数词（讲义）-2023-2024学年牛津沪教版英语六年级下册

数 词 数词可分为: 1. 基数词; 2. 序数词。 数词是用来表示事物的数目或顺序的词，表示“多少”的词叫做基数词; 表示“第几”的词叫做序数词。 一、基数词 1. one, two, three, four, five, six, seven, eight, nine, ten; eleven; twelve; thirteen; fourteen; fifteen; sixteen; seventeen; eighteen; nineteen; twenty. 11-12 用心记，13-19-teen结尾，20-90-ty结尾。 2. 表示“几十几”(21-99)的基数词是由十位数和个位数之间加连字号“-”构成。 如: 26: twenty-six 3. 表示“几百几”(101-999)，先说“几百”后加“and”再加“末两位数”或“末位数”。其中的“百”用单数形式。如: 102: one hundred and two 284:two hundred and eighty-four 1284: one thousand two hundred and eighty-four.(“千”和“百”之间不加“and”) 4. 房间号码和电话号码要一个数字一个数字地读。 二、序数词 1. 序数词的构成 (1)一般在相应的基数词后加词尾-th，注意下列单词的特殊变化: one→first; two→second; three →third nine→ninth; ten→tenth; twelve→twelfth; nineteen→nineteenth (2)以-ty结尾的基数词变序数词时，将y改为i，再加eth。 如: twenty→twentieth;thirty→thirtieth (3)表示“几十几”或“几百几”的基数词变序数词时，只要将个位数变为序数 词，十位数或百位数不变。如: twenty-one→twenty-first (4)序数词的缩略式，由阿拉伯数字加上序数词最后两个字母构成。 如: first-1st; second-2nd; third -3rd; fourth-4th; twelfth-12th; twenty-first-21st 2. 序数词的用法 (1)序数词前要加定冠词the， 在句中作定语，放在被修饰的名词前。 (2)给东西编号时，序号在名计司前用序数词，序号在名词后用基数词。 三、年份、日期、时刻的读法 1. 年份:四位数通常分两组来读。 如: 1998读nineteen ninety-eight 但是2000-2099年不断开读。 如: 2008 读two thousand and eight. 2. 日期、世纪用序数词表示。 如: May 2nd Sept 6th 3. 时刻有两种读法: 一是直接读数字，先说钟点数，后说分钟数。这种读法英语叫做顺读法。 二是先说分钟数，后说钟点数。用介词past表示几点过几分(不超过半小时)或用to表示几点差几分(超过半小时还差多少分钟到下一个钟点)。这种读法英语叫做倒读法。 整点 如: 4:00 four o'clock 半点 如: 4:30 half past four /four thirty 不过半点 如: 2:05 five past two 超过半点 如: 3:45 a quarter to four 基数词 序数词 基数词 序数词 l one 1st first 15 fifteen 15th fifteenth 2 two 2nd second 16 sixteen 16th sixteenth 3 three 3rd third 17 seventeen 17th seventeen 4 four 4th fourth 18 eighteen 18th eighteenth 5 five 5th fifth 19 nineteen 19th nineteenth 6 six 6th sixth 20 twenty 20th twentieth 7 seven 7th seventh 21 twenty-one 21st twenty-first 8 eight 8th eight 22 twenty-two 22nd twenty-second 9 nine 9th ninth 23 twenty-three 23rd twenty-third 10 ten 10th tenth 30 thirty 30th thirtieth 11 eleven 11th eleventh 40 forty 40th fortieth 12 twelve 12th twelfth 50 fifty 50th fiftieth 13 thirteen 13th thirteenth 60 sixty 60th sixtieth 14 fourteen 14th fourteenth 70 seventy 70th seventieth 80 eighty 80th eightieth 100 a/one hundred 100th hundredth 90 ninety 90th ninetieth 1000 a/one thousand 1000th thousandth Practice:(练习) I. 用基数词和序数词填空。(用英文写。) 1. Today is August (12). Next month is my (5) birthday. 2. Where do you live? I live on the (9) floor. 3. How about you? I live on the (20) floor. So I often take a lift to go home. 4. When’s your birthday? It’s on December (15). 5. What time is it? It’s (12:20). 6. How much is this coat? It is (112) yuan. 7. How many watches are there? There are (22) watches. 8. New year day is the (1) day of the year. 9. T is the (6) letter in the word Christmas. 10. (23) and (33) is (56) 11.You are the (1) and I am the (2). 12. But Tom is the (3) and his brother is (11). 13. The train leaves at (8:30). 14. This is the (40) medals. We are all happy. 15. There are (14) floors in the building. 16. When do you get up? I get up at (6:15) 17. Where do you live? I live in Flat (614). 18. How many months are there in a year? There are (12) months. 19. You didn’t win. You were in (5) place. 20. This book is (78) dollars. 21. My birthday is on May (15). 22. They won (44) medals at the Sports Day. 23. What's the time? It's (4:36). 24. When do you go to bed? I go to bed at (11:45). 25. How often does he brush his teeth? He brushes his teeth (2) a day. 1 学科网（北京）股份有限公司 $$