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七年级英语语法:数词的基本用法

来源:101教育网整理 2014-10-16 字体大小: 分享到:

  (一)基数词的基本用法

  1.定语

  Fifty thousand London dockers are out on strike.

  2.主语

  数词作主语,谓语动词用单数。

  如: Two months is quite a long time.

  Five is an odd number.

  3.宾语或介词宾语

  How many do you want? -----Eight, please.

  The city has a population of four million.

  4.表语

  We are altogether fourteen.

  Five plus seven is twelve.

  5.同位语

  What work are you to assign us three?

  Is there room for us two?

  6.基数词+单数名词+形容词构成合成形容词。如:一个五岁的男孩a five-year-old boy;一座800米长的桥an 800-metre-long bridge;女子400米接力girls"400-metre relay race。

  7.句型:主语+is +about(大约)/ over =more than(超过)/nearly(接近)+具体数词+metre(s)/kilometre(s)/kilo(s)long / high /tall /deep /away等。如:长江长6300公里。

  The Changjiang River is 6,300 kilometres long.

  8.表示“。。。。。。十”的数词的复数形式可以用来表示人的岁数或年代:

  He is in his early thirties.

  He died still in his forties.

  This took place in the 1930s.



  (二)序数词的基本用法

  1.序数词主要用作定语,前面一般要加定冠词(或物主代词):

  Tom is their second son.

  They celebrated the 10th anniversary of the founding of the republic.

  I will never give up, not even on the 1,000th or 10,000th try.

  2.有时前面可以加一个不定冠词来表示“再一”, “又一”这样的意思:

  We’ll have to do it a second time.

  Shall I ask him a third time?

  When I sat down, a fourth man rose to speak.

  3.First,second 等有时可用来表示“第一个人(批)”“第二个人”等:

  She was among the first to come and settle in Dujiashan.

  You will be the second to speak.

  4.如果数字较长,序数词总避免使用,而且读的方法也常常简化:

  第201房间: Room 201

  第319面: page 319

  第一拖拉机厂:the Number I Tractor Works

  第六号车厢:Carriage No.6

  南京路1490号:1490 Nanjing Road

  电话号码55――2347:telephone number : 55—2347

  5. 在谈编了号的东西时,我们可以用基数词表示顺序:

  the first part------part one

  the third squad------squad three

  the twenty-third section----section twenty-three

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