数词 new.pptx
文本预览下载声明
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
显示全部