1) Thousands of people have to build that castle for him for years
=> That castle have to be built by thousands of people for him for years
2) She has never raed this book before.
=> It is never for her to read this book before/ the first time she has read this book
3) He failed in the examination last year
=> He did not pass the last year examination
4)I haven't eaten this kind of food before
=> This is the first time I have eaten this kind of food
5) His parents made him study for his exam
=> He was made to study for his exam by His parents
6) I don't really want to go to the museum
=> I'd rather go to the museum
7) The fire has destroyed many houses
=> Many houses have been destroyed by the fire
8) May I borrow your pen?
=> Would you mind if I borrowed your pen ?
9) I sarted work for the company a year ago
=> I've been working for the company for a year
10. She didn't say a word as she left the room
=> She left the room without saying a word
P/S : Good Luck
~Best Best~