资源简介 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: twelve13-19: 以teen结尾,13、15、18特殊。thirteen; fourteen; fifteen; sixteen: seventeen; eighteen; nineteen20-90: 整十数以ty结尾,20、40、50、80特殊。twenty; thirty ; forty; fifty; sixty; seventy; eighty; ninety21-91: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 thousand5600 five thousand six hundred3537 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→eighthnine→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-two2. -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"在这个教室里有26个学生",提示词"26"表示学生的数量。所以要用基数词twenty-six2. the twenty-eighth此题关键词是floor,住在第几楼,要用序数词,twenty-eighth的序数词是twenty-eighth,且序数词前面一定要加冠词the3. twelfth此题的句意是”今天是Tom的第十二个生日",twelve的序数词是twelfth.注意:当序数词前有名词所有格时,不加the二、1.B divided by的意思是除以,所以答案是B2.C此题的句意是"三乘以6,再加上2等于几 运算可得,答案是C.三、1. third句意:这是我的第三本书,表示顺序,要用序数词。2. second表示顺序,要用序数词。3. fifth表示顺序,要用序数词。4. twenty此题的句意是"在我们的教室里有20个学生","20"表示学生的数量。所以要用基数词twenty5. one hundredth表示顺序,要用序数词。四、one ;second;fifth;fifth;seven 展开更多...... 收起↑ 资源预览