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1、四、数词 考点一考点一 基数基数词词 数字数字基数基数词词形式形式例例词词012各自独立各自独立zero 0;one 1;nine 9;twelve 12131939+重重读读teen结结尾尾特殊:特殊:thirteen 13;fifteen 15;eighteen 18一般:一般:fourteen 14;sixteen 162090整十整十位数位数以以ty结结尾尾twenty 20;thirty 30;forty 40;fifty 50;sixty 60;seventy 70;eighty 80;ninety 90数字数字基数基数词词形式形式例例词词两位数(几两位数(几十几)十几)整十位数整
2、十位数-个位数个位数twenty-one 21;thirty-five 35;ninety-eight 98三位数(几三位数(几百几)百几).hundred and+两位数两位数seven hundred and eighty-five 785;two hundred and ten 210多位数多位数从右向左数起,每隔三从右向左数起,每隔三位数加一个逗号,依次位数加一个逗号,依次为为thousand(千千),million(百万百万),billion(十十亿亿),逗号中逗号中间间三位数三位数76,832,154,968seventy-six billion eight hundred and
3、 thirty-two million one hundred and fifty-four thousand nine hundred and sixty-eight【巧学妙巧学妙记记】巧巧记记100以内的基数以内的基数词词基数基数词词不不难记难记,找清,找清规规律很容易;十二以内律很容易;十二以内词词各异,各异,十三数到十九去,后加十三数到十九去,后加teen莫忘莫忘记记;二十、三十至九十,正式之后有二十、三十至九十,正式之后有-ty;要要说说“几十几几十几”,中,中间间“-”别丢别丢弃;弃;a hundred是是“一百一百”,请请你你记记住莫大意。住莫大意。考点二考点二 序数序数词词 数
4、字数字序数序数词变词变化化规则规则例例词词1、2、3不不规则变规则变化化first第一第一;second第二;第二;third第第三三419基数基数词词词词尾加尾加th特特殊殊:fifth 第第五五;eighth 第第八八;ninth 第九;第九;twelfth第十二第十二一般:一般:fourth第四;第四;nineteenth第十九第十九20、30 90ty变为变为tie再加再加thtwentytwentieth第二十第二十ninetyninetieth第九十第九十两位数或多两位数或多位数(整数位数(整数除外)除外)只只变变个位数个位数(hundred,thousand等只在等只在词词尾加尾
5、加th)twenty-third 第第二二十十三三;one hundred and fifty-ninth 第第一一百百五十九;五十九;hundredth 第一百第一百【温馨提示温馨提示】(1)序序数数词词要要加加定定冠冠词词the,但但若若序序数数词词前前有有形形容容词词性性物物主主代代词词或或名名词词所有格所有格时时省略省略the。例如:。例如:Tom made the mistake for the third time.=It was Toms third time to make the mistake.这这是是汤汤姆第三次出姆第三次出错错。(2)序数序数词词前加前加a/an表示表示
6、“又一,再一又一,再一”。例如:。例如:Even though the Greens have 3 children,they still want a fourth one.尽管格林夫尽管格林夫妇妇已有已有3个孩子,可他个孩子,可他们还们还想再要一个。想再要一个。(3)序序数数词词可可以以用用阿阿拉拉伯伯数数字字和和序序数数词词拼拼写写的的最最后后两两个个字字母母简简写写。例如:例如:1st第一,第一,2nd第二,第二,3rd第三,第三,4th第四。第四。【巧学妙巧学妙记记】基数基数词变词变序数序数词规词规律律基基变变序,有序,有规规律,末尾加上律,末尾加上-th。一、二、三特殊一、二、三特
7、殊记记,面目全非要注意。,面目全非要注意。八加八加th,九去,九去e,ve要用要用f替。替。逢十改逢十改y为为ie,后跟,后跟-th莫忘莫忘记记。若想表示几十几,只若想表示几十几,只变变个位就可以。个位就可以。考点三考点三 数数词应词应用用 名称名称表表 达达 法法例例 词词年份年份日期日期月,日,年(日用序数,年月,日,年(日用序数,年用基数)用基数)特特别别提示:年份的提示:年份的读读法可先法可先读读前两位数前两位数,再再读读后两位数后两位数,读读日日时时要加要加the1997年年3月月21日日March the twenty-first,nineteen ninety-seven日,月,
8、年日,月,年(the+序数序数词词+of+月,年)月,年)2007年年3月月21日日the twenty-first of March,two thousand and seven年代年代in+the+数数词词的复数形式的复数形式在在18世世纪纪20年年代代in the 1720s/1720s读读作作:in the seventeen twenties名称名称 表表 达达 法法例例 词词时时刻刻时时在前,分在后,按基数在前,分在后,按基数词读词读10:15 ten fifteen分在前,分在前,时时在后在后“几点几点过过几分几分”用用past,分分钟钟数数须须小于半小小于半小时时(包括半小(包
