数词讲解和练习.doc

数词 1.基数词 构成方法 举例 （1）1-12的基数词是独立的，需牢记 1 (one), 2(two), 3 (three), 4(four), 5(five), 6(six), 7(seven), 8(eight), 9(nine), 10(ten), 11(eleven), 12(twelve) （2)13-19的基数词以-teen结尾 13(thirteen), 15(fifteen), 18(eighteen) (3) 20-29的整十数以-ty结尾 20(twenty), 30(thirty), 40(forty), 50(fifty) (4)十位数与个位数之间要加连字符“-” 53(fifty-three), 76(seventy-six) (5)百位和十位（若无十位则和个位）之间加and 892（eight hundred and ninety-two) (6) hundred（百），thousand（千），million（百万），billion（十亿）等前面有具体数词时，不能在他们的后面加 “s”,但这几个数字单位与of连用时，要用复数形式。 800（eight hunderd), 3,000 (three thousand), hundreds of 成百上千， thousands of成千上万， millions of数百万计 (7)四位数以上的数要用科学计数法，从后往前数，每三位数加 “s”,第二个逗号为百万（million），第三个逗号为十亿（billion）。 3,999（three thousand nine hundred and ninety-nine) 注意：英语中没有表示“万”的单词，要用“几十个千”来表示万，“几百个千”来表示几十万，如：10,000（ten thousand),30万（three hundred thousand)。 Excercise: I’m 13 years old and my sister is 15 years old. So my sister is _______ years older than me. A. one B. two C. three D. four Every year, ______ people go to visit their factory. A. a thousand of B.thousands C. thousand of D.thousands of You can see _______ if you go out at night. A. million stars B. thousand of stars C. hundreds stars D. millions of stars I’d like ____ bowl of noodles. One is for myself and the other two are for my parents. A. one B. two C. three D. four Each of us has to write a __________ report every two weeks. two-hundred-word B. two-hundreds-word C. two-hundreds-words D. two-hundred-words 2. 序数词 基数词变序数词规律 举例 （1）一二三，特殊记 one-first, two-second, three-third 八加h,九去e,ve要用f替,以y结尾变ie， 后跟th莫忘记 eight-eighth, nine-ninth, five-fifth, twelve-twelfth, twenty-twentieth, thirty-thirtieth, forty-fortieth （3）若是遇到几十几，只变个位就可以 twenty-six twenty-sixth, fifty-one fifty-first （4）其他情况 six-sixth, eighteen-eighteenth, hundred-hundredth Excercise: Mum, I got _______place in the English Speech Competition.] __________ ! That’s really good news, dear! the fist