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1-12的序数词:
first second third fourth fifth sixth seventh eighth ninth tenth eleventh twelfth
拓展资料:序数词是 数词的一种,主要在 英语语法中讲到,在汉语中表示为“第几”。此外,在生日中,描述你出生的日期时,也用到了序数词。比如:May-first (5月1日)
基数词变序数词变化规则:
①基数词变序序数词,在词尾加上-th。
②一,二,三,要特殊记忆,词尾字母t,d,d。
③八去t,九除e,ve要用f替,ty将y变成i,th前面有个e。
④碰到几十几,前是基数词,后是序数词。
序数词的记忆口诀基变序,有规律,词尾加上-th。
序数词 一,二,三,特殊记,词尾字母t,d,d。
八去t,九除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。
Today we will learn Lesson 1 / Today we will learn the first lesson.
thirteenth(第十三),它的基数词是thirteen(十三)
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
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-fift
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。
one—first two—second three—third
four—fourth five—fifth six—sixth
seven—seventh eight—eighth
nine—ninth ten—tenth eleven—eleventh twelve—twelfth thirteen—thirteenth fourteen—fourteenth
fifteen—fifteenth sixteen—sixteent seventeen—seventeenth eighteen—eighteenth nineteen—nineteenth twenty—twentieth
twenty-one—twenty-first、twenty-two—twenty-second、twenty-three—twenty-third、twenty-four—twenty-fourth、twrnty-five—twenty-fifth基变序有规律,一二三特殊记。其余末尾th 。
九去 e, 八去 t 。
f来把 ve 替
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