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birthday? My birthday is in October. 4 nineninth 整十的序數(shù)詞把 y 變成 i 加 eth ? 1 twentytwentieth ? 2 thirtythirtieth ? 3 fortyfortieth ? 4 fifty fiftieth ? 5 你能寫出 sixty seventy eighty niy 的序數(shù)詞嗎? 幾十幾的序數(shù)詞,十位數(shù)不變,個(gè)位數(shù)變成序數(shù)詞 ? 1. twentyone 21twentyfirst 21st ? 32thirtysecond 32nd ? 99niyninth 99th ? 4 .請(qǐng)寫出 66 83 48 55 的序數(shù)詞。 1 one first 2 twosecond 3 threethird 4 其余的序數(shù)詞是由基數(shù)詞后加 th 變化而來。) 2). Pair work. A: When is your birthday? B: My birthday is in?? . let’ s talk 部分 隨堂練習(xí) 一、寫出下列單詞的中文意思。 ( ) 25th ( ) 1st ( ) 1st ( ) 10th twelfth second ninth fourth first fifth A. National Day B. Christmas Day C. Children’s Day D. Army Day E. Teacher’s Day ( ) 1st