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专题四数词 数字基数词形式例词1319 13，15，18是特殊形式，14，16，17，19是在个位数形式后添加后缀teen构成特殊：thirteen 13; fifteen 15; eighteen 18一般：fourteen 14；sixteen 162090整十位数20，30，40，50，80是特殊形式，60，70，90是其个位数形式添加后缀ty构成twenty 20; thirty 30; forty 40; fifty 50; sixty 60; seventy 70; eighty 80; ninety 90两位数(几十几)整十位数个位数twentyone 21; thirtyfive 35; ninetyeight 98 数字基数词形式例词百位数(几百几)整百：19基数词形式加hundred几百几：. . . hundred and两位数seven hundred and eightyfive 785; two hundred and one 201千位数以上从右向左数起，每三位数加一个逗号，依次为thousand(千)，million(百万)，billion(十亿) 76, 832, 154, 968 seventysix billion eight hundred and thirtytwo million one hundred and fiftyfour thousand nine hundred and sixtyeight 数字序数词变化规则例词1、2、3不规则变化first第一；second第二；third第三419 5，8，9，12是特殊形式，其他序数词是由对应的基数词后添加th特殊：fifth第五；eighth第八；ninth第九；twelfth第十二一般：fourth第四；nineteenth第十九 数字序数词变化规则例词20、3090由对应基数词变结尾字母y为i，再加eth twentytwentieth第二十ninetyninetieth第九十2199之间的非整十数只把个位数变成序数词，十位数不变twentythird第二十三；fiftysixth第五十六第一百以上的多位序数词由基数词的形式变结尾部分为序数词形式one hundred and twentyfirst 第一百二十一；one thousand, three hundred and twentieth 第一千三百二十 专题训练 数词(训 练 时 间 ： 30分 钟 分 值 ： 25分 ) 1. December is _ and last month of the year. A. the twelfth B. twelfth C. the twelve【解析】表示第十二个月应用序数词，即the twelfth。故选A。【答案】A 2. (2016济南)How many hours do you sleep every night? About _ hours. From 9：00p. m. to 6：00 a. m. A. nine B. nineteen C. ninth D. ninety【解析】由“晚上9点到凌晨6点。”可知，大约9个小时。故选A。【答案】A 3. Christmas Day is on _ of December. A. twentyfive B. the twentyfive C. twentyfifth D. the twentyfifth【解析】表示日期要用序数词，且序数词前加the。故选D。【答案】D 4. (2016广东)Please turn to page _ and take a look at the picture on it. A. the eightieth B. eightieth C. eighties D. eighty【解析】“page基数词”是固定用法。故选D。【答案】D 5. To finish the task, weve tried three times, and after dinner well try_ time. A. the fourth B. a fourth C. fourth D. four【解析】根据前面的three times可知要试第四次，序数词和不定冠词连用表示“又一；再一”。故选B。【答案】B 6. (2016兰州)_ of the students in Class 6 have lunch at school. A. Two fifth B. One thirds C. Threes fifth D. Three quarters【解析】考查分数的表达。分数由基数词和序数词构成，分子用基数词，分母用序数词，当分子(基数词)大于1时，分母(序数词)应加s；“四分之一”可用quarter代替。故选D。【答案】D 7. Tonys mum looks young and beautiful. Its hard to imagine she is already in her _. A. fifties B. fifty C. fiftieths D. fiftieth【解析】“in ones基数词复数”是固定搭配，意为“在某人岁时”。故选A。【答案】A 8. (2016东营)A recent survey shows that 35 out of 45 students in my class will save their phones first in a fire. About _ of the students made such a choice? Life is far more important, isnt it？ 【导学号35490062】 A. half B. one third C. two thirds D. three quarters【解析】由“我们班一共45人，其中35人”可知选D。【答案】D 9. (2016重庆A)Meimei is going to be an older sister. Her parents are planning to have their _ child. A. one B. Two C. first D. second【解析】由“梅梅就要当姐姐了，她父母计划再要一个孩子。”可知选D。【答案】D 10. We are going on holiday in the _week of July. A. two B. twice C. second 【解析】句意为“我们打算在七月的第二个周去度假。”故用序数词second。故选C。【答案】C 11. (2016龙东)About _ of the land _ covered with trees and grass. A. three fifths; is B. three fifths; are C. three fifth; are 【解析】考查分数的用法。分子用基数词，分母用序数词，分子超过1时，分母要用复数。分数做主语时，谓语动词的数要与分数后面的名词保持一致。