序数词-PPT课件.ppt

序数词（1-19）,李妙君,福州金桥学校,而表示次序的数词叫序数词，是由基数词变化而来的。,英语中，表示数目和顺序的词叫做数词。数词又分基数词和序数词，基数词表示数量，就是我们学过的one, two, three, four等这些表示数字的词。,one-first two-second three-third four-fourth five-fifth six-sixth,seven-seventh eight-eighth nine-ninth ten-tenth eleven-eleventh twelve-twelfth,数字1到12的序数词，我们来找找规律吧。,1 one -first 2 two-second 3 three-third 4 其余的序数词是由基数词后加-th 变化而来。,几个特殊变化的序数词,five-fifth twelve-twelfth eight-eighth nine-ninth,one-first four-fourth five-fifth,3:,:,i,13-19的序数词直接在词语末尾加上th,thirteen-thirteenth fourteen-fourteenth fifteen-fifteenth,你能写出 sixteen seventeen eighteen nineteen 的序数词吗？,你对了吗？,1. sixteen-sixteenth 2. seventeen-seventeenth 3.eighteen-eighteenth 4.nineteen-nineteenth,序数词的缩写,first 1st , second 2nd, third 3rd fourth 4th, fifth 5th, thirteenth 13th， fifteenth 15th,序数词相对应的数字+单词的最后两个字母,基变序，有规律,其余的th加后边，(fourth,sixth),一、二、三，都要变(first, second, third),八去 t，九去 e (eighth,ninth),字母f代ve (fifth,twelfth),Summary:,1-19的序数词变化规律：,牢牢记住莫忘记,