一、规则动词过去式变化

一般过去时

- was/were + 过去分词（be动词变形）

- The cat was sleeping when I called.（我叫它时猫正在睡觉）

- 动词加-ed（规则动词）

- She played the piano yesterday.（她昨天弹了钢琴）

过去完成时

- had + 过去分词（be动词变形）

- By the time we arrived, the movie had started.（我们到达时电影已开始）

- 具体结构：过去分词+助动词had

- He had finished his homework before dinner.（他晚饭前就完成了作业）

二、不规则动词过去式

常见不规则动词变形

- go → went

- We went to the beach last summer.（我们去年夏天去了海滩）

- eat → ate

- The cake tasted delicious.（蛋糕尝起来很美味）

- take → took

- They took a lot of photos on vacation.（他们假期拍了很多照片）

三、时间状语与过去式搭配

明确时间点

- yesterday（昨天）

- I watched a movie yesterday.（我昨天看了一部电影）

- last week/month/year（上周/上个月/去年）

- The weather was cold last winter.（去年冬天天气很冷）

- just now（刚刚）

- The letter arrived just now.（信刚刚到）

相对时间表述

- before/after（之前/之后）

- I finished my homework before dinner.（我晚饭前完成了作业）

- the moment（一……就……）

- The moment the alarm rang, she got up.（闹钟一响她就起床了）

四、综合运用示例

The children playedsoccer in the park last afternoon.（孩子们昨天下午在公园踢足球）

By the time we reached the station, the train had already left.（我们到达车站时火车已离开）

建议结合时间状语和动词变形进行造句，注意不规则动词的特殊变化规则。可通过替换不同时间状语进一步练习，例如将"yesterday"改为"this morning"等。