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数词 new.pptx

发布:2017-04-26约2.7千字共20页下载文档
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数词;; ;C.从 21——99 :    整数几十中除twenty,thirty, forty,fifty,eighty为特殊形式 外,sixty,seventy,ninety都是其个位数形式后添加后缀-ty构 成。表示几十几时,在几十和个位基数词形式之间添加连字符 “-”。例如:21 twenty-one 76 seventy-six 注意: forty的拼写。 D.百位数: 基数词101~999,先说“几百”,再加“and”,再加末两位数。 101   320 648 ; E.千位数以上: 1000以上数目,从右向左每三位用“,” 分开,分别读为thousand , million, billion 。 例如:5, 237, 166, 2 34 读作:;questions; 2.基数词用法:;⑵、 “几十”的复数形式可以表示: 几十多岁 ---- “in + one’s +整十的数词复数” 年 代 ----“ in + the +整十的数词复数” My parents are in their forties.   It was in the 1960s/ in the 1960’s In the nineties, most people go to work by bike. ; ;⑹、表示时刻 (注意:表示在几点钟用介词 at) 1)顺读法----先时后分, “几点几分” 9:30 nine thirty 6:21 six twenty-one ;①.月、日、年:在2008年10月1日;二、序数词 ;基数词 序数词 数字写法 one first 1st two second 2nd three third 3rd five fifth 5th eight eighth 8th nine ninth 9th twelve twelfth 12th twenty twentieth 20th twenty-one twenty-first 21st twenty-two twenty-second 22nd twenty-three twenty-third 23rd twenty-four twenty-fourth 24th ; 2.序数词的用法: ①.序数词作定语,前面要加the。 The first truck is carrying a food basket. John lives on the fifteenth floor. She is my first English teacher.(注意:名词前若有名词所有格或名词性物主代词不用the) ②.有时“a/an+序数词+名词”,表示“再一”,“又一” 的意思。 Well have to do it a second time.Shall I ask him a third time? ;三、分数、百分数;1 5;3.百分数的表达与读法: 先读基数词,再读百分号“%”(读作percent)。 5%读作five percent 0.5%读作zero point five perc
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