你好,在出现时间状语:last year,yesterday,the day before yesterday,several days ago,last week...等词的时候,动词就用过去式. 补充下:还有一种情况就是被动语态,那个叫过去分词:比如:I was told to be quiet in class.或者:I was asked to help him out. eg: I am prepared to face my fate 这句是做形容词,不是被动了也不是过去式了,prepared是形容词的.手工回答,辛苦耕耘,盼望采纳. 再问: 有点肤浅详细点 再答: 你看补充,不是肤浅,是给你重点而已。