教学情境分析题

根据题目要求完成下列任务，用中文作答。

下面是某初中教师在教授了“过去进行时”这一语法内容之后设计的练习活动。
Activity 1
T: Hi, what were you doing at 8 p.m. yesterday?
SI: I was doing my homework.
T: Good. Ask the student behind you the same question.
SI: What were you doing at 8 p.m. yesterday?
S2: I was watching TV. What were you doing at 8 p.m. yesterday?
S3: I was cleaning my room. What were you doing at 8 p.m. yesterday? 
...

Activity 2
T: Now let's see who has the best memory. I was cooking at 6 o'clock yesterday evening. What about you?
SI: I was having dinner.
T: Tell your partner like this: Ms. Zhang was cooking at 6 clock yesterday evening. I was having dinner.
SI: Ms. Zhang was cooking at 6 o'clock yesterday evening. I was having dinner.
S2: Ms. Zhang was cooking at 6 o'clock yesterday evening. S1 was having dinner. I was doing some shopping.
S3: ...
根据上面的信息，从下面三个方面作答：