数词是表示数量和顺序的词。数词有两种:表示数目的词称为基数词,如one,two,three等等。表示顺序的词称为序数词,如first,second等。下面将就数词的构成及用法作详细讲解。1.基数词的构成基数词中最基本的是one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve这十二个数字。13—19在three,four…nine的后面加后缀“teen”构成,但 Numerals are words that indicate quantity and order. There are two types of numbers: the number that represents the number is called a radix, such as one, two, three, and so on. The order of the words known as ordinal, such as first, second and so on. The following will explain the composition and usage of numerals in detail. 1. The formation of the base number The most basic of the base number is one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve these twelve numbers. 13-19 posed in three, four ... nine suffix “teen ”, but