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2018绵阳南山自主招生复习英语(6)

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发表于 2018-5-9 11:42:03 | 显示全部楼层 |阅读模式
六、数词
    ()基数词  在英语中表示数目的词称为基数词。
    1.基数词的构成
    (1)1-20
    onetwothreefourfivesixseveneightnineteneleventwelvethirteenfourteenfifteen
  sixteenseventeeneighteennineteentwenty
    (2)21-99 先说几十,再说,中间加连字符。
    23→twenty-three34→thirty-four45→forty—five56→fifty-six67→sixty-seven78→seventy-eight89→eighty-nine91→ninety-one
    (3)101—999先说几百,再加and,再加末两位数或末位数;
    586→five hundred and eighty-six803→eight hundred and three
    (4)l,000以上,先从右往左数,每三位数加一个,第一个前为thousand.第二个前为
  million,第三个前为billion(美式)thousand ,million(英式),然后一节一节地表示。
    1001→one thousand andone
    9,785→nine thousand  seven hundred andeighty-five
    18,423→eighteen thousandfour hundred and twenty-three
    6,260,309→six million two hundred and sixtythousand three hundred and nine
    750,000,000,000→seven  hundred and fifty, billion(美式) seven hundred and fifty thousand million(英式)
    2.基数词的用法
    (1)作主语
    egFour Of them comefrom Paris
    (2)作宾语
    eg.一 How many books wouldyou like?
        I would like two
    (3)作表语
    egSeven minus two isfive
    (4)作定语
    There are three people in my family·
    (5)作同位语
    You two will go swimming with us
    (6)表具体数字时,hundredthousandmillion用单数。
    There are six hundred students in our grade
    (7)表不确定的数字时,数词用复数。若带名词,再加of hundreds of(数百,成百上千的)thousands of(数干,成千上万的)millions of(数百万)
    They arrived in two sand threes.他们三三两两地来了。
    (8)表示“…的数词的复数可以表示人的岁数或年代。
   He isin his early thirties.他有三十来岁(31—34)
    This took place in the 1930s.这事发生在二十世纪三十年代;
    (9)表示时刻
    I watch CCTV News at seven o’clock everyevening.
    ()序数词  在英语中表示顺序、次序的词称为序数词。
    1.序数词的构成
    (1)一般在基数词后加th
    four→fourththirteen→thirteenth
    (2)不规则变化
    one→firsttwo→secondthree→thirdfive→fiftheight→eighthnine→ninthtwelve--~twelfih
    (3)y结尾的十位整数,变yie再加th
    twenty→twentieth  forty→fortieth  ninety→ninetieth
    (4)从二十一后的几十几直至几百几十几几千几百几十几只将个位的基数词变为序数词。
    twenty-firsttwo hundred andforty-fifth
    2.序数词的用法
    (1)序数词作定语时,一般要与定冠词或物主代词连用。
    egTom is their secondson
    He is the first one to come here
    (2)序数词有时可与不定冠词连用,表示数量上"—"再一
  eg: He tried a second time.他又试了.
    Shall l ask him a third time?还要我再问他次吗?我已问了他两次)
    3)序数词的缩写形式为:阿拉伯数字加上这个词的末尾两个字母。
    1st 2nd3rd4th20th21st22nd23rd
    (4表示年、月、日时,年用基数词,日用序数词。
    2005815日:()1582005=15thAugust2005()8152005=August 15th2005
    ()基数词和序数词都可以用来给数字编号。
    No1(1)No3bus(3路公共汽车)Room 103(103号旁间)
    The first lesson=Lesson Two(第二课)
    ()分数词的表达
    分子用基数词,分母用序数词,分子大于1时,分母加s
    eg13-one third25-two fifths
    ()数学运算的表达
    eg3+5=8    Three plusand five is eight
    9-2=7   Nine minus two is seven
    6x5=30 Five times six is thirty six unutilized fiveis thirty
    8÷2=4   Eight divided by two is four


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