1. what your mother was doing when the electricity went off.
2. While I was doing my homework, my parents did not allow me to watch TV.
3. Patrick was waiting for the taxi when he met his teacher.
4. Mr. John's rabbit escaped as he was cleaning its cage.
5. When the clown appeared the audience was laughing.
6. Yesterday evening, when my sister and I were watching TV, somebody knocked. the door.
7. The girl was walking to school when we saw the accident
8. As I was putting on my slippers, our Japanese coach started
9. All the students were chatting when the teacher came in
10. My bro was riding his bike when he fell

1. did your mother do, went
2. was doing, did not allow
3. was waiting, met
4. escaped, cleaned
5. appeared, laughed
6. were watching, knocked
7. was walking, saw
8. put, started
9. was chatting, came
10. was riding, fell

1. did your mother do......went off
2. i was doing, didn't allow
3. was waiting...met
4.escaped...was cleaning
5.appeared...laughed
6. were watching...knocked
7. was walking....saw
8. was putting...started
9. were chatting came
10. was riding...fell
6.