Ex 1: Chuyển sang câu bị động: 

1. People spend a lot of money on advertising every day.

2. Marry is cutting the cake with a sharp knife.

3. The police haven’t found the murderer yet.

4. They sold one of her paintings at $1,000.

5. Tom was writing two poems.

6. After class, one of the students always erases the chalk board.

7. She often takes her dog for a walk.

8. Nobody has ever treated me with such kindness.

9.My father bought this house two years ago 

10.We have done these exercises carefully.

Ex 2: Chia động từ về thì thích hợp :

1.Everyday, my sister usually (clean) ____________________ the floor.

2.When he came, I (watch) ________________ TV.

3. Jane and I (finish) _______________ school in 1987.

4.I’m busy at the moment. I (work)____________________ on the computer.

5. When I was a child, I (play) _________________ the violin.

6.He (play) ___________________ for the national team so far.

7. We often (have) ______________ bread for breakfast.

8. We (not finish) __________________ homework yet.

9. John (live) __________________in the city for 20 years ago.

10. We (know) _____________________ each other since we were small.

11. After they (have) _______ their breakfast, they went shopping yesterday.

12. They (go) ______________ to the supermarket yesterday.