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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,*,初中英语语法,数词（,1,）,一、数词的构成,基数词,序数词,1,12,有各自独立的形式。,13-19,都是相对应,3,9,加上,teen,构成，特殊,拼写的词有,thirteen,fifteen,eighteen,。,20,90,都以,-ty,结尾，特殊拼写的有,twenty,thirty,forty,eighty,。,21,99,整数十位数各位数，中间有“”。,百位数，由百位数,and+,两位数组成。,1,3,分别为,first,second,third,。,4,19,都是在后面加上,th,特殊的有,fifth,eighth,ninth,twelfth,。,20,90,把,y,变成,ie,然后加,th,如,twentieth,。,21,99,的序数词变后面的各位数。,序数词可以用缩写，如,1st,2,nd,3,rd,4,th,二,.,基数词的读法,1,、百位和十位间用,and,连接,十位和个位间用,-,连接,three hundred,and,twenty,-,one,321,2,、右往左数,三位一组,逗号隔开,.,依次是,thousand,(,千,),million,(,百万,),billion,(,十亿,),four,thousand,three hundred,and,twenty,-,one,seven,million,six hundred and fifty four,thousand,three hundred,and,twenty,-,one,7,654,321,1,987,654,321,4321,4,321,one,billion,nine hundred and eighty-seven,million,six hundred and fifty-four,thousand,three hundred,and,twenty,-,one,1.hundred,thousand,(,表示确数,),million,billion,2.hundred,s,thousand,s,(,表示概数,),million,s,billion,s,三,.,基数词的用法,数词,(,several,)+,+,of,some,/,many hundred,s,of,1.If a=3,b=4,whats the answer to the problem,a+2ab+1=?,the answer is_.,A.twenty eight,B.twenty-eighth,C.twenty-eight,2.In our school several _ students are able to search the Internet.,A.hunderd of,B.hunderds of,C.hundred,3.Many _ sheep were killed in the accident.,A.thousands of B.thousand,C.thousands,4.There are over nine _ workers in the factory,but _ of young people hope to work in it.,A.hundred;hundreds,B.hundreds;hundreds,C.hundreds;hundred,月日年 在,2008,年,10,月,1,日,四,.,数词的表示法,年月日,on,Octorber,the,first,two thousand,and,eight,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）,on,August the ninth,in,May,two thousand and ten,有日用,on,无日用,in,on,Oct.1,st,2008,月日 在,8,月,9,日,月年 在,2010,年,5,月,1.The accident happened on_.,A.April 5,2001,B.2001,April 5,C.April 2001,5,2.I was born _.,A.in March 8,1993,B.on July 9,1994,C.on May,1995,20,世纪,90,年代,in,the,1990,s,在他,50,多岁时,in his fifties,四,.,数词的表示法,年代世纪,in,the,in ones+,整十基数词复数,在某人几十岁时,nineteen,nineties,1.There will be more chances in _ century than in _ century.,A.twenty-one,twenty,B.twenty-first,twentieth,C.the twenty-first,the twentieth,2.The city changed a lot _.,A.in 1980s,B.in the 1980s,C.in the 1980,3.He graduated in _ of _ century.,A.the sixtieth;twenty,B.sixty;the twentieth,C.the sixties;the twentieth,4.He got the prize _.,A.in his fifties,B.in fifties,C.in his fifty,
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