one一1two二2three三3four四4five五5six六6seven七7eight八8nine九9基数词序数词first第一second第二third第三fourth第四fifth第五sixth第六seventh第七eighth第八ninth第九基数词和序数词比较one—firsteleven—eleventhtwo—secondtwelve—twelfththree—thirdthirteen—thirteenthfour—fourthfourteen—fourteenthfive—fifthfifteen—fifteenthsix—sixthsixteen—sixteenthseven—seventhseventeen—seventeentheight—eightheighteen—eighteenthnine—een—eenth基数词和序数词比较one—firsteleven—eleventhtwo—secondtwelve—twelfththree—thirdthirteen—thirteenthfour—forthfourteen—fourteenthfive—fifthfifteen—fifteenthsix—sixthsixteen—sixteenthseven—seventhseventeen—seventeentheight—eightheighteen—eighteenthnine—een—eenth整十变为序数词的情况ten—tenthtwenty—twentieththirty—thirtiethforty—fortiethfifty—fiftiethsixty—sixtiethseventy—seventietheighty—y—ieth基数词变序数词的构成规则基数词变序数词,一般后加th,一,二,三,要死记,八加h九去e,五和十二变ve,变为f加th,整十变y为ie,然后再加th。
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