1. The building where he lives is very old.

2. I will tell you something which you didn't know before.

3. I'll never forget the day when I met you

4. Although it was cold, Tom still went swimming

5. John is very sad because he fails the final exam

6. He spends all of his time on looking after the garden

7. They used to start these machine by hand

8. He used to get up late

9. I used to listen to the radio

10. They used to have a dog

11. My brother used to serve in the army

1. The building where he lives is very old. ( mệnh đề quan hệ)

2. I will tell you something which you didn't know before. (mệnh đề quan hệ)

3. I'll never forget the day when I met you ( mệnh đề quan hệ)

4. Although it was cold, Tom still went swimming

5. John is very sad because he fails the final exam

6. He spends all of his time on looking after the garden ( spend + thời gian + VING)

7. They used to start these machine by hand ( used to + V)

8. He used to get up late ( used to + V)

9. I used to listen to the radio( used to + V)

10. They used to have a dog ( used to + V)

11. My brother used to serve in the army ( used to + V)

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