2017年公共英语考试二级语法精选讲解(6)
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过去完成时典型例题 The students ___ busily when Miss Brown went to get a book she ___ in the office. A. had written, left B. were writing, has left C. had written, had left D. were writing, had left 答案D. "把书忘在办公室"发生在"去取书"这一过去的动作之前，因此"忘了书"这一动作发生在过去的过去，用过去完成时。句中when表示的是时间的一点，表示在"同学们正忙于……"这一背景下，when所引导的动作发生。因此前一句应用过去进行时。 注意： had no … when 还没等…… 就…… had no sooner… than 刚…… 就…… He had no sooner bought the car than he sold it. 相关资料 |
