四 数词公开课教学课件.ppt

1、中考专题考点中考专题考点数词数词表示数量的多少表示数量的多少考点考点1 基数词基数词数字数字基数词形式基数词形式例词例词012各自独立各自独立zero 0; one 1; nine 9; twelve 12131939+重读重读teen结尾结尾特殊特殊: thirteen 13; fifteen 15; eighteen 18 数字数字基数词形式基数词形式例词例词2090整十位整十位数数以以ty结尾结尾twenty 20; thirty 30; forty 40; fifty 50; sixty 60; seventy 70; eighty 80; ninety 90两位数两位数(几十几几十几

2、)整十位数整十位数-个个位数位数twenty-one 21; thirty-five 35; ninety-eight 98三位数三位数(几百几几百几). . . hundredand+两位数两位数seven hundred and eighty-five 785; two hundred and ten 210基数词变化巧记法基数词变化巧记法： 1至至12另外记，另外记，13至至19 teen加起加起 20至至90整几十，整几十，ty结尾要及时结尾要及时forty去掉字母去掉字母u,thirty fifty更出奇更出奇 若是遇到几十几，连字符不能忘若是遇到几十几，连字符不能忘 三位数几百几，

3、三位数几百几，hundred后把后把and立立基数词的读法基数词的读法:简记：简记：“右开头右开头 三位数三位数 逗隔开逗隔开 tmb加加进来进来” thousand(千千), million(百万百万), billion(十亿十亿)142，356，870 76, 832, 154, 968(2016青海模考青海模考)Three hundred thousand one hundred and seventy means_A3,170 B3,117 C300,170 D30,170(2015青海模考青海模考)2,418,000,000读作读作_CTwo billion,four hundred

4、 and eighteen million hundreds of成百上千成百上千 thousands of成千上万成千上万 millions of数以百万数以百万若前面有具体数字或若前面有具体数字或several, many等词时等词时,其后不加其后不加s，也不与也不与of连用；但若用于表示连用；但若用于表示“数百、数千、数百万数百、数千、数百万”这样的泛指概念时，后面则加这样的泛指概念时，后面则加s，并与，并与of连用。连用。简记简记有数字去有数字去s丢丢of，无数字加，无数字加s捡捡of (2014青海青海)The government of Qinghai is building_ch

5、eap and good houses for the peopleA thousand B thousands of Cthousand of(2014青海青海完形完形)Its reported that there are more than 300_smokers in China,nearly a third of all the smokers in the worldA million B millions C million of D millions ofBA表示年龄表示年龄: 1.基数词基数词+years old .岁岁 Bill is 11 years old. 2.at

6、the age of +基数词基数词 在在.岁时岁时 I can swim at the age of seven.考点考点2 序数词序数词数字数字序数词变化规则序数词变化规则例词例词1、2、3不规则变化不规则变化first第一第一; second第二第二; third第三第三419基数词词尾加基数词词尾加th特殊特殊: fifth第五第五; eighth第八第八; ninth第九第九; twelfth第十二第十二 数字数字序数词变化规则序数词变化规则例词例词2090ty变为变为tie再加再加thtwentytwentieth第二十第二十ninetyninetieth第九十第九十两位数两位数只

7、变个位数只变个位数twenty-third第二十三第二十三; 【巧学妙记】【巧学妙记】：基变序很容易，邀请基变序很容易，邀请th来帮助来帮助1 2 3特殊记，特殊记， 8去去t,9去去eve要用要用f替，替，five和和twelve是两兄弟是两兄弟以以y结尾改结尾改ie， 再加再加th也不迟也不迟若是遇到几十几，只变个位就可以若是遇到几十几，只变个位就可以 eight_ nine_twelve_forty_ twenty-one_ eighthninthtwelfthfortiethtwenty-first 【考点聚焦【考点聚焦】 序数词前通常要加定冠词序数词前通常要加定冠词the Mothe

8、r was my first teacher in my life. 不加不加the 的情况的情况 前有形容词性物主代词或名词所有格修饰时前有形容词性物主代词或名词所有格修饰时 Lilys third trip his second wife 序数词前面用序数词前面用a/an, 表示表示“再一、又一再一、又一” I want to try a third time.【中考体验【中考体验】 July 1st of this year is the _ birthday of the CPC(中国共中国共产党产党). A. ninety-five B. ninetieth-fifthC. nine

9、tieth-five D. ninety-fifthHe has failed_times, but he wont give up a_chance. A. third; four B. three; fourth C. third; fourthDB【知识链接【知识链接】表示顺序类的名词表示顺序类的名词, 应该把基数词放在其应该把基数词放在其后后; 如果放在其前如果放在其前, 应该用应该用the加序数词。简记加序数词。简记【序名基】【序名基】例如例如: Class Three=the third class三班三班Room Seven=the seventh room七号房间七号房间分数的

10、表示法：分数的表示法：巧记【分子基，分母序，分子大于巧记【分子基，分母序，分子大于1，分母加，分母加S】3/5 _ 1/3 _1/4 _3/4 _考点：考点：当分数作主语时当分数作主语时,谓语动词的单复数由谓语动词的单复数由of后面名词的后面名词的单复数决定单复数决定three fifthsone thirdone fourth/a quarterthree quarters/three fourths【中考体验【中考体验】(2015黄冈中考黄冈中考)_of the land in that district_ covered with trees and grass. A. Fifth twoisB. Two fifths areC. Fifth second are D. Two fifths is总结总结(2021青海中考青海中考)本课给自己打分本课给自己打分_A.one hundredB. fortyC. twentyD.Believe yourselves,youre the best one.homework：