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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,第,62,第五,23,三分之二,5,月,8,日,八,年级,300,7,：,30,Lets have a game,第62第五 23三分之二 5月8日,1,专题复习,Numbers,（数词）,专题复习Numbers（数词）,2,Learning Aims,（学习目标）,1.The,definition,of the numbers,数词的定义,2.The,classification,and,composition,of the numbers,数词的分类及构成规律,3.The,usage,of the numbers,数词的用法,Learning Aims（学习目标）1.The def,3,定 义,数词,是指表示,数量的多少,和,顺序先后,的词。表示数量多少的词叫基数词；表示顺序先后的词叫序数词。分 类,数词,分为,基数词,和,序数词,。,定 义数,4,1.,基数词的形式：,A,从,112,：,one,，,two,，,three,，,four,，,five,，,six,，,seven,，,eight,，,nine,，,ten,eleven,，,twelve,B,从,1319,：,thirteen,，,fourteen,，,fifteen,，,sixteen,，,seventeen,，,eighteen,，,nineteen,一、基数词,:,表示数目的词称为基数词。,1.基数词的形式：一、基数词:表示数目的词称为基数词。,5,注意,：,这里除,eleven,，,twelve,，,thirteen,，,fifteen,，,eighteen,为特殊形式外，,fourteen,，,sixteen,，,seventeen,，,nineteen,都是由其个位数形式后添加后缀,-teen,构成。,注意：,6,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。,C从 2199：,7,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,44 forty-four,注意：,forty,的拼写。,表示几十几时，在几十和个位基数词形式之间添加连字符“-”。,8,D,百位数：,基数词,101,999,，先说“几百”，再加“,and”,，再加末两位数。,如：,101 a/one hundred,and,one,320 three hundred,and,twenty,648 six hundred,and,forty-eight,D百位数：,9,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(,千）,million,（百万）,billion,（十亿）,。,例如：,5,237,166,2 34,billion,million,thousand,hundred,and,E千位数以上：1000以上数目,从右向左每三位用“,10,5,237,166,2 34,读作：,five billion,，,two hundred and thirty-seven million,，,one hundred and sixty-six thousand,，,two hundred and thirty-four,5,237,166,2 34 读作：five bil,11,2,基数词的基本用法：,、表示具体数目,hundred,thousand,million,不用复数。即,three hundred,，,five thousand,six million,(2),、,表示不确定数目,用复数,。即,hundreds of(,数百,),thousands of(,数千,),millions of(,数百万,)+,名词复数,可以用,many/several,修饰，但不能与具体数目连用。,2基数词的基本用法：、表示具体数目,hundred,t,12,二、序数词,表示,顺序,的数词称为序数词。序数词一般以与之相应的基数词加词尾,th,构成。,序数词前一般需加“,the,”,。,二、序数词 表示顺序的数词称为序数词。序数词一般以与之相应的,13,“,基数词”变“序数词”的口诀：,基变序，有规律，,一、二、三特殊记，,first,，,second,，,third,，,从四开始加,th,，,八去,t,，九去,e,加,th,，,五、十二变,ve,为,f,加,th,，,整十后变,y,为,ie,加,th,，,若想表示几十几，只变个位就可以。,“基数词”变“序数词”的口诀：,14,基数词 序数词 缩写法,one first 1,st,two second 2,nd,three third 3,rd,five fi,f,th 5,th,eight,eighth,8th,nine,ninth,9th,twelve twel,f,th 12th,twenty twen,tieth,20th,twenty-one twenty-,first,21st,twenty-two twenty-second 22nd,twenty-three twenty-third 23rd,twenty-four twenty-fourth 24th,基数词,15,三,、,数词的用法,1.,基数词表示编码：,Room 207,207,房,Class 7,，,Grade 8,八年级七班,Page Five,=the fifth page,第五页,Lesson One,=the first lesson,第一课,Bus No.3,=the No.3 bus,3,号汽车,No.1 Middle School,第一中学,注意,：,用此种方法表示时，首字母需大写，不加冠词。