在生活中,有关数字的表达,有时候不是1、2、3、4……就能说清的,很多情况下,我们要用到”第一“、”第二“、”第三“……,在英语中,这类数词被叫做”序数词“。常见的有以下几种情景:
1.询问日期:
Q:What's the date today? 今天几号?
A:It's March (the) sixth. 今天3月6日。
2.描述名次
She was the third in the exam. 她那次考试第三名。
3.描述先后次序
He came in first. 他第一个进来。
除了描述日期以外,其他用到序数词的情况都明显包含了”次序“的含义,大家不假思索就知道什么情况下要用到序数词了。
怎么把基数词变成序数词?
1.从1-19,一般情况下(除特殊情况以外)只要在基数词后面加上-th就可以了,读作-[θ],如下所示:
特殊拼写:
1 one → first 2 two → second 3 three → third 5 five → fifth
8 eight → eighth 9 nine → ninth 12 twelve → twelfth
规则拼写:
2.从20开始,10的整数倍:将词尾y变成ie,再加-th构成
例:30 thirty → thirtieth 50 fifty → fiftieth
70 seventy → seventieth 90 ninety → ninetieth
3.hundred,thousand,million的序数词均在其后加-th构成,即hundredth,thousandth,millionth
序数词念法:把最后一个基数词变成序数词
例:156 one hundred and fity-sixth
1278 one thousand two hundred and seventy-eighth
200 two hundredth
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