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高中二年级英语

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    __小题1:___ People use money to buy food, furniture, books, bicycles and hundreds of other things they need or want. When they work, they usually get paid in money.
    Most of the money today is made of metal or paper.___小题2:___ One of the first kinds of money was shells.
    Shells were not the only things used as money.In China, cloth and knives were used. In the Philippine Islands, rice was used as money for a long time.Elephant tusks, monkey tails and salt were used as money in parts of Africa.
    The first metal coins were made in China.They were round and had a square hole in the centre. ___小题3:____
    Different countries have used different metals and designs for their money.___小题4:___ Sweden and Russia used copper (铜) to make their money. Later some countries began to make coins of gold and silver.
    But even gold and silver were inconvenient if you had to buy something expensive. Again the Chinese thought of a way to improve money.____小题5:_____The first paper money looked more like a note from one person to another than the paper money used today.
    Money has had an interesting history from the days of shell money until today.
    A.The first coins in England were made of tin (锡).
    B.But people used to use all kinds of things as money.
    C.No one knows for certain when people began to use money.
    D.People strung (串连) them together and carried them from place to place.
    E. Money, as we know, is all made of paper.
    F. They began to use paper money.
    G. Today anyone will accept money in exchange for goods and services.

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序数词

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  • 序数词

序数词的概念:

表示顺序的数称为序数词。如:first, second, third, fourth。


序数词的构成与用法

1、序数词的构成:
①一般来说,是由相应的基数词加词尾th构成。
   例:four+th→fourth
           six+th→sixth
           seven+th→seventh
           ten+th→tenth
②下面这些基数词在变为序数词时,有特殊的变化。
例:one→first
        two→second
        three→third
        five→fifth
        eight→eighth
        nine→ninth
        twelve→twelfth
③十位整数序数词的构成方法是将基数词的词y变成i,然后再加eth。
例:twenty→twentieth
        thirty→thirtieth
        forty→fortieth
        ninety→ninetieth
④两位或两位以上的基数词变成序数词时,仅将个位数变成序数词。
例:twenty-one→twenty-first
        thirty-five→thirty-fifth
        a hundred and fifty-three→a hundred and fifty-third

2、序数词的用法:
①序数词在使用时,一般加上定冠词。
例:the first book
        the second floor
        the third day
        the fourth week.
②序数词在多数情况下都用作定语,有的也可以作表语、主语和宾语。
例:The may1st is Labour Day. 五月一日是劳动节。
        My room is on the second floor. 我的房间在二楼。
        The first is larger than the secon.(主语)第一个比第二个大。
        Read the book from the first.(宾语)从开头读这本书。
        You'll be the sixth to write.(表语)你将是第六个写的。
③序数词的前面可以加上不定冠词,用来表示“再一”,“又一”的意思。
例:You may have a third try. 你可以第三次尝试。


序数词知识体系:

 


约数的表达方法

用tens/dozens/scores/hundreds/thousands/millions of 表示“几十、几百、上千、成千上万”等。
如:The boy bought dozens of pencils.            
        Thousands of people died in the earthquake.
注意: (A):dozen, score, hundred, thousand, million等表示确切数量时,不用复数。
如:five dozen (of) eggs   五打鸡蛋
        hree hundred people  三百个人

分数词的构成和用法:

1)分数词构成法:
分数词(FractionalNumerals)由基数词和序数词构成,基数词代表分子,序数词代表分母。除了分子为1的情况下,序数词都要用复数形式:
如:1/4:one-fourth
        5/9:five-ninths
        2/3:two-thirds
       17/5:three and two-fifths
       7/12:seven-twelfths
       379/8:forty-seven and three-eighths
此外还有下面表示法:
如:1/2:a(one) half
        1/4:a(one) quarter
        3/4:three-quarters
        9/4:two and a quarter
        3/2:one and half
        31/4:seven and three quarters


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