1.My teacher used to give me many exercises.
-> I used to be given many exercises by my teacher.
2.Nobody can give a better solution to this problem.
-> A better solution can not be given to this problem.
1.My teacher used to give me manymany exercises
=> I was given manymany exercises by my teacher
2.Nobody can give me a better solution to this problem
=> I can't be given a better solution to this problem