9.Isn’t that amazing!　 　

8. I followed to see where it was going.　

7.You can image how strange it was.　

6.I was walking down the street when a UFO landed right in front of me.　

5.当妈妈正在做饭时，我在看电视。While my mother was cooking ,I was watching TV.　

4.当不明飞行物着陆时，你正在干啥？What were you doing when the UFO landed?　

3.While sth./sb. was doing sth., I was doing sth.... 　

2.How about... / What about...?　

1.I was doing sth. When+一般过去时的时间状语从句...　 　

36. for the first time　 第一次　

本单元目标句型:　

　What were you doing when I arrived/at that time/at 　8:00　 last night/from 　9:00　 to 　10:00　 yesterday?