中考英语必备语法之数词的用法 ppt课件(共13张PPT) (1).pptx

1、四、数词： ? 1、分类：数词有基数词和序数词两种。英 语的数词可以作句子的主语、宾语、表语 和定语。 ? 2、基数词：表示数目的词叫基数词。 1、 英语中常用的基数词有： 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 14 15 16 17 18 19 thirtee n fourte en fifteen sixtee n sevent een eighte en ninete en 20 30 40 50 60 70 80 90 100 twenty

2、 thirty forty fifty sixty sevent y eighty ninety one(a) hundr ed 23 35 101 twenty- three thirty-five one hundred and one ? 1000one(a) thousand,10000 ten thousand,100000one hundred thousand ,1000000one million,10000000ten million, 100000000one hundred million, ? 108one hundred and eight, 146one hundr

3、ed and forty-six, 500five hundred , 1001one thousand and one, 1813one thousand eight hundred and thirteen. ? 2、注：(1)百位与十位之间要加and；十万 位和万位,亿位和千万位之间通常也要加 and。 ? (2)英语用千、百万等单位计数,大数字从右 向左看, 每隔三位划一逗号,倒数第一个逗 号之前要用thousand,倒数第二个逗号之前 要用million,倒数第三的逗号之前要用billion 表示。 (3) hundred、 thousand、 million作数词时,不 用复数,前

4、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。如：five hundred( 五百), hundreds of(成百上千的), ten thousand(一万), thousands of(成千上万的), millions of(成百万的) ? 3、序数词：表示顺序的数词叫序数词。 ? 1、 英语的序数词基本变法： ? (1) 一般在基数词后加th,(2)-ve结尾的改为- fth,(3)-ty结尾的改为-tieth,(4)熟记特殊词。 2、序数词如下： 1st 2nd 3rd 4th 5th

5、6th 7th 8th 9th 10th 11th 12th first secon d third fourth fifth sixth seventh eighth ninth tenth elevent h twelfth 13th 14th 15th 16th 17th 18th 19th thirteen th fourtee nth fifteent h sixteent h sevente enth eightee nth ninetee nth 20th 30th 40th 50th 60th 70th 80th 90th 100th twentiet h thirtieth

6、fortieth fiftieth sixtieth seventie th eightiet h ninetiet h one undredt h 21st 22nd 23rd 35th 101st twenty- first twenty- second twenty- third thirty- fifth one hundre d and first ? 1000thone thousandth, 1000000th one millionth., 第703the seven hundred and third, ? 第5480the five thousand four hundre

7、d and eightieth. ? 3、注：(1)两位以上的序数词仅个位数部分 用序数词,其余部分仍用基数词。如：thirty -sixth, ? (2) 使用序数词时一般加定冠词the. 如：Im in the third grade. ? (3) 序数词作“几分之几”讲时,有复数形 式。如：1/5one fifth ; 2/3 two thirds ; 4/7 four sevenths ; 1/2 a half ; 1/4a quarter ; 3/4 three quarters ; 50% fifty hundredths ( fifty per cent). ? 4、数词的用法：

8、 ? 1、表示年份：2002: twenty 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 105Room one

9、0 five; Bus No.13Bus Number Thirteen; P.5Page Five; Tel.No.7658659Telephone 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： 1/2half, 半小时half an hour, 1.5小时one and a 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”。如：The third lesson is rather difficult.(第三课相当难)/ Shall we read the text a third time?(我们把课文读第 三遍,好吗？)