序数词前用不定冠词,表示"又一,再一"的意思,那么a second, a first
序数词前一般用定冠词,用不定冠词时,可以表示“又一”或“再一”的意思。比如我已经有了两个,再给我一个,就可以用a third。
英语序数词第1-19除first,second与third有特殊形式外,其余均由基数词加后缀-th构成。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,也会用到序数词。比如:May-first (5月1日);在英语学习中,常常需要区分基数词和序数词。
有时,序数词可以用缩写形式来表示。主要缩写形式有:
1~30序数词
1-10:first、second、third、fourth、fifth、sixth、seventh、eighth、ninth、tenth
11-20:eleventh、twelfth、thirteenth、fourteenth、fifteenth、sixteenth、seventeenth、eighteenth、nineteenth、twentieth
21-30:twenty-first、twenty-second、twenty-third、twenty-fourth、twenty-fifth、twenty-sixth、twenty-seventh、twenty-eighth、twenty-ninth、thirtieth。
其中1st,2nd,3rd为特殊形式,其它的都是阿拉伯数字后加th。(以1,2,3结尾是st,nd,rd。 eg:twenty-first----21st)
其他好像没怎么见到过
那么a second, a first ,athird ,什么意思
英语序数词第1-19除first,second与third有特殊形式外,其余均由基数词加后缀-th构成。现将第1-19序数词(包括其缩写式)列出如下:
first 1st
second 2nd
third 3rd
fourth 4th
fifth 5th (fif加th)
sixth 6th
seventh 7th
eighth 8th(后只加h)
ninth 9th(nin加th)
tenth 10th
eleventh 11th
twelfth 12th (twelf加th)
thirteenth 13th
fourteenth 14th
fifteenth 15th
sixteenth 16th
seventeenth 17th
eighteenth 18th
nineteenth 19th。
十位数的序数词的构成方法是:先将十位数的基数词的词尾ty中的y变为i,然后加后缀-eth。如:twentieth 20th,thirtieth 30th,fortieth 40th。
十位数的序数词如包含1-9的个位数时,十位数用基数词,个位数用序数词,中间须有连字符“-”。如:twenty-first 21st,thirty-second 32nd,forty-fourth 44th,eighty-seventh 87th。
百、千、万等的序数词由hundred,thousand等加-th,前面加有关的基数词构成。如:
(one) hundredth 100th
(one) thousandth 100th
ten thousandth 10 000th
(one) hundred thousandth 100 000th
(one) millionth 1 000 000th
ten millionth 10 000 000th
(one) hundred millionth 100 000 000th
(one) billionth 1 000 000 000th
注意序数词hundredth,thousandth, millionth, billionth之前的“一”只可用one,不可用a。
这些多位数序数词的后位数如包含1-9时,后位数用序数词,前位数用基数词,中间出现零时,须用and连接。如:
two hundred and first 201st
three thousand two hundred (and) twenty-first 3221st
序数词在句中可用作主语、表语、宾语、定语、同位语和状语等。
1)用作主语。如:
The first is better than the second. 第一个比第二个要好。
The first of October is our National Day. 10月1日是我们的国庆节。
2)用作表语。如:
She was (the) fourth in the exam. 她考试得第四名。
She was the third to arrive. 她是第三个到达的。
3)用作宾语。如:
He was among the first to arrive. 他是首批到达的。
He held up a piece of paper folded into fourths. 他拿起一张摺成四摺的纸。
4)用作定语。如:
A third man entered the room. 又有第三个人进入房间。
January is the first month of the year. 正月是一年中的第一个月。
试比较:the first two chapters 最前的两章;the two first prizes 两个第一奖。
5)用作同位语。如:
On Friday , the 10th, Mr. and Mrs. Cole celebrated their silver wedding-day. 科尔夫妇于10日星期五庆祝他们的银婚。
Who is that man, the first in the front row? 前排第一个人是谁?
6)用作状语。如:
When did you first meet him? 你什么时候和他首次见面的?
He came second in the race. 他赛跑获第二名。
我有2个,再给我一个,用a third
理解一下