请教 og12 86

myungryong

The results of the company’s cost-cutting measures

are evident in its profits, which increased 5 percent

during the first 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
og上说have increased 5 percent 发生在 after falling 之后 但我怎么看也不像
还有 during the first 3 months  不是表示过去的时间 为什么用现在完成时

大家帮帮忙~~

focusspeed

1）介词（after, before, on）+动名词这个结构通常相当于一个时间状语从句。
2）如果两个动作中有一个在另一个开始之前已经完成，则可以用 after+动名词的完成式表示第1个动作；如果只表示先后顺序，则可用after（或before）+动名词结构； on+动名词通常表示两个动作几乎同时发生：
=>After having been instructed to drive out of town, I began to acquire confidence.
=>The man called the police after being robbed.
=>He killed a child before being arrested.
=>On/After being told that her mother was seriously ill, she hurried back to England.

在google 上搜的，觉得有道理，但也不知道到底是不是正确的，还望大牛指点。

gmat928

这里有两个帖子

http://forum.chasedream.com/GMAT_SC/thread-352106-1-1.html?SearchText=24%208

http://forum.chasedream.com/GMAT_SC/thread-366299-1-1.html?SearchText=24%208

windypig123

呵呵，我觉得有时候时态真的很纠结。
加油咯

myungryong

不好意思说错了
during/over the+形容词限定词（first last ,etc,)+一段时间 就是表示现在完成时
B中的时态都错了
如果你说C中的改成after having fallen 用完成时的话，having+done是错误的用法
这里after falling表示时间状语

BTW,可能我的解释有点问题，但是我觉得只要可以找出为啥其他选项错误了就行了。
因为我觉得正确选项有时候也不完美
希望可以帮助你理解

-- by 会员 windypig123 (2010/4/21 17:55:39)

感谢指点 终于明白了 之前和这道题里面的during搞混了
52. To Josephine Baker, Paris was her home long before it
was fashionable to be an expatriate, and she remained
in France during the Second World War as a performer
and an intelligence agent for the Resistance.
(A) To Josephine Baker, Paris was her home long
before it was fashionable to be an expatriate,
(B) For Josephine Baker, long before it was
fashionable to be an expatriate, Paris was
her home,
(C) Josephine Baker made Paris her home long
before to be an expatriate was fashionable,
(D) Long before it was fashionable to be an
expatriate, Josephine Baker made Paris
her home,
(E) Long before it was fashionable being an
expatriate, Paris was home to Josephine Baker,

windypig123

不好意思说错了
during/over the+形容词限定词（first last ,etc,)+一段时间 就是表示现在完成时
B中的时态都错了
如果你说C中的改成after having fallen 用完成时的话，having+done是错误的用法
这里after falling表示时间状语

BTW,可能我的解释有点问题，但是我觉得只要可以找出为啥其他选项错误了就行了。
因为我觉得正确选项有时候也不完美
希望可以帮助你理解

myungryong

Over the last two years 现在完成时的标志

-- by 会员 windypig123 (2010/4/21 16:56:55)

麻烦一下能讲在详细点吗 那前面的during the first 3 months 怎么解释啊

over the last two years 表完成时 那after后面不得用完成时吗

windypig123

Over the last two years 现在完成时的标志

myungryong

为什么没人解答啊~~

myungryong

对啊 ~~

这样能表现出事情的发生前后顺序码？？