1, he needn't repair the bike
-> the bike needn't to be repaired
2, people think he was an artist
-> he is thought to have been an aritist
3, it's impossible to rebuild the school
-> the school is impossible to be rebuilt.
4, he let me come in
-> I am let come in
5, people sáid she was very intelligent
-> he is said to have been very itelligent
6, he doesn't need to paint the house
-> the house isn't need to be painted
7, they don't use the room very often
-> the room isn't used very often
8, tom used to borrow my pen
-> my pen used to be borrowed by tom
9, he had to finish his work on time
-> his work had to be finished on time