1、数词数词目录基数词序数词分数、小数、百分数什么是数词什么是数词I have five apples.She has two books.She is the first one to get to school.This is the second time to have this meeting.什么是数词什么是数词表示数目多少或先后顺序的词叫数词。数词分为基数词和序数词。基数词表示数目或数量的多少。序数词表示顺序。基数词的表示法基数词的表示法(1)012单独记。如:zero,one,three,ten,eleven等。(2)1319的词尾都是teen。如:fourteen,sevente
2、en等,但13thirteen,15fifteen,18eighteen需要特殊记。基数词的表示法基数词的表示法(3)20及以上的整十的基数词均以ty结尾。20twenty,30thirty,40forty,50fifty,60sixty(4)几十几要加连字符号-。41forty-one,99ninety-nine等。基数词的表示法基数词的表示法(5)几百几十或者几百几十几在百后加and。106one hundred and six,389three hundred and eighty-nine。注意:表示几百的时候用_,不加“S”105,805,905怎么表示?基数词的表示法基数词的表示法
3、(6)四位数及四位数以上的基数词的拼写规律:用逗号从右往左每三位加一个逗号,第一个逗号读作thousand(千),第二个逗号读作million(百万),第三个逗号读作billion(十亿),hundred后莫忘and。基数词的表示法基数词的表示法(6)四位数或者四位数以上的基数词的拼写规律:2,211 two thousand two hundred and eleven;33,123 thirty-three thousand one hundred and twenty-three1.表示确切的数量。There are five students in the room.基数词的用法基数词
4、的用法2.表示不确切的数量。hundreds of 数以百计的 thousands of 数以千计的表示“几百”“基数词+hundred”表示“几千”“基数词+thousand”表示数百 several hundred基数词的用法基数词的用法不加不加s基数词的用法基数词的用法典例:It is reported that people in the world are suffering from the HlNl flu.A.ten thousands B.thousands of C.several thousands of基数词的用法基数词的用法3.表示年龄1)直接用基数词表示。He is
5、 ten./He is ten years old.基数词的用法基数词的用法2)表示一个人的具体岁数,“在.岁”可以用:at the age of+基数词 at the age of 10 at age+基数词 at age 10 at+基数词 at 10基数词的用法基数词的用法3)表示“在某人几十多岁”用“in ones+整十基数词的复数形式”in his twenties 在他二十来岁时in her fifties 在她五十来岁时基数词的用法基数词的用法典例:In his_,Wilson returned to his hometown and began to teach.Athirty
6、 Bthirties Cthirtieth基数词的用法基数词的用法4)表示几岁的,用“基数词-year-old”5-year-old 五岁的在这里,在这里,year不加不加s!基数词的用法基数词的用法4.表示次数、倍数一次 once 两次 twice大于两次:基数词+timesthree times 三次 five times 五次基数词的用法基数词的用法4.表示次数、倍数一次 once 两次 twice大于两次:基数词+timesthree times 三次 five times 五次基数词的用法基数词的用法5.表示时刻(顺读法和逆读法)表示整点:直接用基数词。比如at ten,at sev
7、en,at twelve.表示非整点有顺读法和逆读法两种表示方法。基数词的用法基数词的用法 表示非整点:顺读法顺读法(通用)8:15 eight fifteen 9:20 nine twenty 10:10 ten ten基数词的用法基数词的用法练习练习 用顺读法表示下列时间。用顺读法表示下列时间。1 0:1 0 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1 1:1 5 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 7:30_基数词的用法基数词的用法 表示非整点:逆读法 分钟数30,(60-分钟数)+to+下一个小时“差几分到几点”8:46,four
8、teen to nine,九点不到十四分基数词的用法基数词的用法补充:15分钟用quarter 8:15 a quarter past eight 30分钟用half 8:30 half past eight 基数词的用法基数词的用法a.m.表示上午7 a.m.=7 oclock in the morningp.m.表示下午4 p.m.=4 oclock in the afternoon补充:序数词的表示法序数词的表示法(1)第一、第二、第三分别是first,second,third。序数词的表示法序数词的表示法(2)“第四”到“第十九”除了fifth,eighth,ninth,twelfth
9、是特殊的拼写外,其余的都在相应基数词后面加“th”构成。如:fourfourth,thirteen-thirteenth序数词的表示法序数词的表示法(3)20以上的整十的序数词由相应的基数词变y为i,再加-eth。如:thirty-thirtieth;fifty-fiftieth。序数词的表示法序数词的表示法(4)第一百hundredth;第一千thousandth;第一百万millionth。序数词的表示法序数词的表示法(5)20以上的非整十的基数词变序数词时,只变个位数。twenty-one 变为 twenty-first;thirty-five 变为 thirtyfifthSixty-t
