numeral数词
分类:基数词和序数词;
作句子的主语、宾语、表语和定语;
一、基数词
表示数目的词;
一千,one|a thousand;
一万,ten thousand;
十万,one hundred thousand;
百万,one million;
千万,ten million;
亿,one hundred million;
十亿,billion;
百亿,ten billion;
千亿,one hundred billion;
万亿,trillion;
数字的正确表达:
1、大数字从右向左看;
2、每隔三位划一逗号;
3、倒数第一个逗号之前要用thousand,倒数第二个逗号之前要用million,倒数第三个逗号之前要用billion,倒数第四个逗号之前要用trillion;
4、百位与十位之间加and;
注意:
1、hundred|thousand|million作数词时,不用复数;
2、前面可加上one|two...等其它数词;
3、用作名词时复数表示“成...上...”,后面必须有of,前面可以加上some|many|several等词,five hundred,hundreds of好几百,some thousands of好几千,four thousands of四千左右;
例:七百八十二亿四千零八万四千七百六十九
78240084769-->78,240,084,769
seventy eight billion two hundred and fourty million eighty four thousand seven hundred and sixty nine
例:18,911,758,546
18 billion9 hundred and 11million 7 hundred and 58 thousand5 hundred and46
二、序数词
表示顺序的数词;
1000th --> one thousandth;
1000000th --> one millionth:
第703 --> the seven hundred and third;
第5480 --> the five thousand four hundred and eightieth;
注意:
1、两位以上的序数词个位数部分用序数词,其余部分用基数词;
2、使用序数词时一般加定冠词the;
thirty-sixth
I'm in the third grade.
3、序数词作“几分之几”有复数形式;
1/5 --> one fifth
2/3 --> two thirds
4、hundred|thousand|million作数词时,不用复数,前面可以加上one|two...等其它数词;
用作名词时,复数表示“成...上...”,后面必须要有of,前面可以加上some|many|several等词;
five hundred
hundreds of成百上千的
三、数词用法归纳
1、表示年份
2002,two thousand and two;
1976,nineteen seventy-six;
2、表示日期
12月1日,Dec.1st或the first of December;
2002年11月8日,Nov. 8th, 2002.;
3、表示时刻
5:15,five fifteen或a quarter past five;
8:30,eight thirty或half past eight;
10:45,ten forty-five或a quarter to eleven;
4、表示编号
Room 105,Room one o five;
Bus No.13,Bus Number Thirteen;
P.5,Page Five;
Tel.No.7658659,Telephone Number seven-six-five-eight-six-five-nine;
5、小数的读法
5.7,five point seven
0.16,zero point one six
6、“半”的表达
1/2,half
半小时,half an hour;
1.5小时,one and half hours或one hour and a half;
7、序数词前面加the时表示“顺序”,加a/an时表示“再一,又一”
The third lesson is rather difficult.
Shall we read the text a third time?
习题
1、My cousin's birthday in on thefirstof October.
日期的表达2004年11月8日
美式:月/日/年,November eighth, 2004
英式:日/月/年,8th November, 2004或the eighth of November, 2004
2、What date is it today? It's the 12thof April.
3、There are some hundreds ofbooks in our classroom.
4、We live inthe twenty-first century.
5、He joined the army onthe firstof May 1980.
6、September is the ninthmonth of the year.
7、December the twenty-fifthis Christmas.
8、There arefivepeople in my family. We lie on thesixthfloor in a tall building.
9、My father returned at 10 0'clock on the nightof June 15.