L86 Out of control
单词理解
语法理解
过去时
过去时态：
did #仅表述事情、动作发生在过去
如果事情、动作发生在过去，又需要展开细致分类
was doing + did #给出过去具体的时间，没有做完且正在做
had done + did #给出过去的动作或者一个时间点，已经做完了
had been doing + did #给出过去的动作或者一个时间点，一直持续做的一般过去时L3
形式
- 系动词：was/were
- 实义动词：+ed/不规则
功能：过去（短暂动作/状态/反复）
关键词：yesterday / … ago / last …
过去进行时L7
形式：was / were doing
功能：过去某一刻 / 某段时间 正在 / 持续
关键词：过去时刻 / 时段 / 一般过去时
was doing （过程长）+ did（动作短）
- while：只能连接长动作 / 用于对比
- as/when：可以连接短 / 长动作
过去完成时L14
形式：had done + did
功能：过去某一刻/某动作之前完成
关键词：
- after / as soon as
- no sooner … than
- hardly … when
After we had hung the picture on the wall, it fell down.
As soon as we had hung the picture on the wall, it fell down.
We had no sooner hung the picture on the wall than it fell down.
We had hardly hung the picture on the wall when It fell down.
过去完成进行时L62
形式：had been doing + did
功能：过去某一刻 / 某动作之前持续
关键词：过去时间段
课文理解