故选A。【答案】A 12. The number of the cars in our neighborhood is about eight_， and_ of them are new cars. A. hundred; two thirds B. hundred; two third C. hundreds; two thirds D. hundreds; two third【解析】当hundred前有具体数字时，不能加s；表达分数时，分子用基数词，分母用序数词，当分子大于1时，分母用复数。故选A。【答案】A 13. I live in Room 403. Sam lives in the room right above mine, on the _ floor. A. third B. three C. fifth D. five【解析】句意为“我住在403房间。Sam住在我的正上方，在五楼。”表示“第五楼”用序数词fifth。故选C。【答案】C 14. (2016丹东) Have you heard of TFBOYS? Certainly. About _ teenagers love them very much in our school. A. hundreds B. two hundreds of C. two hundreds D. two hundred【解析】当hundred前面有具体的数字时，不加s, 后面也不接of，two是具体数字。故选D。【答案】D 15. (2016郴州)The workers will complete the new bridge in _. A. two and a half months B. two months and half C. two and a half month【解析】“two and a half名词复数”是固定用法。故选A。【答案】A 16. Well be back for our schools_ anniversary ceremony. I see. That means youll have a gettogether with your classmates in_ years. A. fifteen; seven B. fifteenth; seven C. fifteen; seventh D. fifteenth; seventh【解析】“15周年校庆”用schools fifteenth anniversary ceremony表示；“在7年之后”用in seven years表示。故选B。【答案】B 17. (2016重庆B)The environment here becomes better and better. _ birds are coming back. A. Thousands of B. Thousand of C. Thousands D. Thousand【解析】thousand表示不确切的数字时应用复数形式，且与of连用。故选A。【答案】A 18. (2016温州)Welcome to Los Angeles. Have you ever been here? Sure. I visited this city three years ago so this is my _ time here. A. first B. second C. third D. fourth【解析】first“第一”；second“第二”；third“第三”；fourth“第四”。由上文文意“我三年前游览过这座城市”可推知，“这是我第二次来这里”。故选B。【答案】B 19. Helen loves reading. She has read _ books this month. A. five B. fifth C. five of D. fifth of【解析】考查数词的用法。第二句意为“她本月读了五本书。”此处要用基数词five来修饰books。【答案】A 20. The_ Brazils Olympic games will be held on August 5. _exciting news for the long summer vacation! A. thirtyone; How a B. thirtyfirst; What C. thirtyfirst; What an D. thirtyone; How【解析】考查数词和感叹句的用法。由“第三十一届巴西奥运会将在8月5日举行。”可知应排除A和D；句中news是不可数名词，感叹句的基本句式是：What形容词名词主语谓语其他！故选B。【答案】B 21. (2016恩施)Nowadays, _ of the old people in the area _ used to dancing on the square after supper. A. two third; is B. two thirds; is C. two thirds; are【解析】考查分数的表达和主谓一致。分子用基数词，分母用序数词，分子超过1时，分母要用复数。分数做主语时，谓语动词的数要与分数后面的名词保持一致。故选C。【答案】C 22. Mum, _ of the apples _ gone bad. Wed better eat up the rest as soon as possible. A. one third; have B. one thirds; have C. one third; has D. first three; has【解析】考查分数的表达和主谓一致。表示“三分之一”要用one third，可先排除B和D。“分数of名词”结构作主语时，谓语动词和of后的名词保持一致，根据题干中的the apples可知，第二个空谓语动词用have。故选A。【答案】A 23. (2016邵阳)There are _ students in our school. A. hundreds B. hundreds of C. hundred of【解析】hundred表示不确切的数字时应用复数形式，且与of连用。故选B。【答案】B 24. Come on, baby. We have already done _ of the work. A. twothree B. twothird C. twothirds D. secondthree【解析】分子用基数词，分母用序数词，当分子大于1时，分母要用复数。故选C。【答案】C 25. (2016泰安)Mum, the beautiful card I made last night is just for your _ birthday. Oh, thank you, my dear! A. forty B. fourteen C. fortieth D. fourth【解析】句意为“妈妈，昨天晚上我制作的漂亮贺卡是送给你第四十个生日的礼物。”故选C。【答案】C
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