第 4 讲 数词40minutes'walk一、完成句子,每空一词1 . It's _____ ________ ________ (40 分钟的步行路程 ) fromour school to the park.twoorthreetimes2 . Most students watch TV________ ________ ________________ ( 两到三次 ) a week.thetwelfthlesson3 . Today we are going to learn________ ________ ________( 第十二课 ) .inhistwenties4 . He got married ________ ________ ________ ( 在他二十多岁时 ) .Thousandsofpeople5 . ___________ _____ ________ ( 数以千计的人 ) crowdedinto the beach.fifth→fifths去掉 thetwentyth→twentieth二、单句改错1 . Three fifth of the answers are right.____________2 . It is my the first bag.__________3 . Can you show me the twentyth book ? ________________4 . There arethreehundredstreesbehindtheplayground.__________________5 . I have been there one time.______________hundreds→hundredone time→once基数词的构成1 . 1 - 12 是独立单词,必须分别记忆。2 . 13 - 19 是在 3 - 9 后加后缀 -teen 构成。其中要特别注意thirteen, fifteen, eighteen 的变化。3 . 20 - 90 整十的两位数均由 2 - 9 加后缀 -ty 构成。其中要特别注意 twenty, thirty, forty, fifty, eighty 的拼写。4 . 21 - 99 非整十的两位数是由“十位数+个位数”组成,中间用连字符“ -” 连接,即先说“几十”,再说“几”。如:23—twenty-three46—forty-six5 . 101 - 999 的三位数的读法为:先说“几百”,再加 and ,再读后两位数或一位数。如:412—four hundred and twelve206—two hundred and six6 .四位以上的数字要借助科学计数法:先从后面的个位数往前数,每三位加一个逗号“,”,第一个逗号前是 thousand( 千 ) ,第二个逗号前是 million ( 百万 ) ,第三个逗号前是 billion ( 十亿 ) 。读的时候由前往后读。如:2,011—two thousand and eleven4,739—four thousand, seven hundred and thirty-nine8,263,165—eight million, two hundred and sixty-threethousand, one hundred and sixty-five3,000,000—three million注意:英语的基数词中没有单独表示...