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高考英语语法突破四大篇：专题4 数词框架结构图基数词的构成及作用1.常用基数词表ⅠⅡⅢone eleven thirtytwo twelve fortythree thirteen fiftyfour fourteen sixtyfive fifteen seventysix sixteen eightyseven seventeen ninetyeight eighteen hundrednine nineteen thousandten twenty million/billion2.基数词构成歌诀1至12逐个记，13至19 teen结尾。
20至90整十位，ty结尾是后缀。
要是表示“几十几”，连字符十位连个位。
若要表示“几百几”，hundred之后and立。
若要用于复合形容词，连字符相连不加-s。
注意：(1)hundred，thousand，million，billion等词前有基数词或several时，须用单数；与of连用时，用复数，但其前面不能再加数词。
如：six hundred people hundreds of people(2)dozen前有具体数词修饰时，用单数，of可省略；当dozen后面接these，those，them，us等词时，须先接of，再接这些词，但dozen仍不加-s；dozens of中的of不可省。
score 用法和dozen相当，但of一般不省略。
several dozen pencils dozens of studentsthree dozen of these eggs two dozen of themtwo score of eggs scores of books3.基数词的位置常位于another，all之后，such，more之前，可置于last，next，other之前或之后。
another two days all the ten booksone more apple two such penshis last two days/his two last days4.基数词的句法功能(1)主语Three will be enough.(2)宾语The city has a population of three million.(3)表语The population of this city is nearly two million.(4)同位语They two went to the cinema.(5)定语The river is about eight miles long.序数词的构成及作用1.常用序数词表ⅠⅡⅢfirst eleventh thirtiethsecond twelfth fortieththird thirteenth fiftiethfourth fourteenth sixtiethfifth fifteenth seventiethsixth sixteenth eightieth seventh seventeenth ninetieth eighth eighteenth hundredth ninth nineteenth thousandthtenth twentieth millionth/billionth注意：21以上的多位数词，只将末位数变为序数词，前面的其他位数仍用基数词。
