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小升初英语数词考点

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

eg.four→fourth,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。

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