1. have seen-> had seen 

- Hành động xảy ra trước chia QKHT, hành động xảy ra sau chia QKĐ. 

2. worked-> had worked 

- Dịch nghĩa câu: Rõ ràng là Tom đã làm việc rất chăm chỉ vì khi tôi gặp anh ấy, anh ấy đã rất mệt mỏi-> had worked

3. what is life like-> what will life be like 

Câu điều kiện loại 1: If+S+am/is/are/V (s/es)..., S+will/can/may/should/..... V 

4. won't launch-> won't be lauched 

Chiếc phi thuyền sẽ không thể tự thực hiện hành động "phóng lên" -> bị động 

5. was arriving-> arrived 

1. I have seen the film before, so I knew how it ended.

->have seen->had seen

2. It was obvious that Bill worked hard because he was very tired when I saw him.

->worked=>had worked

3. If technology continues to advance so quickly, what is life like in hundred years?

->what is life like=>what will life be like

4. The spaceship won't launch until they have done a final check.

->won't launch=>won't be launched

5. When the bus was arriving, we missed it because we were busy talking.

->was arriving=>arrived