9、括半小时时在内)在内)7:05 five past seven7:15 fifteen past seven 7:30 half past seven“几几点点差差几几分分”,用用介介词词to,但但分分钟钟数数须须在在半半小小时时以以内内(不不包包括括半半小小时时在内)在内)7:57 three to eight11:46 fourteen to twelve2:40 twenty to three几刻几刻钟钟一刻一刻钟钟:a quarter三刻三刻钟钟:three quarters九点一刻:九点一刻:a quarter past nine名称名称 表表 达达 法法例例 词词编编号号给给东东西
10、西编编号号时时,序序号号在在前前用用序序数数词词,序号在后用基数序号在后用基数词词lesson twelve=the twelfth lesson分分数数分分子子用用基基数数词词,分母用序数分母用序数词词记记忆忆口口诀诀:分分子子基基,分分母母序序,分分子子大大于于1,分母加,分母加s特特别别提示:提示:通常用通常用a/one half表示。表示。用用a/one quarter表示表示 one third two thirds four fifths seven tenths带带分数:当分数前面分数:当分数前面带带有整数有整数时时,要用,要用连连词词and连连接接two and two thi
11、rds名称名称 表表 达达 法法例例 词词倍数倍数英英语语用用twice表表示示两两倍倍,两两倍倍以以上用基数上用基数词词加加times表示表示twice两倍两倍three times三倍三倍forty times四十倍四十倍.用所用所给给数数词词的适当形式填空的适当形式填空1.I have tried three times,and the teacher asks me to have a _(four)try.2.Even a child knows September is the _(nine)month of a year.3.Ive bought a present for my
12、 fathers _(forty)birthday.4.Mr.Smith lives on the _(six)floor.5.Climb up to the _(eleven)floor,and you can enjoy a better view.单项选择单项选择1.There are _ days in a week and Tuesday is _ day of the week.A.seven;third B.seven;the thirdC.seventh;three D.the seventh;three2.There are 60 students in my class a
13、nd 44 of them use weibo very often.44?That means about _ of your classmates are weibo users,right?A.half B.one thirdC.two thirds D.three quarters【解解析析】选选D。考考查查数数词词的的用用法法。half二二分分之之一一;one third 三三分分之之一一;two thirds三三分分之之二二;three quarters四四分分之之三三。由由常常识可知识可知44大约是大约是60的四分之三,的四分之三,故选故选D。3.Eight _ students
14、 in our school are from countryside.A.hundreds B.hundred C.hundreds of D.hundred of4.He wrote his _ novel when he was _.A.five;fifties B.fifth;fiftyC.fifth;fiftieth5.July 1st of this year is _ birthday of CPC(中国共中国共产产党党).A.ninety B.the ninety C.the ninetieth6.Kangkang is a school boy.He got a good g
15、ift on his _ birthday.A.fourteenth B.fortieth C.the fortieth7.I dont believe that this _ boy can paint such a nice picture.A.five years old B.five-years-oldC.five-year-old8.About _ of the students in Grade Nine this year were born in the _.A.three five;1996B.three fifths;1990sC.third fifth;1997D.third fifths;1990s9.If a=4,b=5,whats the answer to the question“a+2ab+1=?”_.A.Forty-fifthB.Forty-fiveC.Twenty-threeD.One hundred and twenty-one10.Do you have enough students to clean the laboratory?No,I think we need _ students.A.another B.two others C.more two D.two more
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