语法大问题,麻烦如果有高手看到了,

问题描述:

语法大问题,麻烦如果有高手看到了,
请先看清楚我要求的什么!
When (study) different cultures and societies,anthropologists often (focus on) marriage as (a) contractual agreement between (different parties.)
题目为4选出一个错的,我直接告诉你,是study错了,study--->studying,麻烦打酱油的人别瞎捣乱了,
我只是不明白为什么是studying,还有,何为时间状语从句的省略结构?
还有!别TM没事给我复制一大段没用的百度百科.
1个回答 分类:英语 2014-11-02

问题解答:

我来补答
anthropologists是studying的逻辑主语.如果要用study,就要改成When anthropologists study different cultures and societies.
这里显略了它的主语,而study与逻辑主语之间是主动关系,所以用studying.
如果study与逻辑主语是被动关系,就要用studied.
 
 
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