2023高考英语词汇之序数词
序数词
1.序数词的构成
序数词除了开头的三个词(first，second，third)有独特的形式外，其他都是在基数词词尾加-th构成。
基本序数词的构成:
(1)1st first
2nd second
3rd third
4th fourth
5th fifth
6th sixth
7th seventh
8th eighth
9th ninth
10th tenth
(2)11th eleventh
12th twelfth
13th thirteenth
14th fourteenth
15th fifteenth
16th sixteenth
17th seventeenth
18th eighteenth
19th nineteenth
(3)20th twentieth
21st twenty-first
22nd twenty-second
23rd twenty-third
24th twenty-fourth
25th twenty-fifth
26th twenty-sixth
27th twenty-seventh
28th twenty-eighth
29th twenty-ninth
(4)30th thirtieth
40th fortieth
50th fiftieth
60th sixtieth
70th seventieth
80th eightieth
90th ninetieth
100th one hundredth
1000th one thousandth
1,000,000th one millionth
1,000,000,000th one billionth
第20、30、40、50、60、70、80、90是将基数词词尾-y改为-i加-eth构成。如thirtieth，seventieth。
其他序数词由以上基本序数词构成。仅把个位数变成序数词，十位数不变。如twenty-first，twenty-second，twenty-third，twenty-fourth，twenty-fifth等。
序数词的缩写形式是在数字后直接加上序数词最后两个字母构成。如1st，2nd，3rd，4th，21st，22nd，34th等。
100以上的序数词的表示法如下：
第100为100th(读作one hundredth)，第101为101st(读作one hundred and first)其他的情况类推。
2.序数词的语法功能
序数词在句中可作主语、表语、宾语、定语等。
The second was a tall man.(主语)
第二个人是高个男子。
I am the second to invite you. (表语)
我是第二个邀请你的。
Do you prefer the first or the second?(宾语)
第一个和第二个你更喜欢哪一个呢?
序数词
1.序数词的构成
序数词除了开头的三个词(first，second，third)有独特的形式外，其他都是在基数词词尾加-th构成。
基本序数词的构成:
(1)1st first
2nd second
3rd third
4th fourth
5th fifth
6th sixth
7th seventh
8th eighth
9th ninth
10th tenth
(2)11th eleventh
12th twelfth
13th thirteenth
14th fourteenth
15th fifteenth
16th sixteenth
17th seventeenth
18th eighteenth
19th nineteenth
(3)20th twentieth
21st twenty-first
22nd twenty-second
23rd twenty-third
24th twenty-fourth
25th twenty-fifth
26th twenty-sixth
27th twenty-seventh
28th twenty-eighth
29th twenty-ninth
(4)30th thirtieth
40th fortieth
50th fiftieth
60th sixtieth
70th seventieth
80th eightieth
90th ninetieth
100th one hundredth
1000th one thousandth
1,000,000th one millionth
1,000,000,000th one billionth
第20、30、40、50、60、70、80、90是将基数词词尾-y改为-i加-eth构成。如thirtieth，seventieth。
其他序数词由以上基本序数词构成。仅把个位数变成序数词，十位数不变。如twenty-first，twenty-second，twenty-third，twenty-fourth，twenty-fifth等。
序数词的缩写形式是在数字后直接加上序数词最后两个字母构成。如1st，2nd，3rd，4th，21st，22nd，34th等。
100以上的序数词的表示法如下：
第100为100th(读作one hundredth)，第101为101st(读作one hundred and first)其他的情况类推。
2.序数词的语法功能
序数词在句中可作主语、表语、宾语、定语等。
The second was a tall man.(主语)
第二个人是高个男子。
I am the second to invite you. (表语)
我是第二个邀请你的。
Do you prefer the first or the second?(宾语)
第一个和第二个你更喜欢哪一个呢?
