`11.` This factory wasn't built by the German during the Second World War.

- Cấu trúc: S + V_ed + O

              → S + was/ were + V3 (+ by Sb/O)

`12.` This house and these cars are going to be painted for Christmas Day by the Green.

- Cấu trúc: S + is/ am/ are going to + V inf + O

              → S + is/ am/ are going to BE + V inf (by O)

`13.` The cats had been fed before Ann went to the cinema.

- Cấu trúc: S + had + V3 + O

              → S + had + been + V3 (+ by Sb/O)

`14.` The pollution problems have been discussed by the students since last week.

- Cấu trúc: S + have/has + V3 + O

              → S + have/has + been + V3 (+ by Sb/ O)

`15.` Has the most valuable painting in the national museum been stolen by the thieves? 

- Cấu trúc: S + have/has + V3 + O

              → S + have/has + been + V3 (+ by Sb/ O)

`16.` The new president will be interviewed on TV.

- Cấu trúc: S + will V + O

              → S + will be + V3 (+ by Sb/O)

`17.` How many languages are spoken in Canada? 

- Câu trúc: S + V + O

              → S + be + V3 (+ by Sb/O)

`18.` Are those shoes going to be repaired?

- Cấu trúc: S + is/ am/ are going to + V inf + O

              → S + is/ am/ are going to BE + V inf (by O)

`19.` His nose has been broken in a football match. 

- Cấu trúc: S + have/has + V3 + O

              → S + have/has + been + V3 (+ by Sb/ O)

`20.` Have the above sentences been finished by you? 

- Câu trúc: S + have/has + V3 + O

              → S + have/has + been + V3 (+ by Sb/ O)