2009年考研英语时态及语法复习指导

　　四、完成进行时指动作在完成时的基础上还要继续下去

　　The company has been promising a rise in salary for ages, but nothing has happened.

　　The school board listened quietly as John read the demand that his followers had been demonstrating for.

　　时态、语态答题思路：

　　（1）先根据选项的区别点确定考题要点为时态，然后回到题句中寻找给出的或暗示的时间状语，缩小选择范围，进而选出正确答案；

　　（2）根据谓语动词与句子主语或非谓语动词与其逻辑主语的关系，确定句子是主动语态还是被动语态。