2. 外语
  3. Many things have happened ______ I saw you.

Many things have happened ______ I saw you.

admin2010-02-05  24
问题 Many things have happened ______ I saw you.
选项 A、when
B、before
C、since
D、for
答案C
解析 本题考点为since“自从……从……以来”，该词常用来引导一个时间点或引导一个从句，用从句时，一般为过去时，其主句为完成时或现在完成进行时，例如：She hasn’t been home since her marriage. He has been living in Canada since 1990, Nobody has heard of him since he left home in 1995. It is just a week since we arrived here. (如果主句表示的只是时间，则可用一般现在时)。A)when当……时，不能与本句的主句中的完成时态搭配使用。例如：When I was studying in Peking University,  I attended many famous professors’ lectures, When he was a child, he was ill -treated by his step-mother。 B)before在……之前，如果此句用before引导，主句应该用过去完成时。例如：He had finished all homework before he turned on the TV. He told me that he had been to China before he came to the United States. D)for表示时间时，不能引导一般过去时。例如：That’s enough for the present, he has waited here for several hours.
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