通用版小学英语小升初专题复习--基数词与序数词用法 知识梳理+专项练习（含答案）

基数词与序数词用法 知识梳理与专项练习 知识梳理 定义： 数词分为基数词和序数词。基数词：表示数目的多少，序数词：表示顺序的数词。 基数词： 1-12: 独立单词，单独记。 one: two; three: four: five: six: seven: eight: nine: ten: eleven: twelve 13-19: 以teen结尾，13、15、18特殊。 thirteen; fourteen; fifteen; sixteen: seventeen; eighteen; nineteen 20-90: 整十数以ty结尾，20、40、50、80特殊。 twenty; thirty ; forty; fifty; sixty; seventy; eighty; ninety 21-91：由十位数 加个位数 1-9构成，中间须有连字符“-” 例：23 twenty-three，46 forty -six. 百位数：1-9加hundred再加and再加十位数和个位数。 例：142 one hundred and forty-two , 305 three hundred and five. 千位数：1-9加thousand后面的百、十、个位数构成方法同前。 注意：hundred(百)，thousand(千)，million(百万)，billion(十亿)等前面即使有具体的数词，也不能在它们的后面加s. 例：200 two hundred，8百万 eight million. 1000 one thousand 2000 two thousand 5600 five thousand six hundred 3537 three thousand five hundred and thirty-seven 基数词的用法： 定语 例：Fifty thousand London dockers are out on strike. 主语:数词作主语，谓语动词用单数 例：Three weeks is quite a long time. 宾语或介词宾语 例：-How many do you want -Nine, please. 表语 例：Five plus six is eleven. 同位语 例：Is there room for us two 基数词+单数名词+形容词构成合成形容词 例：a three-year-old girly一个三岁的女孩; 序数词： 由基数词转变而来。 一般在基数词后加th 例：six-sixth，four-fourth，thirteen-thirteenth 不规则变化 one-first two-second three→third five-fifth eight→eighth nine→ninth twelve→twelfth 以y结尾的十位整数，变y为ie再加th 例：twenty→twentieth, forty→fortieth, ninety→ninetieth 从二十一后的"几十几“直至”几百几十几"或”几千几百几十几“只将个位的基数词变为序数词。 例：twenty-first, two hundred and forty-fifth 序数词有时用缩写形式 例：first--1st,twenty-second--22th 序数词用法： 作定语，前面一般要加定冠词(或物主代词) 例：Tom is their second son. 有时前面可以加一个不定冠词来表示"再一”，“又一"这样的意思 例：We'll have to do it a second time. First, second等有时可用来表示“第一个人(批)““第二个人“等 例：I will be the second to speak. 专项练习 一、用所给数字的正确形式填空，不可直接写阿拉伯数字! 1. There are _____ (26)students in the classroom. 2. My brother lives on_____ (28) floor. 3. Today is Tom's_____ (12) birthday. 二、单项选择。 1. Thirty-six divided by_____ is six. A. thirty B. six C. forty-two 2. -What is three times six plus two - It's _____. A. sixteen B. eighteen C. twenty 三、填空完成句子。 1. This is my_____ (three) book. 2. She finished the race in_____ (two) place. 3. The_____ (five) month of the year is May. 4. We have_____ (twenty) students in our class. 5. He was the_____ （one hundred) person to sign up for the event. 四、选择正确的词填空。 1. I have _____apple. （one, first) 2. She is the _____student to arrive.（two, second) 3．They celebrated their _____ wedding anniversary. (five， fifth) 4. The_____ day of the week is Friday. （five, fifth) 5. There are_____ days in a week.（seven, seventh) 答案 1. twenty- six 此题的句意是"在这 ... ...