，分母用复数时刻5:15 a quarter past five 8:30 half past eight编号Room 105; Page Five; Lesson 12=the twelfth lesson“半” 半小时half an hour1.5小时one and a half hours或one hour and a half年龄用基数词生日用序数词a number of +复数“许多”作主语被视为复数the number of+复数 “的数量”作主语被视为单数小数：5.7 five point seven 百分数：percent不加s合成形容词数字+单数名词 “的” an 8-year-old boy时间、距离、金钱作主语，无论多少，一律被视为单数数字大于一，其后定加复其后是单数，则定是序数数词中考点基数之意序数之形听力选择、填空阅读计算2012年81. Jack got the _ (four) place in the 100-meter race.3
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