III. Transformation
(Simple past vs Past perfect)
1. Alex phoned the police. He saw the accident.
→ As soon as ..........................................................................................................................
2. The police arrived so late, so the robbers escaped.
→ By the time ........................................................................................................................
3. I turned off the lights. After that I left the room.
→ Before ..................................................................................................................................
4. Everyone went home and afterwards this message arrived.
→ After ......................................................................................................................................
5. Michael worked as a physicist after graduating from the university.
→ After ......................................................................................................................................
6. He left school and then joined the army.
→ After ......................................................................................................................................
7. Mary finished her homework and then went to bed.
→ Before ..................................................................................................................................
(Áp dụng những thì khác)
8. The frying fan caught on fire. I was making dinner at that time.
→ While ....................................................................................................................................
10. The flood raced down the valley and destroyed everything on its path
→ When ....................................................................................................................................
9. I talked to Laura. This made me feel less nervous.
→ Since .....................................................................................................................................
11. Ms. Johnson will return your call. She’ll have some free time.
→ As soon as ..........................................................................................................................
12. Susan sometimes feels nervous. She chews her nails.
→ Whenever ...........................................................................................................................
