GMAT语法中after所起的作用

很多考生都知道由于GMAT语法贯穿各个考试部分，因此对于考生的基础知识要求就比较高。今天南京朗阁GMAT名师和大家分享的是GMAT语法中after所起的作用。

after doing 相关问题

220. (GWD-24-8, OG12-86)The results of the company's cost-cuttingmeasures are evident in its profits, which increased five percent during thefirst three months of this year after it fell over the last two years.

A. whichincreased five percent during the first three months of this year after it fell

B. whichhad increased five percent during the first three months of this year after ithad fallen

C. whichhave increased five percent during the first three months of this year afterfalling

D. with a five percent increase during the firstthree months of this year after falling (C)

E. with a five percent increase during the firstthree months of this year after having fallen

答案选C，

下面是语GMAT语法笔记上对于B和C的解释：

B. after it had fallen时态上没有问题，可以与over the last two years搭配，但是不如after falling简洁

C. Correct;afterfalling简洁，状语从句的省略

朗阁知识小贴士：

状语从句的省略：从句主语和主句主语一致，并且包含be。。。从句主语和be可以省略。when，although ，等词引导时间状语从句，让步状语从句等时，可以用这种形式来简洁表达。

但是如果把这里的after doing 理解为 after it have/had been falling。我觉得也不能清晰的表达出原文所想表达的时态先后关系。而且如果这里 fall是进行时表达一直在下降，这里也是不对的吧。

after doing 作状语，表达其修饰的动作之前发生的动作，其修饰的动词和after后面的动词动作发出者要一致。如此表达最能体现出二者的先后关系。

The best way to extract the flavor from saffron threads is to soak them in liquid after pounding

them 。。。这里pounding作状语，修饰的是soak。 虽然整句话都没有出现pound的动作发出者，但soak和pound二者逻辑上的动作发出者一致。

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