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：inthe1980s/’sinhistwenties在他二十多岁时日期:12月1日Dec.1st1976nineteenseventy-six数+单位+复数名词“几个…”,several/few可替数规则1)+th2)ve→fth3)ty→tieth4)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“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/sb’s+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→aquarterpastfive8:30→halfpasteight编号Room105;PageFive;Lesson12=thetwelfthlesson“半”半小时→halfanhour1.5小时→oneandahalfhours或onehourandahalf年龄用基数词生日用序数词anumberof+复数“许多”作主语被视为复数thenumberof+复数“的数量”作主语被视为单数小数：5.7→fivepointseven百分数：percent不加s合成形容词数字+单数名词“…的”an8-year-oldboy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
