1、考点三数词一、基数词表达在某人几十多岁时用in ones整十基数词的复数（十除外）表达在几十年代时用in the整十基数词的复数hundred，thousand与million等前有数词或several时不能用复数形式，且其后不加of表示不确切的数目时应用hundreds/thousands/millions of复数名词Bill Clinton was the US president in the nineties（ninety）.二、序数词1.基数词变序数词的规律一般由基数词加-th构成sixth， seventh， tenth， eleventh， hundredth等以-ty结尾的基
2、数词，先把-y变为-i，再加-ethtwentieth， thirtieth等不规则变形first， second， third， fifth， eighth， ninth， twelfth等2.序数词的基本用法序数词前一般要加定冠词the或形容词性物主代词等限定词。序数词前也可加不定冠词，表示又一，再一。2021新高考，56In the seventh（seven） grade， I started volunteering at the Monterey Bay Aquarium in California.1.Guan Yu，general of the second and the t
3、hird（three） century AD，was an iconic figure in Chinese history，well-known for his bravery and loyalty.2.The book is very interesting； I want to read it a second（two） time.3.There I met a gentleman by the name of Kurien in his late eighties（eighty）.4.It is reported that the floods have left thousands（thousand） of people homeless.
