2022年中考英语语法复习数词ppt课件.pptx

1、数词一、数词定义数词是表示数目多少和顺序先后的词，分为基数词和序数词两种。二、基数词的表达及用法(1)几十几的基数词的十位数与个位数之间要用连字符“-”连接。38:_(2)三位数的基数词须在百位和十位（若无十位则和个位）之间用and连接.149:_(3)当hundred,thousand,million,billion等词前有具体数词several修饰时，必须用_.表示约数的时候可hundreds/thousands/millions/billions of数词一、数词定义数词是表示数目多少和顺序先后的词，分为基数词和序数词两种。二、基数词的表达及用法(1)几十几的基数词的十位数与个位数之间要

2、用连字符“-”连接。38:_(2)三位数的基数词须在百位和十位（若无十位则和个位）之间用and连接.149:_(3)当hundred,thousand,million,billion等词前有具体数词several修饰时，必须用_.表示约数的时候可hundreds/thousands/millions/billions of数词thirty-eightone hundred and forty-nine单数数词序数词序数词构成方法构成方法1-3first(1st)第一；second(2nd)第二；third(3rd )第三4-19在相应的基数词后加-_构成，其中4个拼写有变化：5th-fifth

3、:;8th-eighth;9th-ninth;12th-twelfth整十位数整十位数（除ten)将词尾y_twentieth:thirtieth:fortieth:fiftieth;sixtieth;seventieth;eightieth;ninetieth21以上的多位数词只将未位数变为序数词，前面的其他位数仍用基数词：21st-twenty-first;33rd-thirty-third;56th:fifty-sixth;100th:one hundredth:2586th:twothousand five hundred and eighty-sixth数词序数词序数词构成方法构成方

4、法1-3first(1st)第一；second(2nd)第二；third(3rd )第三4-19在相应的基数词后加-_构成，其中4个拼写有变化：5th-fifth;8th-eighth;9th-ninth;12th-twelfth整十位数整十位数整十位数（除ten)将词尾y_twentieth:thirtieth:fortieth:fiftieth;sixtieth;seventieth;eightieth;ninetieth21以上的多以上的多位数词位数词只将未位数变为序数词，前面的其他位数仍用基数词：21st-twenty-first;33rd-thirty-third;56th:fift

5、y-sixth;100th:one hundredth:2586th:twothousand five hundred and eighty-sixthth改ie,+th三、序数词2.基数词变序数词的口诀一、二、三，特殊记 first,second,third八去t,九除e,ve要用f替，eighth,nineth,fifth,twelfth.见y变成_,词尾加上_ twentieth若是遇到几十几，只变_就可以 twenty-sixth数词三、序数词2.基数词变序数词的口诀一、二、三，特殊记 first,second,third八去t,九除e,ve要用f替，eighth,nineth,fif

6、th,twelfth.见y变成_,词尾加上_ twentieth若是遇到几十几，只变_就可以 twenty-sixth数词改ieth个位三、序数词3.序数词的用法序数词前一般要加定冠词_,如果序数词前用_时，则表示“又一”；“再一”A famous Chinese postar and actor Mr L set a second Guinness World in 2021.This is not the first time LuHan has entered the record books.数词三、序数词3.序数词的用法序数词前一般要加定冠词_,如果序数词前用_时，则表示“又一”；“

7、再一”A famous Chinese postar and actor Mr L set a second Guinness World in 2021.This is not the first time LuHan has entered the record books.数词thea/an四、分数、小数，百分数表达法1.分数表达法分数的分子用_,分母用_.如：one third三分之一。当分子大于1时，分母用序数词的_.如：two thirds 三分之二。当分母是2和4时，分别可以用_代替。口诀：_ Only one fifth of the students dont want to

8、 go to his concertFour fifths of the students like him.数词四、分数、小数，百分数表达法1.分数表达法分数的分子用_,分母用_.如：one third三分之一。当分子大于1时，分母用序数词的_.如：two thirds 三分之二。当分母是2和4时，分别可以用_代替。口诀：_ Only one fifth of the students dont want to go to his concertFour fifths of the students like him.数词基数词序数词复数half,quarter子基母序，分子大于1，分母加s

9、四、分数、小数，百分数表达法2.小数表达法小数点读作point,小数点前后的数用基数词表示。Ludo,the longest cat in the world,is 118.33 cm from head to tail.3.百分数表达法百分数用percent表示10percent of the students watched the film Miss Granny.数词四、分数、小数，百分数表达法4.分数、百分数与主谓一致70 percent of the earths surface _(be)covered by water.70 percent of the students in

10、 our class _(be)boys.分数、百分数的考查往往和主谓一致相联系。当分数、百分数修饰可数名词的复数时，谓语动词用_形式。当分数、百分数修饰不可数名词时，谓语动词用_形式.数词四、分数、小数，百分数表达法4.分数、百分数与主谓一致70 percent of the earths surface _(be)covered by water.70 percent of the students in our class _(be)boys.分数、百分数的考查往往和主谓一致相联系。当分数、百分数修饰可数名词的复数时，谓语动词用_形式。当分数、百分数修饰不可数名词时，谓语动词用_形式.数

11、词isare复数单数数词数词原级数词数词thanof课堂测验课堂测验课堂测验课堂测验课堂测验课堂测验五、时间日期表达法1.年月日表达法数词五、时间日期表达法1.年月日表达法数词基数词基数五、时间日期表达法1.年月日表达法数词五、时间日期表达法1.年月日表达法数词读出来五、时间日期表达法2.Bigtoe,2.3 metres tall,is a motorecle that once held the Guinness World Record in the category of Tallest Rideable Motorcycle.Tom Wiberg,from Sweden,built

12、it in the 1890s.20世纪70年代_数词五、时间日期表达法2.Bigtoe,2.3 metres tall,is a motorecle that once held the Guinness World Record in the category of Tallest Rideable Motorcycle.Tom Wiberg,from Sweden,built it in the 1890s.20世纪70年代_数词in the 1970s五、时间日期表达法3.年龄表达法数词五、时间日期表达法3.年龄表达法数词五、时间日期表达法3.年龄表达法数词teenstwentiesthirties课堂测验课堂测验课堂测验课堂测验