
数词 数词的概念: 表示数目多少或者顺序先后的词叫数词。 数词的分类: 1.表示数目多少的叫基数词;如:one一,two二,three三,four四。 2.表示顺序先后的词叫序数词。如:first第一,second第二,third第三。 基数词 基数词的构成: 1-12形各异 1 2 3 4 5 6 7 8 9 10 11 12 one two three four five six seven eight nine ten eleven twelve 13-19结尾均是“teen” 13 14 15 16 17 18 19 thirteen fourteen fifteen sixteen seventeen eighteen nineteen 20-90整十数结尾均是“ty” 20 30 40 50 60 70 80 90 twenty thirty forty fifty sixty seventy eighty ninety 21-99在整十位的数词后加上个位的数词,中间加上连字符“-” 21 32 45 67 89 twenty-one thirty-two forty-five sixty-seven eighty-nine 101-999的构成要在百位数与十位数之间加and 158 one hundred and fifty-eight 369 three hundred and sixty-nine 457 four hundred and fifty-seven 743 seven hundred and forty-three 999 nine hundred and ninety-nine 1000以上的数字,从后向前数,每三位数加一“,”; 第一个“,”前为thousand(千),第二个“,”前为million(百万)……。 1,002 one thousand and two 12,300 twelve thousand and three hundred 378,456 three hundred and seventy-eight thousand four hundred and fifty-six 6,569,782 six million five hundred and sixty-nine thousand seven hundred and eighty-two 37,389,146 thirty-seven million three hundred and eighty-nine thousand one hundred and forty-six 基数词的用法:(有数字无s) 前有基数词时,hundred、thousand、million后不加s 如:There are seven hundred students in our school. 在我们学校有七百个学生。 hundreds of成百上千的、thousands of成千上万的 如:There are thousands of trees on the farm. 农场里有成千上万的树。 序数词 一、序数词的构成: 1. 123特殊记 第一 first 1st 第二 second 2nd 第三 third 3rd 4-19由相应的基数词+th构成,但注意有特殊变化(fifth,eighth,ninth,twelfth) 第四 第五 第六 第七 第八 第九 第十 第十一 第十二 fourth fifth sixth seventh eighth ninth tenth eleventh twelfth 4th 5th 6th 7th 8th 9th 10th 11th 12th 20-90整十数,变y为ie,+th 第二十 第四十 第五十 第六十 第九十 twentieth fortieth fiftieth sixtieth ninetieth 20th 40th 50th 60th 90th 5.要是遇到第几十几的序数词时,只有个位数用序数词 第三十一 第四十二 第五十三 第六十五 第八十八 第九十九 thirty-first forty-second fifty-third sixty-fifth eighty-eighth ninety-ninth 31st 42nd 53rd 65th 88th 99th 6.百、千、万的序数词有hundred-hundredth,thousand-thousandth 第三百 three hundredth 第四千 four thousandth 二、序数词的用法: 【the/形容词性物主代词+序数词】-【重点】 1.序数词前一般要加定冠词the。 如:Our classroom is on the second floor.我们的教室在二楼。 2.序数词前有物主代词,指示代词或名词所有格修饰时,不能再用定冠词the。 如:David is her third son. David是她的第三个儿子。 3.形容词的最高级前可以使用序数词,表示“第……最……的”。 如:The Yellow River is the second longest river in China. 黄河是中国第二长河。 常见表达 一、时刻-【重点】 顺读法 倒读法 (≤30用past,>30用to) 30分钟常用half;15分钟常用a quarter 7:00 seven o’clock / 8:15 eight fifteen a quarter past eight 9:25 nine twenty-five twenty-five past nine 10:30 ten thirty half past ten 11:46 eleven for ... ...
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