10、hree 变为 sixty-third基数词变序数词基数词变序数词记忆口诀记忆口诀基变序,有规律,词尾加上-th。一,二,三,特殊记,词尾字母t,d,d。八去t,九除e,ve要用f替,ty将y变成i,记住前有个e。若是碰到几十几,只变各位就可以。序数词的用法序数词的用法1)序数词前一般要加定冠词the,表示“第几”Liming is the first one to get toschool.序数词的用法序数词的用法2)可以在序数词(除first)前加a/an,表示“又一,再一”Try a second time and you will succeed.序数词的用法序数词的用法典例:Alth
11、ough I have failed three times,my father encourages me to have a _ try.A.four B.third C.fourth D.fiveC序数词的用法序数词的用法3)形容词最高级前使用序数词,表示“第几个最”The Yellow River is the second longest river in China.序数词的用法序数词的用法4)序数词前有物主代词、指示代词和名词所有格时,不用定冠词。Have you watch her second movie?序数词的用法序数词的用法典例:We are proud of our
12、country.The year 2019 is her _ birthday.A.seventy B.the seventy C.the seventieth D.seventiethC序数词的用法序数词的用法典例:Alice felt very happy to receive some gifts on her _ birthday.Nobody gave her gifts on her former eleven birthdays.A.eleventh B.twelfth C.thirteenth D.twelveB序数词的用法序数词的用法典例:Today postcards ar
13、e the _ most popular collection in the world after stamps and coins.A.first B.second C.third D.fourthC序数词的用法序数词的用法5)序数词修饰谓语动词,省略定冠词theThis team ranks first in this match.序数词的用法序数词的用法6)序数词与基数词连用时,序数词在前。the first three page of the book 这本书的前三页序数词的用法序数词的用法典例:.Please tum to Page_and read the_story.A.Ten
14、;two B.Ten;second C.Tenth;second D.Tenth;twoB序数词的用法序数词的用法典例:I live in Room 403,Sam lives in the room right above mine,on the _ floor.A.third B.three C.fifth D.five C序数词的用法序数词的用法典例:-_ Haojiang Peach Blossom(桃花)Festival took place in late February.Did you go there?-Yes.I took the No.36 bus and then a
15、_ walk to Ju Feng Temple.A.The seventh;20-minute B.The seven;20-minute C.The seventh,20 minutes D.The seven;20 minutesA分数的表达法分数的表达法分数是由基数词作分子,序数词作分母构成的。除了分子是1的情况外,序数词都要用复数。1/4 one fourth 2/3 two thirds练一练:9/10、1/6、4/7用英文怎么表示?分数的表达法分数的表达法【注意】一些特殊的分数表达法:a half 二分之一 a quarter=one fourth 四分之一 three quar
16、ters=three fourth 四分之三分数的表达法分数的表达法典例:What do you think of the environment here?Wonderful!_ of the land covered with trees and grass.A.Two fifths;is B.Two fifth;isC.Two fifths;are D.Two fifth;areA根据它代指的名词的不同,谓语不同。所修饰的名词是 1)可数名词单数形式,谓语用“三单”2)可数名词复数形式,谓语动词用复数形式,即“原形”;3)不可数名词,谓语用“三单”。分数作主语,怎么确定谓语动词的单复数?
17、分数的表达法分数的表达法典例:_ of the girls in our class will join the summer camp to visit England.A.Three fives B.Third fifthsC.Three fifths D.Third fivesC练习练习用所给词的适当形式填空。1.Two _ of the students in our class have been to Disneyland somewhere.(three)2.Christmas comes in the _ month of a year.(twelve)3.Yancheng h
18、as the _ largest population of more than 8 million in Jiangsu Province.(two)thirdstwelfthsecond练习练习用所给词的适当形式填空。4.There are seven days in a week.And Thursday is the _ day.(five)5.Shanghai is a beautiful city.I have been there _ time.(two)6.Today is the little boys _ birthday.(nine)fifthsecondninth练习练习7.Sophie has read four novels this term,and the book she is reading now is the _ one.(five)8.December is the _ month of a year.(twelve)9.What a lovely present the old lady has received for her _ birthday!(eighty)fifthtwelftheighth