摘要：考查基数词转换成序数词 基数词变为序数词时,一般情况下在基数词之后加-th.例如:four → fourth 但是.特殊的基数词变为序数词可用以下口诀来帮助记忆:一.二.三单独记.八去t,九去e,五和十二记仔细.f来把ve替.ty变成 tie.后面再加th.即:one→first,two→second,three→third,eight →eighth,nine→ninth,five→fifth,twelve→twelfth,twenty→ twentieth,thirty→thirtieth,forty→fortieth,fifty→ fiftieth,sixty→sixtieth,seventy→seventieth,eighty →eightieth,ninety→ninetieth等. 考例1:[2005年镇江市] The lesson is not so easy as the ninth lesson, I think. 分析:所给的词eight为基数词,根据习惯表达“第八课 应用序数词.eight的序数词为 eighth,即应填eighth. 考例2:[2005年扬州市]We will have the celebration for the return of Hong Kong. 分析:(略)应填ninth. 考例3:[2005年泰州市]The students from America live on the floor. 分析:(略)应填ninth. 考例4:[2005年徐州市]Liu Xiang got the (one) in his competition of the 2004Olympic Games. 分析:(略)应填first.

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