一、表示过去某个具体时间发生的动作
时间状语为具体时间点 Yesterday, she suddenly fell ill.（她昨天突然病倒了）
Last Monday, we didn't have classes.（上周一我们没上课）
At 8 o'clock last night, the meeting started.（昨晚8点会议开始）
时间状语为过去时间段
Last summer, we visited an old castle.（去年夏天我们参观了一座古堡）
When I was in the countryside, I often walked by the riverside.（我在乡下时经常在河边散步）
二、表示过去习惯性或经常发生的动作
频次副词+一般过去时
I went to the cinema once a week when I was at school.（我上学时每周去看一场电影）
They always finished their homework on time.（他们总是按时完成作业）
过去习惯性动作
She smoked a cigarette every day before she quit.（她戒烟前每天抽一根烟）
三、一般过去时的特殊句型
一般疑问句
Did she call you last night？（她昨晚给你打电话了吗？）
Did they finish the project on time？（他们按时完成项目了吗？）
否定句
He wasn't at home when the phone rang.（电话响时他不在家）
We didn't eat dinner at 7 pm yesterday.（我们昨天7点没吃晚饭）
条件句（虚拟语气）
If I had known you were coming, I would have baked a cake.（如果我知道你要来，我就烤蛋糕了）
四、典型动词过去式变化
| 动词原形 | 过去式 | 过去分词 |
|----------|--------|----------|
| be | was/were | been |
| help | helped | helped |
| play | played | played |
| go| went | gone | | eat
五、注意事项
时间状语： 常与yesterday, last week, in 1999等连用，也可与this morning, last year等现阶段时间状语连用。 否定与疑问句
习惯性动作：可用would+动词原形（如would call）或used to+动词原形（如used to smoke）。
通过以上分类和例句，可系统掌握一般过去时的用法。