4. Peter finished his assignment two days ago.

⇒His assignment was finished by peter for two ago.

5. The teacher is introducing a new game now.

⇒A new game is being introducing by the teacher now.

6. The Prime Minister is making a speech at the moment.

⇒Making a speech is being making by The Prime Minister at the momnet.

7. Her father was planting different kinds of flowers in the garden

⇒Different kinds of flowers was being planitng by her father in the garden.

8. They have used these machines for five years.

⇒These machines have been used by us for five years.

9. They have just sold that old house.

⇒That old house have just been sold.

10. The teacher will correct exercises next week.

⇒Exercises will be corrected by the teacher next week.

11. You should complete this form in black ink.

⇒This form should completed in black ink.

12. No one can solve that problem.

⇒This problem can't be sloved

Chuyển giúp em về câu bị động với 
4. Peter finished his assignment two days ago.

=> Peter's assignment was finished two days ago.
5. The teacher is introducing a new game now.

=> A new game is being introduced by the teacher now.
6. The Prime Minister is making a speech at the moment.

=> A speech is being made by the Prime Minister at the moment
7. Her father was planting different kinds of flowers in the garden

=> Different kinds of flowers were being planted by her father in the garden
8. They have used these machines for five years.

=> These machines have been used for 5 years
9. They have just sold that old house.

=> That old house has just been sold
10. The teacher will correct exercises next week.

=> Exercises will be corrected by the teacher next week
11. You should complete this form in black ink.

=> This form should be completed in black ink
12. No one can solve that problem.

=> That problem can't be solved