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什么是数词?基数词sevennumbers从事物内容上分析,基数词用在下列情况。Numbersarewidelyused. Let’scount!Dragon1100 2,000 30,000 400,000 5,000,00060,000,000700,000,000 8,000,000,000 90,000,000,000 100,000,000,000onehundred onethousand tenthousand onehundredthousand onemillion tenmillion onehundredmillion onebillion tenbillion onehundredbillion tens/hundreds/thousands/millionsof ,625 sixhundredandtwenty-five 8,961 eightthousand,ninehundred andsixty-one 95,680 ninety-fivethousand,sixhundred andeighty LookandPractice8Let’sdoapractice!序数词的含义 表示次序的数词叫序数词,是由基数词变化而来的。onetwofour序数词的变化five整十的序数词把y变成i加-ethCanyouread?序数词的定义序数词的构成A:Whenisyourbirthday?WhenisTeacher’sDay?WhenisNationalDay?WhenisIndependenceDay?美国独立日It’s______.基数词变序数词歌 基变序,有规律: 词尾加上th(fourth,sixth) 一、二、三,特殊记; 结尾字母t,d,d(first,second,third); 八减t,九去e(eighth,ninth); ve要用f替(fifth,twelfth); ty将y变i; th前面有个e。 若是碰到几十几, 前用基来后用序。tenthordinal numbers一、二、三,特殊记, 加th从4起, 八少“t”,九去“e”, “ve”要用“f”替,(five,twelve) 见“y”变成“i”和“e”,词尾加上“th”, (twenty,thirty,---ninety) 若是遇到几十几,只变个位就可以。Canyouwritetheirordinalnumbers?Decemberisthe________monthoftheyear. Mondayisthe_______dayoftheweek. Englishisspokenbymostpeopleastheir_______ languageintheUSA,GreatBritain,Australian, andCanada. TheGamesofthe_____________Olympicin2008 willbeheldinthecityofBeijing. I’mhungry.I’veeatenthreeapples.Wouldyou pleasegivemea_______one? Atthebeginningofthe_____________centurythe world’spopulationhaspassed6billion. Hegotoffthisbusandgotona______one.序数词的用法1)序数词1━19除第一,第二,第三,第五,第八,第九,第十二变化不规则外,其余均在基数词后加上-th。 2)十位整数的序数词的构成方法是,是将十位整数基数词的词尾-y变成i再加-eth。3)几十几的序数词,只是把个位数变成序数词,十位数不变。一、二、三特别记,其余后加“th”, five,twelve两兄弟,“f”要将“ve”替, “八”减“t”,“九”去“e”,辅音+“y”改“ie”, “21”以后个位变序。 first第一second第二third第三fourth第四fifth第五sixth第六 seventh第七eighth第八ninth第九tenth第十eleventh第十一twelfth第十二thirteenth第十三 nineteenth第十九twentieth第二十fortieth第四十fifty-first第五十一eight-third第八十三 ninety-fourth第九十四January一月

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