小学英语数词讲解与练习题
数词专练
数词是表示数量多少或顺序先后的词。分为基数词和序数词。
. 基数词一one, two, three等。1. 表示数量多少的词是基数词，如：2. 数词的构成12个各不相同的词表示。one到twelve，1）从1－12分别由从one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve
-teen结尾。13－19均以后缀2）从thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen
”时，个位和十位之间需加连字符。-ty结尾。表示“几十几3）从20－90的整十数词均以后缀twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety
43 forty-three 32 thirty-two 21 twenty-one
hundred构成。—9加4）整百数由1500 five hundred
100 one (a) hundred
。如果十位数为零，那-”and连接，十位与个位之间要加连字符“5) 整百数和整十数之间由and 连接。就在百位和个位之间用245 two hundred and forty- five
101 one hundred and two
以上的数，要用计数逗点，即从个位开始，每隔三位数加一逗点，第一个逗点处）1,0006 例如：million(百万) 是thousand(千)，第二逗点处是000→a(one)thousand1，ur thousand five hundred and ninety-six 4,596→fo thousand
000→ten10，thousand two hundred and sixty-one 18,261→eighteen thousand
000→a(one)hundred100，hundred and sixty-six thousand one hundred and thirty-two
766,132→seven
Exercise:
写出下列数字20 12 14
19 40 90
600 400
35 78
678 305
二、序数词
序数词表示排列顺序，如first, second, third等。
构成规则：
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