PEP英语五年级下册序数词专练.ppt

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1、英语序数词记忆【歌诀】摘要幻灯片英语序数词记忆歌诀一二三，特别记八减t，九去e，f要将ve替y变为ie，然后再加-th“几十几”要注意    个位序数就可以英语序数词记忆歌诀一二三，特别记，其余后加-th。八减t，九去e，f要将ve替。y变为ie，然后再加-th“几十几”要注意个位序数就可以。一二三，特别记注：first、second、third无规律，需要特别记。first(1st)第一second(2nd)第二third(3rd)第三one→first，two→second，three→third八减t，九去e，eight的序数词

2、要去t再加-th，即eighth，读作［eiW］；nine要去e再加-th，即ninth；f要将ve替以ve结尾的基数词，如five，twelve，要把ve变为f再加-th，即fifth，twelfth；y变为ie，然后再加-th表示“几十”的基数词均以y结尾，变为序数词时，先将y变为ie，再加-th，如twentieth,ninetieth等；“几十几”要注意    个位序数就可以表示“几十几”的基数词变为序数词时，将个位数变为序数词，十位数不变。如：fifty-sixth第五十六［略加注意］另外，序数词缩写形式，由阿拉伯数字加序数

3、的最后两个字母构成。如：firstlst，eighth8th，twenty-second22nd还有，多位数的基数词变成序数词时，只需将末位数词变成序数词，前边的位数形式不变。如：twenty-onetwenty-first(21st)first(1st)第一second(2nd)第二third(3rd)第三fourth(4th)第四fifth(5th)第五sixth(6th)第六seventh(7th)第七eighth(8th)第八ninth(9th)第九tenth(10th)第十eleventh(11th)第十一twelfth(12

4、th)第十二thirteenth(13th)第十三fourteenth(14th)第十四fifteenth(15th)第十五sixteenth(16th)第十六seventeenth(17th)第十七eighteenth(18th)第十八nineteenth(19th)第十九twentieth(20th)第二十thirtieth(30th)第三十fortieth(40th)第四十fiftieth(50th)第五十sixtieth(60th)第六十seventieth(70th)第七十eightieth(80th)第八十ninetieth

5、(90th)第九十第90ninetieth第91ninety-first第92ninety-second第93ninety-third第94ninety-fourth第95ninety-fifth第96ninety-sixth第97ninety-seventh第98ninety-eighth第99ninety-ninthNumbersonetwothreefourfivesixseveneightninetenfirstsecondthirdfourthfifthsixthseventheighthninthtenthNumbersel

6、eventwelvethirteenfourteenfifteensixteenseventeeneighteennineteentwentytwelfthtwentiethththththththththtwenty-onetwenty-twotwenty-threetwenty-fourtwenty-fivethirtytwenty-firsttwenty-secondtwenty-thirdtwenty-fourthtwenty-fifththirtiethNumbers