语法专题 数词 新课标 人教版 课件.ppt

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,*,初中英语数词归纳在初中阶段，数词是中考必考的一个语法点。为了便于同学们系统地复习数词。现就初中阶段数词的主要内容作以下归纳。,数词包括基数词和序数词两大类。,数词基数词序数词两大类。,一、基数词,1,112,的基数词是独立的单词,:one,，,two,，,three,，,four,，,five,，,six,，,seven,，,eight,，,nine,，,ten,，,eleven,，,twelve,。,2,1319,的基数词以,-teen,结尾,:fourteen,，,seventeen,等，但,13,，,15,，,18,较特殊，,13thirteen 15fifteen 18eighteen,。,3,2090,的整十位均以,-,ty,结尾：,sixty,，,ninety,，但,20,，,30,，,40,，,50,，,80,较特殊，,20twenty 30thirty 40forty 50fifty 80eighty,。,4,十位数与个位数之间要加连字符号“,-”:,28twenty-eight,，,96ninety-six,。,5,百位和十位（若无十位则和个位）之间加,and,：,148one hundred and forty-eight 406four hundred and six,。,6,hundred,（百），,thousand,（千），,million,（百 万），,billion,（十亿）等前面即使有具体的数词，也不能在它们的后面加,s,。,600 six hundred,，八百万,eight million,7,1000,以上的数字，从后往前数每三位加一个逗号“，”第一个逗号前为千（,thousand,），第二个逗号前为百万（,million,），第三个逗号前为,billion,（十亿）。,2,，,510 84,，,296 274,，,350,8,hundred,，,thousand,，,million,用复数形式修饰名词时要用“,of,复数名词”,数以百计的年轻人,hundreds of young people,；数以千计的书,thousands of books,。,注意：,hundreds of,thousands of,millions of,复数名词，其前面不能加具体的数词，但可加,several,或,many,。,Several hundreds of trees =several hundred trees several hundred of the trees,(,树中的几百棵,),9,基数词单数名词形容词构成合成形容词。,一个五岁的男孩,a five-year-old boy,；,一座,800,米长的桥,an 800-metre-long bridge,；女子,400,米接力,girls 400-metre relay race,。,10,句型：主语,is,about,（大约）,over,more than,（超过）,nearly,（接近）具体数词,metre,（,s,）,kilometre,（,s,）,kilo,（,s,）,long,high,tall,deep,away,等。,长江长,6300,公里。,The,Changjiang,River is 6,，,300,kilometres,long,二、序数词,1,基数词变序数词可利用口诀巧记：,first,，,second,，,third,，,eight,eighth,nine,ninth,，,five,fifth,，,twelve,twelfth,，,twenty,twentieth,，,forty,fortieth,，,twenty-five,twenty-fifth,。,2,其余情况均在基数词后加,th,：,six,sixth,nineteen,nineteenth,hundred,hundredth,thousand,thousandth,等。,注意,:,four,fourteen,forty-fourth,fourteenth,fortieth,nine,nineteen,ninety-ninth,nineteenth,ninetieth,三、数词的应用,1,钟点的表示：小时、点钟、分钟、秒钟要用基数词。,“几点钟”用基数词加,oclock,。,oclock,可省略,5:00,Its five,（,oclock,）,“,几点过几分，,30,分钟”用介词,past,：,7,：,05,five past seven,；,7,：,15,fifteen,（,a quarter,）,past seven,；,7,：,30,half past seven,。,“,差几分几点”用介词“,to,”,7,：,40,twenty to eight,；,7,：,45,fifteen,（,a quarter,）,to eight,。,日常生活中的时间读法常简化，直接按基数词的顺序读,7,：,05,seven o five,；,7,：,15,seven fifteen,2,编号的表示：,Lesson One,the first lesson,Bus No,3,the No,3bus,表示住所时不用“,No,.”,：,302,房间,Room 302,如果编号的数词比较长，一般用基数词：,Page 457,电话号码，用基数词，可单个读，重复的数字也可读“,double,”,，,如：,3855633,3,年月日的表示：,年份用基数词，先读前一位或两位，再读后两位。,1999nine-teen ninety-nine,；,1900nineteen hundred,；,2000two thousand,；,1905nineteen o five,；,年用基数词，日用序数词：,1998,年,6,月,8,日写作：,June 8,，,1998,；,8 June,1998,4,分数的表达：,分子用基数词，分母用序数词，分子大于“,1”,，分母则加“,s”,：,1,3 one third,，,2,3two thirds,；,1,2 a,（,one,）,half,1,4 one fourth,或,a/one quarter,，,3,4,threefourths,或,three quarters,。,5,倍数的表达：一倍用,once,，,两倍用,twice,，,两倍以上 用基数词,times,：,5,倍,five times,This box is five times as big as that one.,=This box is four times bigger than that one.,=This box is five times the size of that one.,四、特殊用法,1,数词作主语，谓语动词用单数。,Two months is quite a long time,Four and two is six,Whats two and three,？,2,一个半小时,:,one,an hour and a half,one and a half hours,3,不定冠词用在序数词前表又一、再一。,Ive tried three times,，,let me try a fourth time,4.,表示年岁,:,in his forties,in your teens,表示年代,:,in the 1950s(1950s),in the seventies,表示世纪,:,the nineteenth century(1800-1899),5.first,的用法,:(1),形容词,:,最初的，最早的,The first two lessons are difficult.,(2),名词,:,最初，第一；第一位。,Who is first?,(3),副词,:,最初，首先,He comes here first.,6.dozen(,十二,),score(,二十,),的用法,:,two dozen eggs,两打鸡蛋,dozens of eggs,几十个鸡蛋,1,There are _,（,365,）,days in a year,2,Look,！,There are _,（,成千上万的）,stars in the sky,3,_,（,2,3,）,of the students are girls in our class,4,September is the _ month of the year,5,There are forty-six students in Class _,（,三班）,6,December is the _ and last month of the year,.,three hundred and sixty-five,thousand,s,of,Two thirds,ninth,Three,twelfth,7,Ann received a lot of presents on her _ birthday,The twelve-year-old girl felt very happy,8,There are _ students in our class,，,twenty boys and twenty girls,9,Our teacher often tells us that work must come _,10,At the beginning of the _,（,twenty,）,century,，,the worlds population was about 1,，,700 million,twelfth,forty,first,twentieth,