英语数字的读读写中文版.ppt

英语数字的读写  1.各类英语数字的读写 2.英语数字的书写规则 3.常用单位读法 4.练习  数词的分类 I基数词 1)20以上的数字 21 Twenty-one 78 Seventy-eight 99 Ninety-nine  数词的分类 2)100以上的数字 在英国英语中一定用and,但在美国英语中and往往略去 不定冠词”a只在数的开头才和 hundred, thousand等连用。 101 a/one hundred (and)one 121 a/one hundred(and) twenty-one 999 nine hundred(and) ninety-nine  数词的分类 3)1000以上的数字 逆向第一个逗号读 thousand:向左再推三位,第二个逗号读 million;第 三个逗号读 billion;第四个逗号就是 trillion 1001 a/one thousand (and) one 1121 one thousand one hundred(and) twenty-one 9999 Nine thousand nine hundred(and) ninety-nine 4, 302,000, 000 four billion three hundred(and )two million 1,000,000,000,000 a trillion, one trillion 2, 782, 234, 467 two billion, seven hundred and eighty-two million, two hundred and thirty-four thousand ur hundred and sixty-seven  数词的分类 II序数词 20th twentieth 21st twenty-first 25th twenty-fifth 100th hundredth 101st hundred and first 225th two hundred (and) twenty-fifth 2034th two thousand and thirty-fourth 第二千零三 十四 10,000th ten thousandth 第一万 1, 000,000th (one) millionth 第一百万 1,000,000,000,000 Linth 第十亿  时刻表示法 直接法 借用介词法 Seven fifty-four six to eight 08:15 eight fifteen a quarter past eight nine thirty half past nine 09:45 nine forty-five a quarter to ten 10:03 ten oh three three(minutes)past ten 20:58 twenty fifty-eight two to twenty-one 23:55 twenty-three fifty-five five to midnight  时刻表示法 2.表示正点的用法 11: 00 at 11 oclock sharp 12: 00 twelve hundred hours/ at noon/midday 24: 00 at midnight The meeting starts at 3 oclock sharp; dont be late! 会议三点正准时开始:不要迟到!  时刻表示法 3.当用于军事命令和旅行时间表时,其读法如下 07: 00(Oh)seven hundred hours= 7: 00a. m 09: 15 (Oh) nine fifteen =9:15a.m 13: 45 thirteen forty-five =1:45p 19: 00 nineteen hundred hours =7: 00 p. m 23: 05 twenty-three(oh)five =11:05p.m 24:00 twenty-four hundred hours= midnight am.= ante meridiem(Lat)= before midday[拉丁]午前,上午 p.m.= post meridien=(Lat拉丁) after midday下午  年月日表示法 1.世纪 可用定冠词+序数词+世纪 century表示,也可以用定冠词加百位进数加 s表示 the sixth(6th)