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二、基本用法 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girls400-metre relay race. 7.句型：主语＋is ＋about／ over ＝more than／nearly＋具体数词＋metre／kilometre／kilolong ／ 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. | 
