一、一般过去时
描述过去具体事件
- The movie started at 7 PM last night.(昨晚电影7点开始。)
- We visited the museum on Saturday.(我们上周六参观了博物馆。)
表示过去习惯性动作
- She always wakes up at 6 AM.(她总是早上6点醒来。)
- He smoked two packs of cigarettes a day.(他过去每天抽两包烟。)
二、过去进行时
描述过去某个时间正在进行的动作
- When I called you last night, you were watching TV.(我昨晚给你打电话时,你正在看电视。)
- They were playing soccer in the park at 3 PM.(他们下午3点正在公园踢足球。)
三、过去完成时
表示过去某一时间前已完成的动作
- By the time we arrived, the meeting had already started.(我们到达时,会议已经开始。)
- She finished her homework before dinner.(她晚餐前完成了作业。)
四、特殊过去时
描述过去某个短暂时间点或事件
- The train arrived at 5:15 PM.(火车下午5:15到达。)
- He lost his wallet on the bus.(他在公交车上丢了钱包。)
五、过去分词短语作后置定语
修饰名词表示被动或完成状态
- The broken window needed to be fixed.(破碎的窗户需要修理。)
- The letter written by my friend arrived yesterday.(我朋友写的信昨天到达了。)
注:造句时需注意时间状语的搭配,如yesterday(昨天)、last week(上周)、in 1990(1990年)等。同时,部分动词的过去分词需变形为过去分词形式(如helped→helped, watched→watched)。