=>
2/
1. came/had finished
2. had lived/moved
3. woke/had already been
4. got/had worked
5. had picked/went 
6. told/had served
7. went
8. was/had performed
9. admitted/had broken
10. had you done/came
11. felt/had not prepared
12. Did Peter come/had finished
13. had prepared/invited
14. bought/had traveled
15. saw/stormed

3/

1. Before Peter went to university, he had taken a gap year.

2. Where had you been before you came home?

3. There had been many trees along the street before people cut them down.

4. Jim had been very upset before Mary cheered him up.

5. She told me yesterday that she had not finished her assignment yet.

Bài 2: Cho dạng đúng của từ trong ngoặc ở thì quá khứ hoàn thành hoặc quá khứ đơn.

1. came/finished

2. had lived/moved

3. woke/had already been

4. got/had worked

5. picked/went

6. told/served

7. went

8. was/had performed

9. admitted/had broken

10. had you done/came

11. felt/hadn't

12. Did Peter come/finished

13. had prepared/invited

14. bought/had travelled

15. saw/stormed

Bài 3: Dựa vào các từ cho sẵn, viết câu hoàn chỉnh.

1. Before Peter went to university, he had taken a gap year.

2. Where had you been before you came home?

3. There had been many trees along the street before people cut them down.

4. Jim had been very upset before Mary cheered him up.

5. She told me yesterday that he hadn't finished her assignment yet.