有一道有关while和when的英语题- -
7个回答

亲,我感觉,这是一个错句.正确的表达是:

One protestor said that the government could have done something to stop the spread of the demonstration BEFORE they took effictive steps.

理由:这是虚拟语气,改写成非虚拟语气句,就是:

The government DIDN'T DO anything to stop the spread of the demonstration before / when they did take effictive steps.