2. 一起来总结过去进行时的核心用法吧！
What was she doing at 8: 00 yesterday morning? 昨天早上8点她正在做什么？
They were working on the farm all day yesterday. 昨天他们一整天都在农场干活。
While my mother was cooking dinner, I was doing my homework.
当我妈妈在做晚饭时，我正在做作业。
I was watching TV when the phone rang. 电话铃响的时候，我正在看电视。
考点梳理:
过去进行时表示过去某一时刻或某一段时间内正在进行的动作，能正确写出was/were+动词-ing形式，能识别并运用上述时间点/时间段状语，能区分“持续动作”(过去进行时)与“完成动作”(一般过去时)。
总结: 过去进行时的用法

(续表)

【即学即练】阅读下面短文，用括号内所给动词的适当形式填空。
Yesterday was a busy day for Lisa. At 7: 00 a. m., she (1) (have) breakfast when her best friend, Amy, called. "Let's go to the park after school! " Amy said. Lisa agreed happily. At 8: 30 a. m., Lisa (2) (walk) to school. On the way, she saw a little dog (3) (run) across the street. She stopped to help it, and then she (4) (hurry) to school. When she (5) (get) to the classroom, she found that the teacher had already started the lesson. "I'm sorry, Miss Wang, " Lisa said. "It's okay, but be on time next time, " Miss Wang smiled.
After school, Lisa and Amy went to the park. While they (6) (play) football, it suddenly (7) (rain). They ran to a nearby café and (8) (wait) for the rain to stop. When the rain (9) (stop), they went home happily.

用法总结填空：
① at
② 过去进行时（延续性）
即学即练填空：
(1) was having
(2) was walking
(3) running
(4) hurried
(5) got
(6) were playing
(7) rained
(8) waited
(9) stopped

过去进行时用法总结：
1. 描述过去某一具体时刻正在进行的动作时，标志词为at+具体时间点，还可搭配at that time、then。
2. while用于连接两个过去进行时（延续性）动作，用来表达两个过去动作同时发生。
即学即练解题思路：
1. (1) when引导短暂动作（called为一般过去时），主句表过去正在进行的动作，主语she是第三人称单数，用was having。
2. (2) At 8:30 a.m.是过去具体时刻，体现过去正在进行的动作，主语Lisa是第三人称单数，用was walking。
3. (3) 固定搭配see sb. doing sth.（看见某人正在做某事），填running。
4. (4) and连接并列动作，前面stopped是一般过去时，hurry用过去式hurried。
5. (5) when引导的从句表短暂动作，用一般过去时，get的过去式是got。
6. (6) while引导延续性动作，主语they是复数，用were playing。
7. (7) suddenly体现瞬间动作，用一般过去时，rain的过去式是rained。
8. (8) and连接并列动作，前面ran是一般过去时，wait用过去式waited。
9. (9) when引导短暂动作，用一般过去时，stop的过去式是stopped。