1、The dog is chasing the cat、-> The cat is being chased by the dog.
2、She was singing a song、-> A song was being sung by her.
3、He ate the apple、-> The apple was eaten by him.
4、The teacher is teaching the students、-> The students are being taught by the teacher.
5、They are playing football、-> Football is being played by them.
6、The baby is sleeping in the crib、-> The crib is where the baby is sleeping.
7、The house was built in the early 1800s、-> The early 1800s is when the house was built.
8、I need to go grocery shopping、-> Grocery shopping is what I need to do.
9、She painted a beautiful picture、-> A beautiful picture was painted by her.
10、He will clean the kitchen、-> The kitchen will be cleaned by him.
