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数词基数词序数词onetwothreefourfivesixseveneightnineteneleventwelve1.13-19后缀-teen2.20-90后缀-ty3.几十几连字符“-”如26twenty-six4.百hundred千thousand百万million十亿billion5.成百上千hundredsof…成千上万thousandsof成百万上亿millionsof请用1分钟的时间默写出三十—百万的单词！onetwothreefourfivesixseveneightnineteneleventwelvethirteenfourteenfifteensixteenseventeeneighteennineteentwentythirtyfortyfiftysixtyseventyeightyninetyhundredthousandmillion１.直接表达法６：３０sixthirty２.间接表达法分＋过＋时fivepastsix6:05分＋差＋时fivetosix5:55一刻:quarter半小时half1961nineteensixty-onenineteenhundredandsixtyone7:358:079:451:153:301984199919351787五岁Iamfivetearsold.我五岁了。五岁的Lilyisafive-year-oldgirl.Lily是一个五岁的女孩。请用英语说出下面的数字！九百九十九一千八百五十七三百五十万序数词的构成！基数词+th一，二，三，特殊记。八去t，九减e，ve要用f替，见y变成i和e。词尾加上th若是碰到几十几，只变个位就可以。特殊情况one---firsttwo----secondthree----third基数词几十几变成序数词时，表示几十的数词不变，只把个位的变成序数词！第二十一第二百四十五.第九百九十九序数词的缩略形式由阿拉伯数字加序数词的最后两个字母构成。first-----1stsecond-----2ndthird------3rd序数词前要加the或者my,your,等物主代词Exercise!