数词是初中二年级英语学习中的基础性语法内容,也是学生需要重点掌握的基础性语法知识。那么关于数词的用法,大家掌握了哪些呢?今天,沪江小编就为同学们总结一些数词的基本用法,一起来学习吧!
一、基数词
(1)1-20
one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve,thirteen,fourteen,fifteen, sixteen,seventeen,eighteen,nineteen,twenty
(2)21-99 先说"几十",再说"几",中间加连字符。
23→twenty-three,34→thirty-four,45→forty-five,56→fifty-six,67→sixty-seven,78→seventy-eight,89→eighty-nine,91→ninety-one
(3)101-999先说"几百",再加and,再加末两位数或末位数;
586→five hundred and eighty-six,803→eight hundred and three
(4)l,000以上,先从右往左数,每三位数加一个",",第一个","前为thousand.第二个","前为million,第三个","前为billion
1,001→one thousand and one
18,423→eighteen thousand,four hundred and twenty-three
6,260,309→six million two hundred and sixty thousand three hundred and nine
750,000,000,000→seven hundred and fifty billion
二、序数词
(1)一般在基数词后加th
,thirteen→thirteenth
(2)不规则变化
one→first,two→second,three→third,five→fifth,eight→eighth,nine→ninth,twelve-twelfth
(3)以y结尾的十位整数,变y为ie再加th
twenty→twentieth, forty→fortieth, ninety→ninetieth
(4)从二十一后的"几十几"直至"几百几十几"或"几千几百几十几"只将个位的基数词变为序数词。
twenty-first,two hundred and forty-fifth
基数词转为序数词的口诀:
基变序,有规律,词尾加上-th.
一,二,三,特殊记,词尾字母t,d,d.
八去t,九去e, ve要用f替。
ty将y变成i,th前面有个e.
若是碰到几十几,前用基来后用序。
以上就是沪江小编为大家梳理的关于初二英语中数词的用法的相关辅导内容,希望大家能够通过这些语法知识的学习来提升对数词用法的掌握,以此来为自己的英语语法学习奠定良好的基础,也帮助自己提升英语学习的能力和效果。