11. He likes people to call him “Sir”.

=> He likes being called "Sir".

12.They are going to have someone repair their car

=> Their car are going to be repaired.

13.People say that he is intelligent.

=> He is said to be intelligent.

14.He can’t repair my bike.

=> My bike can't be repaired by him.

15.Mary has operated Tom since 10 o’clock.

=> Tom has been operated by Mary since 10 o'clock.

16.Mr. Smith has taught us French for 2 years.

=> We have been taught French by Mr.Smith for 2 years.

17.They didn’t look after the children properly.

=> The children weren't looked after properly.

18.Nobody swept this street last week.

=> This street wasn't swept last week.

19.How many lessons are you going to learn next month?

=> How many lessons are going to be learned next mon