基数词变序数词

1st first 2nd second 3rd third 4th fourth 5th fifth 6th sixth 7th seventh 8th eighth 9th ninth 10th tenth 11th eleventh 12th twelfth 13th thirteenth 14th fourteenth 15th fifteenth 16th sixteenth 17th seventeenth 18th eighteenth 19th nineteenth 20th twentieth 21st twenty-first 22nd twenty-second 23rd twenty-third 24th twenty-fourth 25th twenty-fifth 26th twenty-sixth 27th twenty-seventh 28th twenty-eighth 29th twenty-ninth 30th thirtieth 31 st thirty-first Learn these numbers and find out the rules: 下一页上一页 表示顺序的数词叫序数词。 基数词变序数词的规则是：（1） 大部分数词在词尾加th ： 如: fourth（第四） thirteenth（第十三） hundredth（第一百）（2） 表示整十的基数词， 变 y为ie， 再加 eth; 如：twentieth 第二十 eightieth第八十（3） 特殊的序数词有: 第一 first, 第二 second， 第三 third， 第五 fifth, 第八 eighth, 第九 ninth ，第十二 twelfth 下一页上一页 (4) 要把一个“ 几十几” ， “ 几百几” 的基 数词变成序数词，只需把个位数变成序数词。 如: 32-thirty-second 256- two hundred and fifty-sixth(5) 在表示编号的东西时，可以用基数词表示， 也可用序数词表示 如: the first lesson = Lesson One the sixth grade = G rade Six 下一页上一页 1st first 2nd second3rd third 5th fifth8th eighth 12th twelfth基变序有规律，结尾字母是 th; 一、二、三，特殊记，结尾字母是 t, d, d；八去t, 九去e; f 要把ve替。ty 将 y 变成 i, th前面有个e；几十几，也好记，只变个位就可以。9th ninth 下一页上一页 The first month of the year issecondthirdfourthfifthsixtheleventhseventheighthninthtenthtwelfth FebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberJanuary. 下一页上一页 写出下列日期的英文表达法 1. 3 月12日 2. 8月8 日 3. 1月5日 4. 7月20 日 5. 12月1日 6. 9月9日 7. 4月3日 8. 11月2日 9. 2月14日 10. 5月30 日 11. 6月23日 12. 10月21日March 12th August 8thJanuary 5th July 20thDecember 1st September 9thApril 3th November 2ndFebruary 14th May 30thJune 23rd October 21st 下一页上一页 Read the dates:Writing(写法） Reading （读法）January 1stMarch 8thAugust 2ndSeptember 10thJuly 3rdFebruary 12thOctober 20thDecember 25th January (the) firstMarch (the) eighthAugust (the) secondSeptember (the) tenthJuly (the) thirdFebruary (the) twelfth 下一页October (the) twentiethDecember (the) twenty-fifth上一页 4. 序数词常用作名词的定语，但当名词前面已有物主代词等限定词时，则不能再用the。 如：The second boy likes playing baseball.序数词的用法：1. 序数词前一般要加定冠词the。 如：The first boy is my brother.2. 表示编号时，常把基数词放在名词后面来表示 顺序，相当于“the + 序数词 + 名词”。 如： lesson five = the fifth lesson3. 表示分数时，基数词作分子，序数词作分母， 当分子大于1时，分母要用复数。 如：1/4 one fourth; 2/5 two fifths上一页下一页 上一页下一页 an open day of school上一页下一页 an art festivala basketball game 上一页下一页 an English partya music festival 上一页下一页 party晚会，聚会Birthday party 生日晚会Christmas party 圣诞晚会 上一页下一页 speech contest演讲比赛English contest Chinese contest上一页下一页 school trip学校组织的观光、郊游 上一页下一页 a headmastera school calendarschool events 上一页下一页 A: Do you have a School day?B:Yes, we do.A:When is it?B:Its . A:Do you have an art festival?B: No, we dont. 上一页下一页 Joe: Sally.Can you help me fill in my calendar?Sally: Sure, Joe. Joe: When is your birthday party?Sally:My birthday party is October 5th. Joe: OK, and when is the basketball game?Sally: The basketball game? Oh, its October 2nd. Joe: Good. And , um, how about the school trip?Sally: The school trip is September 26th and 27th. Joe: And when is the speech contest?Sally: Oh, thats Friday, September 29 th. Joe: Great. 上一页下一页 H omework: