1. They have to repair the engine of the car
=> The engine of the car have to be repaired
2. They boys broke the window and took away some pictures
=> The window was broken and some pictures were broken 
3. People spend a lot of money on advertising every day
=> A lot of money were spent on advertising every day
4. They have provided the victims with food and clothing
=> The victims have been provided with food and clothing
5. Mary is cutting a cake with a sharp knife
=> A cake is being cut by Mary with a sharp knife

Chuyển các câu sau sang bị động:
1. They have to repair the engine of the car
-> The engine of the car have to be repaired
2. They boys broke the window and took away some pictures
-> The window was broken and some pictures were broken 
 

3. People spend a lot of money on advertising every day
-> A lot of money were spent on advertising every day
4. They have provided the victims with food and clothing
->  The victims have been provided with food and clothing
5. Mary is cutting a cake with a sharp knife
-> A cake is being cut by Mary with a sharp knife