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2012年托福考试语法辅导:their等物主代词

中华考试网   2012-01-03   【
their等物主代词
  1.物主代词是常见的名词限定词, 其后既可接可数名词的单复数(his pen, his pens)又可接不可数名词(his time), 但不可与其他的限定词同时出现(部分数词除外), 例如:不能说no my car, my no car,但是可以说 My two red cars
  2.英语中许多习惯用法在表示特指时都用物主代词而不用the, 为的是更突出所属关系,这在TOEFL中是一个常考的点
例如:Manufacutrers of consumer goods often change the styles of their products.
这里用their 而不用 the
  例题:
  (1)
  A good exercise program helps teach people to avoid the habits that might shorten the lives.
  应改为: their
  解释: 定冠词the指代不清, 用物主代词their作名词lives的限定语更符合英语习惯, 还可突出lives 与people之间的所属关系
  (2)
  A liquid is similar to a gas because has molecules are not fixed to each other in any specific way.
  应改为: its
  解释: has是动词, 不能修饰名词, 且与从句的谓语冲突, 依句意改为物主代词its作molecules的限定语
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