序数词的用法 (1)序数词主要用作定语.前面要加定冠词.例如: The first truck is carrying a foot baskets． John lives on the fifteenth floor． (2)序数词有时前面可加不定冠词来表示“再一 .“又一 这样的意思.例如: We'll have to do it a second time． Shall I ask him a third time? When I sat down.a fourth man rose to speak． (3)由几个序数词和基数词在拼写时不对应.很容易写错.应特别注意.它们是:one---first, two---second, three---third, five---fifth, eight---eighth, nine---ninth, twelve---twelfth. (4)表示年.月.日时. 年用基数词表示.日用序数词表示.例如: 1949年十月一日读作: October (the) first, nineteen sixty 2004年九月十日读作:September (the) tenth, two thousand and four (5)表示分数时.分子用基数词表示.分母用序数词表示.分子大于1时.分母加-s.例如: three fourths, one second, two fifths (6)序数词有时用缩写形式: first→1st second→2nd third→3rd fourth→4th twenty-second→22nd [实例解析] 【
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