数词专项练习ppt课件.ppt

,数词专项总结,数词分为基数词和序数词。基数词表示“多少”，序数词表示“第几”,序数词前一般带the.(1)这座楼房有三层，我们的教室在三楼。 This building has _ floors and our classroom is on the _ floor.(2) Today is my grandfathers _(81) birthday.(3)In the _ (18) century, a lot of musicisans came to study and work in Vienna.(4)Miss Liu was my _ (one) English teacher.,three,third,eighty-first,eighteenth,first,如何把基数词变为序数词？基变序，有规律，结尾加上th。一二三，特殊记，结尾字母t、d、d，八减t，九去e，f要把ve替，ty变y为ie，然后再加上th。要是遇上几十几，只变个位就可以。,six-sixth, seven-seventh,one-first, two-second, three-third,eight-eighth, nine-ninth,five-fifth, twelve-twelfth,twenty-twentieth, ninety-ninetieth,数词中考要点：1. hundred,thousand,million, billion用法与of连用时，用复数形式： millions of people前边有具体数字时，用单数形式： eight million people several million people2. “in +the+年代的复数形式”，表示世纪年代Eg: in the 1980s： 在20世纪80年代(区别in 1980)3. “in ones+整十的复数形式”，表示在某人岁上Eg: Peter taught himself English in his forties.,3. Class Ten Grade Nine结构： Module 1= the first module Lesson 3= the third lesson Room 9= the ninth room 4. 时刻的表达： （两种表达法） 直接读出法： 3:12 three twelve 加介词past或to法： 3:30 5:12 12:15 6:55 7:45,half past three 或者 three thirty,twelve past five 或者 five twelve,a quarter past twelve或者 twelve fifteen,f ive to seven或者 six fifty-five,a quarter to eight或者seven forty-five,29 -367 -6,582-73,234 -,twenty-nine,熟悉数字的表达方式:,three hundred and sixty-seven,Six thousand, five hundred and eighty-two,seventy-three thousand, two hundred and thirty-four,读写规则：个位、十位用 “”连， 百位、十位加 “and”.,How to read a large number?,6,543,431,729,billion,million,thousand,hundred,six billion,five hundred and forty-three million,four hundred and thirty-one thousand,seven hundred and twenty-nine,Thank you.,