chuyển thành dạng bị động :

22. A committee of experts haven't examined the report yet.
23. They will serve cocktails to the guests about ten minutes from now.
24. His sharp remarks embarrassed everyone last night.
25. Mr Brown introduced Fred to the fellow yesterday.
26. They have already announced the results of the exam.
27. They have sold thousands of CD machines since 1983.
28. A famous composer is conducting the concert tonight.
29. Someone should have discovered that a long time ago.
30. They were demonstrating the new video system when I went there yesterday.

31. I think they should spread a second coat of pain over that surface.
32. Someone might find a solution to the problem soon.
33. They broadcast the victory news over powerful loudspeakers so that the whole town could hear it.
34. Our hosts treated us very kindly last Saturday.
35. As soon as they sign the contract, that company will publish a new textbook next year.
36. They informed me that they had seen you in Oxford Street.
37. We ought to deal with the problem before people talk about it.
38. Eric sat silent in the car, wondering where they were taking him.
39. They looked on Bell as a sweet-tempered young man.
40. The trouble started when they told me to change the way we were running this department.

chuyển sang dạng bị động :

the trouble started when they told mê to change the way we were running this department

chuyển sang dạng bị động :

they built that old red house in the year 1822

chuyển sang dạng bị động :

they speak well of his boyfriend 

chuyển sang dạng bị động :

someone heard him singing to himself well after midnight

chuyển sang dạng bị động :

they didn't admit him into the reception hall because he was wearing jeans

chuyển sang dạng bị động :

she felt that they were concealing something from her

chuyển sang câu bị động :

aren't you afraid  they will sack you if you didn't start coming to work on time ?

chuyển sang dạng bị động :

local people own most of the business in own town now

chuyển sang dạng bị động :

beforethe princess arrived at the shipyard, they have used  police dogs to make sure no one had hidden any bombs there