1~30序数词如下:
first、second、third、fourth、fifth、sixth、seventh、eighth、ninth、tenth;
eleventh、twelfth、thirteenth、fourteenth、fifteenth、sixteenth、seventeenth、eighteenth、nineteenth、twentieth;
twenty-first、twenty-second、twenty-third、twenty-fourth、twenty-fifth、twenty-sixth、twenty-seventh、twenty-eighth、twenty-ninth、thirtieth。
1~30的序数词的缩写如下:
1st,2nd,3rd,4th,5th,6th,7th,8th,9th,10th;11th,12th,13th,14th,15th,16th,17th,18th,19th,20th;21st,22nd,23rd,24th,25th,26th,27th,28th,29th,30th。
序数词的语法:
在英语中,使用序数词时前面要加定冠词 the,但是,在下面的情况下则不加 the:
1、当序数词前有形容词性物主代词或名词所有格修饰时,序数词前不用 the。
例句:Mother was my first teacher in my life.妈妈是我生命中的第一个老师。
2、当表达分数时,序数词前不用 the。
例句:One fifth of the students here are from the country. 这儿1/5的学生来自农村。
3、当表达“又一,再一”时,序数词前不用 the,但可加不定冠词。
例句:Please give me a second chance. 请再给我一次机会。
4、当表达“年月日”时,序数词前不用the。
例句:He was born on June 6th, 1974. 他出生在1974年6月6日。
5、当序数词在句中作状语时,序数词前不用 the。
例句:Who got there second? 谁第二个到那儿的?
6、当表达考试(赛跑等)中获得的名次时,序数词前不用 the。
例句:She stands first in her class. 她在班上成绩排名第一。
一、1~30序数词:first、second、third、fourth、fifth、sixth、seventh、eighth、ninth、tenth;eleventh、twelfth、thirteenth、fourteenth、fifteenth、sixteenth、seventeenth、eighteenth、nineteenth、twentieth;
twenty-first、twenty-second、twenty-third、twenty-fourth、twenty-fifth、twenty-sixth、twenty-seventh、twenty-eighth、twenty-ninth、thirtieth。
二、1~30的序数词的缩写:1st,2nd,3rd,4th,5th,6th,7th,8th,9th,10th;11th,12th,13th,14th,15th,16th,17th,18th,19th,20th;21st,22nd,23rd,24th,25th,26th,27th,28th,29th,30th。
句法功能
序数词在句中可作主语、宾语、定语和表语。
The second is what I really need. 第二个是我真正需要的。(作主语)
He chooses the second. 他挑选了第二个。(作宾语)
We are to carry out the first plan. 我们将执行第一个计划。(作定语)
She is the second in our class.在我们班她是第二名。(作表语)
以上内容参考:百度百科-序数词
一到三十的序数词
1st = first
2nd = second
3rd=third
4th=fourth
5th=fifth
6th=sixth
7th=seventh
8th=eighth
9th=ninth
10th=tenth
11th=eleventh
12th=twelfth
13th=thirteenth
14th=fourteenth
15th=fifteenth
16th=sixteenth
17th=seventeenth
18th=eighteenth
19th=nineteenth
20th=twentieth
21st=twenty-firstu
22nd=twenty-second
23rd=twenty-third
24th=twenty-fourth
25th=twenty-fifth
26th=twenty-sixth
27th=twenty-seventh
28th=twenty-eighth
29th=twenty-ninth
30th=thirtieth
说明
1、许多序数词是由相应的基数词后加th构成的,如:four / fourth,six / sixth,ten / tenth,sixteen / sixteenth,但是nine变为序数词是ninth,而不是nineth。
2、twentieth, thirtieth, fortieth等表示整十的序数词,由相应的基数词将词尾y改为ie,再加th构成。
3、first, second, third通常可缩写为1st, 2nd, 3rd。凡是以th结尾的序数词可缩写为“基数词+th”:4th, 5th, 9th, 11th, 60th, 128th等。
4、非整十的多位数,将个位数变成序数词即可:twenty-first(第21),thirty-sixth(第36),ninety-ninth(第99),three hundred and sixty-fifth(第365)等。
1-100的序数词分为四个类。
1、第一类
first (1st) 第一
second (2nd) 第二
third (3rd) 第三
(在括号里的是缩写形式,均在阿拉伯数字后面加上相应序数词的最后两个字母构成,以下各类与此相同。)这类序数词只有三个,在整个序数词里面是特殊的,就和第一类基数词一样,需要逐个地硬记下来。
2、第二类:
fourth (4th) 第四
fifth (5th) 第五
sixth (6th) 第六
seventh (7th) 第七
eighth (8th) 第八
ninth (9th) 第九
tenth (10th) 第十
eleventh (11th) 第十一
twelfth (12th) 第十二
thirteenth (13th) 第十三
fourteenth (14th) 第十四
fifteenth (15th) 第十五
sixteenth (16th) 第十六
seventeenth (17th) 第十七
eighteenth (18th) 第十八
nineteenth (19th) 第十九
这一类序数词共有十六个。均在相应的基数词后面加上后缀-th构成。要注意其中fifth、eighth、ninth、twelth四个词的拼法。
3、第三类:
twentieth (20th) 第二十
thirtieth (30th) 第三十
fortieth (40th) 第四十
fiftieth (50th) 第五十
sixtieth (60th) 第六十
seventieth (70th) 第七十
eightieth (80th) 第八十
ninetieth (90th) 第九十
这一类全是十位整数的序数词,共八个。它们的构成方法是:先将相应的十位整数的基数词词尾-ty中的y改成i,然后在加上后缀-eth。
4、第四类:
thirty-first (31th) 第三十一
sixty-second (62nd) 第六十二
eighty-seventh (87th) 第八十七
ninety-eighth (98th) 第九十八
这类表示“第几十几”的序数词,跟表示“几十几”的基数词一样简单。在构成方法上均由基数词“几十几”变化而来,十位数不变,仅把个位上的基数词变成序数词就行了。