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Step 2 Presentation
1. S: I was …. When Mr. Yuan came in.
Rule: 用When引导时间状语从句，两个动作可以先后发生，也可以同时进行. (表示正在进行时，用延续性动词)
2.While I was talking,you were listening.While I was talking, someone walked by.
Rule: 用While引导时间状语从句，两个动作同时进行. (表示正在进行时，用延续性动词)
While I was talking, someone walked by.
I was talking when someone walked by.
3.As I was trying to find my way out, I suddenly heard some noise above me.
T: As的同时进行主要表示动作发生的背景或条件，意思为“随着……”；“一边……，一边”
动作先后——when动作同时——when, while and as
正在进行的动作必须用进行时
Step 3 Practice
1. Complete the exercises on page 98.
2. Make sentences with ‘while’, “when” and “as”.
3. Make a dialogue with your partner.
Step 4 Consolidation.
A. Fill in the blanks with the proper tense of the given verb.
1. Millie ___________(look) for a video about earthquakes when Simon ____ (see) her in the library yesterday.
2. When I got home last night, Mum ________ (watch) TV.
3. What _________ you _________ (do) at 9:00 p.m. last night?
B. Fill in the blanks with a proper conjunction when, while or as.
1. ______Simon arrived, Amy was reading.
2. I was reading English ______ the teacher came in.
3. _____my mother was cooking, the phone rang.
4. Mrs. Wang was listening to music _______ her husband was reading newspapers.
Step 5: Homework
＊To remember how to use the past continuous tense correctly.
＊Make a summary to what we learned today.