序數(shù)詞的構(gòu)成

①序數(shù)詞多數(shù)由"基數(shù)詞-th"構(gòu)成，序數(shù)詞前一般加定冠詞the

②少數(shù)序數(shù)詞構(gòu)成屬特殊情況

e.g. One-first two-second three-third five-fifth eight-eighth nine-ninth twelve-twelfth

③以y結(jié)尾的十位整數(shù)，先將y改為i，再加-eth e.g. thirty-thirtieth

④21以上的多位數(shù)，要將末位數(shù)改為序數(shù)詞，前面其他位數(shù)仍用基數(shù)詞

e.g. eighty-three-eighty-third nine hundred and sixty-two-nine hundred and sixty-second

⑤序數(shù)詞的縮寫形式由阿拉伯?dāng)?shù)字加序數(shù)詞的后兩個字母構(gòu)成

e.g. first-1st second-2nd

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