标题: OG13一题时态求解。你是否有一样的疑惑？ [打印本页] 作者: zhanlinhan 时间: 2013-12-6 17:04 标题: OG13一题时态求解。你是否有一样的疑惑？ 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 fi rst
3 months of this year after it fell
(B) which had increased 5 percent during the fi rst
3 months of this year after it had fallen
(C) which have increased 5 percent during the fi rst
3 months of this year after falling
(D) with a 5 percent increase during the fi rst
3 months of this year after falling
(E) with a 5 percent increase during the fi rst
3 months of this year after having fallen
正选：C
为什么OG13里面的解释说为了区分increase和falling的发生时间，要用现在时呢？ 我觉得after已经很好地区分了二者的发生时间啊。好比A选项，如果把it fell 换成falling应该是对的。但是A的解释里面执意说要改成完成时，这下理解不了了。再者，during the first 3 months of this year应该是过去的时间段，怎么还可以用现在完成时？ 求解，求解。谢谢。 作者: lindberghya 时间: 2013-12-25 15:10
小白白来试试~
首先类，during就是要搭配完成时态的吧，所以是ok的
（类似的还有since搭配现在完成，until recently搭配did）
其次类，这句话在写的时候有两种可能，
1. 写这句话的时候正好是the first 3 months of this year结束的时候，这里主句谓语是are，所以用have done就完全合理了
2. 写这句话的时候the first 3 months 已经是过去的事情了，那么就要用had done了。（而且用had done必须要有可以和done的内容在逻辑上有时间顺序的did出现才行，在这个句子中，用了had done，那么后面就不是after而要用before了）