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ⅠⅡⅢoneeleventhirtytwotwelvefortythreethirteenfiftyfour fourteensixtyfivefifteenseventysixsixteeneightysevenseventeenninetyeighteighteenhundredninenineteenthousandtentwentymillion/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。1several 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ⅠⅡⅢfirstelevenththirtiethsecondtwelfthfortieththirdthirteenthfiftiethfourth fourteenthsixtiethfifthfifteenthseventiethsixthsixteentheightiethseventhseventeenthninetietheightheighteenthhundredthninthnineteenththousandthtenthtwentiethmillionth/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。如：21st→twenty-first；22nd→twenty-second；33rd→thirty-third；100th→one hundredth2.序数词的句法功能(1)定语the first day of the weekmy first visit to B...
