基数词变序数词

Unit8Whenisyourbirthday?,1stfirst2ndsecond3rdthird4thfourth5thfifth6thsixth7thseventh8theighth9thninth10thtenth,11theleventh12thtwelfth13ththirteenth14thfourteenth15thfifteenth16thsixteenth17thseventeenth18theighteenth19thnineteenth20thtwentieth,21sttwenty-first22ndtwenty-second23rdtwenty-third24thtwenty-fourth25thtwenty-fifth26thtwenty-sixth27thtwenty-seventh28thtwenty-eighth29thtwenty-ninth30ththirtieth31stthirty-first,Learnthesenumbersandfindouttherules:,下一页,上一页,基数词变序数词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-second256-twohundredandfifty-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:thefirstlesson=LessonOnethesixthgrade=GradeSix,下一页,上一页,1st,first,2nd,second,3rd,third,5th,fifth,8th,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,Thefirstmonthoftheyearis,second,third,fourth,fifth,sixth,eleventh,seventh,eighth,ninth,tenth,twelfth,February,March,April,May,June,July,August,September,October,November,December,January.,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,March12th,August8th,January5th,July20th,December1st,September9th,April3th,November2nd,February14th,May30th,June23rd,October21st,下一页,上一页,Readthedates:,January(the)first,March(the)eighth,August(the)second,September(the)tenth,July(the)third,February(the)twelfth,下一页,October(the)twentieth,December(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：Thesecondboylikesplayingbaseball.,序数词的用法：,1.序数词前一般要加定冠词the。如：Thefirstboyismybrother.,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：lessonfive=thefifthlesson,3.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：1/4onefourth;2/5twofifths,上一页,下一页,SchoolEvents,上一页,下一页,anopendayofschool,上一页,下一页,anartfestival,abasketballgame,上一页,下一页,anEnglishparty,amusicfestival,上一页,下一页,party,晚会，聚会,Birthdayparty生日晚会Christmasparty圣诞晚会,上一页,下一页,speechcontest,演讲比赛,EnglishcontestChinesecontest,上一页,下一页,schooltrip,学校组织的观光、郊游,上一页,下一页,aheadmaster,aschoolcalendar,schoolevents,上一页,下一页,Joe:Sally.Canyouhelpmefillinmycalendar?Sally:Sure,Joe.Joe:Whenisyourbirthdayparty?Sally:MybirthdaypartyisOctober5th.Joe:OK,andwhenisthebasketballgame?Sally:Thebasketballgame?Oh,itsOctober2nd.Joe:Good.And,um,howabouttheschooltrip?Sally:T