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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
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