Hộ với Chuyển sang câu bị động . 1.Tom has seen this film before.. 2.Nina has read the newspaper already.. 3.The have seen these movied yet... 4.I have signed the contract... 5.These men hav e bought the tickkers 6.Out teachers hav explained the English grammar... 7.The student hav e discussed the pollution problem since lasr week... 8.have the thieves stolen the lost valuable painting in the national museum.... 9Have you finished the above sentences... 10. Lan gas cleaned thiss room ..... 11.Thế haven't done their homework.... 12.Lan gas serb thừa film these times.....

1. This film has been seen before.

2. The newspaper has been read already.

3. These movies have been seen yet.

4. The contract has been signed.

5. The tickets have been bought by these men.

6. The English grammar has been explained by our teachers.

7. The pollution has been discussed since last week.

8. Has the lost valuable painting be stolen in the national museum ?

9. Have the above sentences been finished ?

10. This room has been cleaned by Lan.

11. Their homework have been done.

12. This film has been seen three times by Lan.

1. This film has been seen before

2. The newspaper has been read already

3. These movies have been seen yet

4. The contract has been signed

5. The tickets have been bought by these men

6. The English grammar has been explained by our teachers

7. The pollution has been discussed since last week 

8. Has the lost valuable painting be stolen in the national museum?

9. Have the above sentences been finished ?

10. This room has been cleaned by Lan

11. Their homework have been done by them

12. This film has been seen three times by Lan