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《Appendix II_The Past Progressive Tense》课堂教学教案教学设计（新世纪版）
例句：I was watching TV at eight o’clock yesterday. 昨天八点钟我在看电视。
He was writing a letter at nine o’clock yesterday. 昨天九点钟他在写信。
记住：如果没有过去的时间状语，我们要通过另一动作的对比，把过去进行时体现出来
eg：He said Uncle Wang was mending the radio for you.
I was doing my homework when someone knocked at the door.
4.例句分析：
He said he was trying to draw a plane on the blackboard at that time.
他说在那个时候他正在试图在黑板上画一架飞机。
He was helping his father on the farm the whole afternoon last Saturday.
周六的整个下午他一直在田地里帮助他的爸爸。
I was cooking a meal, when you rang me.
当你给我打电话时，我正在做饭。
5.例句解析：
She was selling（sell）potatoes when I saw her.
I was cooking（cook）supper at 5 yesterday.
They were playing（play）football when I passed.
6.过去进行时否定句变法：be后加not
1. She was playing football at five yesterday afternoon.
She wasn’t playing football at five yesterday afternoon.
2. They were reading newspapers in the room this time yesterday.
They weren’t reading newspapers in the room this time yesterday.
7.过去进行时一般疑问句的变法及肯定、否定回答：
1. She was doing her homework at five yesterday afternoon.
Was she doing her homework at five yesterday afternoon?
Yes, she was. No, she wasn’t.