第2个回答 2013-09-19
现在发生的用ing,已经发生过了的用ed。你想问的应该不是这个。。。
Followed him for two days, the detectives agreed that he is the murderer.
Following him for two days was the breaking point of this case.
纠结这个用法的时间不如多记几个类似的句子。学习英语语法不是学习美术画人体,有了语法作为骨架就可以生根发芽。你中文是这么学的么?