,三、数词的用法注意：用此种方法表示时，首字母需大写，不加冠词,16,2,、,电话号码的读法为顺次读出一个个数字，“,0”,读作“,o”,或“,zero”,。,62884405,读作：,six two eight eight four four o(,或,zero)five,数字连续重现时可用“,double,(,双,)”,。,或：,six two double eight double four o(,或,zero)five,。,2、电话号码的读法为顺次读出一个个数字，“0”读作“o”或“,17,在,2018,年,10,月,1,日,3,、年、月、日的表示法：,on,October the first,twenty eighteen,日,the+,序数词,月,（首字母大写）,月日与年之间用,，,分开,年,（两位两位读基数词）,on,Oct.1,st,2018,写法：,读法：,3、年、月、日的表示法：on October the fi,18,4,、,表示时刻,（,注意：,表示在几点钟用介词,at,）,1),在整点,：基数词（+oclock,）,2),顺读法,-,先时后分,“,几点几分”,9:30 nine thirty,6:21 six twenty-one,4、表示时刻（注意：表示在几点钟用介词 at）,19,3),逆读法,-,先分后时,表示“几点过几分”，半小时以内，介词用,past,，,分钟数,+past+,钟点数。,9,:10 ten past,nine,8:20 twenty past eight,3)逆读法-先分后时 表示“几点过几分”，半小时,20,表示“几点差几分”，半小时以上，介词用,to,，,60-,原分钟,+to+,钟点数,+1,。,9:50,ten to ten,7:40,twenty to eight,表示“几点差几分”，半小时以上，介词用to，60-原分钟,21,3)15,分钟：,a quarter,30,分钟：,a half,9:15 a quarter past nine,12:30 half past twelve,3)15分钟：a quarter,22,5:15,6:45,a quarter,分钟逢,15,即 一刻钟,4:40,（,60-,分钟）,+to+,（小时,+1,）,30,分钟,7:50,按顺序读基数词,简化法,3:30,half+past+,小时,=30,分钟,2:10,分钟,+past+,小时,30,分钟,1:00,基数词（,+oclock),整点,读法,例,表示法,时间类型,one oclock,ten past two,half past three,twenty to five,a quarter past five,a quarter to seven,seven fifty,我看我行：,WORK IN PAIRS,5:15a quarter分钟逢154:40（60-分钟）,23,四,、,探究分数、百分数和小数,GR0UP WORK,观察,总结：先读分子，再读分母。分子用基数词，分母用序数词。分子大于,1,时，分母加,-s,。,1,5,1,3,1,7,3,5,23,5,6,one fifth,one seventh,one third,three,fifth,s,two,third,s,five,sixth,s,四、探究分数、百分数和小数GR0UP WORK 观察11,24,Notice:,1,分子为,one,时可换用“,a”,。,2,1/2,读作“,a(one)half,”(,而不是,a second“,一秒钟”,),；,1/4,既可读作“,a(one)quarter,”,，,又可读作“,a(one)fourth,”,。,Notice:,25,1,5,分子 基数词,分母 序数词,one fifth,2,7,分子,1,分母,+s,two sevenths,1,4,分子,a,分母,quarter,a quarter,3,4,three quarters,1,2,a half,1,3,three and one third,3,基数词,+and+,分数,Lets have a try,：,1分子 基数词one fifth2分子 1two sev,26,百,分数的读法：,先读基数词，再读百分号“,%”(,读作,percent,),。,5%,读作：,five percent,80%,读作：,eighty percent,200%,读作：,two hundred percent,百分数的读法：,27,小数的读法：,小数点前的基数词与前面所讲的基数词读法完全相同，小数点读作“,point,”,，小数点后只需将数字一一读出。,15.67,读作,fifteen,point,_,six,_,seven,0.009,读作,zero point zero zero nine,0.5%,读作：,zero point five percent,小数的读法：,28,“一倍”,once,“两倍”,twice,，,“三倍”,three time,s,(,三倍或以上 基数词,times),1.,倍数的表示法：,五、数词的其他运用,“一倍”once 1.倍数,29,My parents are,in their forties,.,It was,in the 1960s/in the 1960s,In the nineties,most people went to work by bike.,My parents are in their fortie,30,2.,“基数词,+,名词,+,（形容词）”的合成形容词作定语。,a,seven-day,holiday,一个七天的假期,Kate is,an,eighteen,year,old girl.,凯特是个,18,岁的女
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