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1、专题四 数词.命题点1 基数词与序数词.基础知识1.基数词与序数词的转换常见一百以内的基数词与序数词变化规则表：onefirsttwosecondthreethirdfourfourthfivefifthsixsixthsevenseventheighteighthnineninthtententheleveneleventhtwelvetwelfththirteenthirteenthfourteenfourteenthfifteenfifteenthsixteensixteenthseventeenseventeentheighteeneighteenthnineteennineteent
2、htwentytwentieththirtythirtiethfortyfortiethfiftyfiftiethsixtysixtiethseventyseventietheightyeightiethninetyninetieth2.基数词的用法 表示确数“大于1的基数词+普通不定代词+名词”作定语修饰名词时，名词用复数形式。例：two more students;基数词+度量单位+形容词(long/wide/deep/high.)表示计量。例：He is 1.91 meters tall. 他身高1.91米。 “基数词+连字符+名词/形容词”作定语修饰名词时，名词用单数形式。例：a fi
3、fteen-year-old boy；a ten-minute walk= ten minutes walk。 表示年龄用阿拉伯数字或基数词表示。 例：20/twenty years old 二十岁。at the age of+基数词，意为“在.岁时”，后面不再加years old。in ones+整十数的复数形式，表示“在某人几十多岁时”。3.序数词的用法序数词前若有名词所有格、形容词性物主代词等限定词时，则不加the；表示顺序时，序数词前必须加the，其后接可数名词单数；序数词前面也可以加不定冠词a或an，表示“又一，再一”，内含顺序性；物品编号时，序号在前用序数词，序号在后用基数词，即“
4、名词+基数词=the+序数词+名词”，有时可以直接用数字来表示；表示在多少世纪时用序数词，其前用介词in。【拓展】：解答此类试题时可按照以下方法来判断应填序数词还是副词： 填序数词the+序数词+名词， 例： the twentieth century；序数词表示列举， 例：first，second，third；名词所有格+序数词+名词， 例：my daughters eighth birthday；形容词性物主代词+序数词+名词，例：my fourth try。 填副词once/twice a day/week/month/year 动词+once/twice 除此之外考生还需掌握基数词变序
5、数词的规律。.练习题1.-Mum, the beautiful card I made last night is just for your birthday.-Oh, thank you, my dear!A.fortyB.fourteenC.fortiethD.fourth2.The old lady living on the (five) floor sometimes dances with her husband on the square.3.Please pass me the (six) dictionary from the left in the bookcase.4.
6、I went to that game with my mom and Joe on my (twelve) birthday.5.He has failed twice, but he wont give up a ( three) chance. 6.It was my parents (nine) wedding anniversary yesterday. They were both very happy. 7.Its his (two) try to deal with this problem. He hopes he can succeed.8.Its a good habit
7、 to brush our teeth (two) a day.9.I visit my grandparents (one) a week. Theyoften cook delicious food for me.命题点2 概数词与分数.基础知识 考向一、概数词 1.表示确切的数字(具体数字+概数词+名词复数)：hundred，thousand，million 等词与具体的数字one，two.或 several，some，many等词连用时，要用单数形式。例：five hundred people 五百人；two thousand books 两千本书2.表示不确切的数字(概数词加-s+o
8、f+名词复数)：hundred，thousand，million等词与of 连用时，要用复数形式，且前面不能再加数字。例：thousands of factories 成千上万家工厂 考向二、分数 1.分数的构成：分子基数词，分母序数词，分子大于1，分母加-s。例：2/3 two thirds；5/9 five ninths；2.“分数+of+名词”作主语，谓语动词的单复数应由名词的单复数来定。例：Two fifths of the work has been finished.五分之二的工作已完成。（谓语动词与work保持一致）Dad, about three fourths of our
9、classmates wear glasses.爸爸，我们班大约四分之三的同学戴眼镜。（谓语动词与 classmates保持一致）.练习题10.Karl Marx, a great thinker and politician, was born in Germany two (hundred) years ago. 11.Nowadays, (million) of farmers leave their hometowns to search for work in the cities.12.There are about (thousand) of students in our sc
10、hool.13. According to a survey, four out of five women do housework at home, but only two (five) of men would do it.14.Its said that two thirds of the water all over the world (be) polluted, so we must take action to protect the environment.专题四 数 词1.In his (eighty), I. M. Pei (贝聿铭) designed Suzhou M
11、useum for his hometown.2.The Yangtze River is the (three) longest river on the earth.3.He seems to have a (six) sense for knowing that his brother will win. 4.We cant count the stars clearly because there are (billion) of stars in the sky.5.The (one) step to making friends is associating with people
12、. You can go to public places to meet new people.6.World Book Day was set up in 1995, and the (twenty-four) World Book Day is on April 23, 2019.7.There are sixty students in our class. And two (three) of us are boys.8.All the family members are busy getting ready for my fathers (forty) birthday part
13、y.9.You can find more information about outer space in the (eight) unit of Smart Science.10.John is the (two) person to ask me the same question. The first one is my desk-mate.11.The (ten) day of September is Teachers Day. It is a day to show thanks to our teachers.12.Staying in a hotel for a day costs (two) as much as renting in the country for a week.13.May 4th, 2019 was the (hundred) anniversary of the May Fourth Movement.学科网（北京）股份有限公司