OG12—86，为什么用现在完成时？？

huangsiyan

86. The results of the company’s cost-cutting measures are evident in its profi ts, which increased 5 percent during the fi rst 3 months of this year after it fell over the last two years.

(A) which increased 5 percent during the first 3 months of this year after it fell
(B) which had increased 5 percent during the first 3 months of this year after it had fallen
(C) which have increased 5 percent during the first 3 months of this year after falling
(D) with a 5 percent increase during the first 3 months of this year after falling
(E) with a 5 percent increase during the first 3 months of this year after having fallen

答案是C
这题唯一不明白的就是：为什么使用的时态是现在完成时？？

sunflower88

我觉得是在after 后面的原因。

huangsiyan

划线部分是用来证明前文的证据，所以是到说话时已经发生了的。说话时用的是一般现在时，所以划线部分用现在 ...
michael_wind 发表于 2011-3-22 20:37

    谢谢~~这个完成时明白了~
那后面的这个falling是因为伴随还是仅仅因为这个动词跟在了after后面了才要使用ing的形式？

huangsiyan

falling和后面那一坨做伴随状语~
jingjane222 发表于 2011-3-23 06:49

    这个falling是因为跟在after后面还是因为伴随？
确定是因为伴随么~

huangsiyan

during the first 3 months表示一个大段的时间，所以要用完成时。
since，大段时间，ever since——这三个 ...
gabriel_djh 发表于 2011-3-23 19:45

    这个我记得好像是XDF的笔记~
上面说有四种状况下使用完成时
这你说的就概括3种了~难道还有一种是根据逻辑意思来判断？

gabriel_djh

during the first 3 months表示一个大段的时间，所以要用完成时。
since，大段时间，ever since——这三个标志是用来表示完成时的

jingjane222

falling和后面那一坨做伴随状语~

liyucmh

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michael_wind

划线部分是用来证明前文的证据，所以是到说话时已经发生了的。说话时用的是一般现在时，所以划线部分用现在完成时。时间标志：during