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主语从句不可位于句首的五种情况

素衣 2016-06-02 10:18
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(1) if 引导的主语从句不可居于复合句句首。
  It is uncertain if he will leave for Beijing tomorrow.
  if可以引导主语从句,但必须放置句尾。
(2) It is said , (reported) …结构中的主语从句不可提前。
例如:
  It is said that President Jingo will visit our school next week.
(3) It happens…, It occurs… 结构中的主语从句不可提前。
例如:
  It occurred to him that he failed in the examination.
(4) It doesn’t matter how/whether …结构中的主语从句不可提前。
例如:
  It doesn’t matter whether he is wrong or not.
(5) 含主语从句的复合句是疑问句时,主语从句不可提前。
例如:
  Is it likely that it will rain in the evening?
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