1一29的基数词和序数词答:英语1到20的基数词和序数词怎么写!基数词:one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve, thirteen, fourteen, fifteen, sixteen, seventeen,eighteen, nineteen. 序数词: 第1 first 1st 第2 second 2nd 第3 third 3rd 第4 fourth 4th 第5 fifth 5th 第6 sixth 6th 第7 seventh 7th ...