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数词复习课件前言：本课件旨在帮助学生复习数词的基本知识，并提供一些练习题来帮助巩固所学内容。
以下是本课件的内容概要。
一、基本数词（Cardinal Numbers）1.1 0-10的基本数词0: zero1: one2: two3: three4: four5: five6: six7: seven8: eight9: nine10: ten1.2 11-20的基本数词11: eleven13: thirteen14: fourteen15: fifteen16: sixteen17: seventeen18: eighteen19: nineteen20: twenty1.3 21-100的基本数词21: twenty-one22: twenty-two......（继续列举至99）100: one hundred二、序数词（Ordinal Numbers）2.1 1-10的序数词1st: first2nd: second3rd: third5th: fifth6th: sixth7th: seventh8th: eighth9th: ninth10th: tenth2.2 11-20的序数词11th: eleventh12th: twelfth.......（继续列举至19th） 20th: twentieth2.3 21-100的序数词21st: twenty-first22nd: twenty-second......（继续列举至99th） 100th: one hundredth三、基数词和序数词的转换3.1 规则转换基数词+th = 对应的序数词1: one → 1st: first2: two → 2nd: second......（依次类推）3.2 非规则转换基数词需要进行部分或全部改变3: three → 3rd: third5: five → 5th: fifth......（列举一些非规则转换的例子）四、常用表达4.1 年龄I am twenty years old.She is the youngest in the family.4.2 日期Today is the 15th of May.Their anniversary is on the 3rd of June.4.3 顺序He finished the race in second place.The book is on the fourth shelf.4.4 分数Two-thirds of the students passed the test.She scored 90 out of 100 in the exam.五、练习题以下是一些练习题，帮助学生巩固所学内容。
2024年中考复习英语语法课件——数词（24张PPT）(共24张PPT)语法精讲数词数词表示数目多少或顺序先后的词叫做数词。
数词分为两大类：基数词和序数词考点1 基数词1. 基数词的基本用法用作基数词单位的hundred, thousand, million, billion 通常不带复数词尾-s，但若用于表示数百、数千、数百万这样的泛指，则用复数。
About two thousand people died in the earthquake.大约有两千人在地震中丧生。
Thousands of people go to the seaside every year. 每年成千上万的人到海滨去。
2. 表示整十的基数词的用法表示整十的基数词用复数形式可以表示人的大概岁数或某个年代。
年龄：in one ’s+基数词的复数年代：in the +基数词的复数或所有格He is in his early twenties. 他的年纪在二十出头。
This story took place in the 1930s. 故事发生在20世纪30年代。
3.dozen 和score 的用法与hundred，thousand等词基本相似。
例如：a dozen pencil一打铅笔several dozen pencils 几打铅笔three score eggs 60个鸡蛋dozen of times 许多次scores of visitors 大批游客考点2 序数词1. 序数词的构成大多数的序数词是由基数词加-th构成，如：seven—seventh, ten—tenth以-t结尾的基数词只在词尾加-h，如：eight—eighth以-ve结尾的基数词改-ve为f再加-th，如：five—fifth, twelve—twelfth 以-y结尾的基数词改-y为-ie再加-th，如：twenty—twentieth, thirty—thirtieth几十几的序数词只在个位数体现，如：twenty-one—twenty-first,thirty-three—thirty-third特殊的序数词：one—first, two—second, three—third, nine—ninth2. 不定冠词a与序数词连用序数词前加冠词a表示“再一次”。
