基数词变序数词

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1、1stfirst2ndsecond3rdthird4thfourth5thfifth6thsixth7thseventh8theighth9thninth10thtenth11theleventh12thtwelfth13ththirteenth14thfourteenth15thfifteenth16thsixteenth17thseventeenth18theighteenth19thnineteenth20thtwentieth21sttwenty-first22ndtwenty-second23rdtwenty-th

2、ird24thtwenty-fourth25thtwenty-fifth26thtwenty-sixth27thtwenty-seventh28thtwenty-eighth29thtwenty-ninth30ththirtieth31stthirty-firstLearnthesenumbersandfindouttherules: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

3、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=Lesso

4、nOnethesixthgrade=GradeSix下一页上一页1stfirst2ndsecond3rdthird5thfifth8theighth12thtwelfth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。9thninth下一页上一页Thefirstmonthoftheyearissecondthirdfourthfifthsixtheleventhseventheighthninthtentht

5、welfthFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberJanuary.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March12thAugust8thJanuary5thJuly20thDecember1stSeptember9thApril3thNovember2ndFebr

6、uary14thMay30thJune23rdOctober21st下一页上一页Readthedates:Writing(写法）Reading（读法）January1stMarch8thAugust2ndSeptember10thJuly3rdFebruary12thOctober20thDecember25thJanuary(the)firstMarch(the)eighthAugust(the)secondSeptember(the)tenthJuly(the)thirdFebruary(the)twelfth下一页Oc

7、tober(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：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=thefifthlesson3.表示分数时，基数词作分子，序数词作分母，当分子

8、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anartfestivalabasketballgame上一页下一页anEnglishpartyamusicfesti