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标题: 新托福语法技巧 [打印本页]

作者: serein    时间: 2008-12-9 14:04     标题: 新托福语法技巧

条件句由两部分组成: if从句+主句:


  If it rains I shall stay at home.


  如果下雨我就呆在家里。来源

:考
  If it rains是 if从句, I shall stay at home是主句。条件句有三种,每种所含的一对时态都不一样。每种条件句内还可能有某些变化,但初学条件句者可不必理会这些变化,而把注意力放在条件句的基本形式上。


作者: serein    时间: 2008-12-9 14:04

条件完成时

 

这种时态由would/should+完成式构成:


  肯定式: I would/should have worked
   you would have worked等来源:考
  否定式: I would not/should not have worked等
  疑问式: would/should I have worked?等
  否定疑问式: should I not have/shouldn’t I have worked?
  would you not have/wouldn’t you have worked?


  这种形式用于:


  (a)条件句中。
  (b)would和should的特殊用法中。
  (c)过去时中,相当于将来完成时:
  I hope he will have finished before we get back.
  我希望在我们回来之前他已经做完。
  I hoped he would have finished before we got back.
  我曾经希望在我们回来之前他已经做完。






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