1. Was the servant bringing tea?
B. Was tea being brought by the servant?
2. I was writing an essay.
A. An essay was being written by me.
3. She looks after the child.
D. The child is looked after by her.
4. He could not lift the box.
A. The box could not be lifted by him.
5. She had cooked some dishes.
D. Some dishes had been cooked by her.