1.He isn't teaching me English now
->I am not being taught English now.
2.Did you drink a sup of tea yesterday
->Was a sup of tea drunk yesterday?
3.Does he sing a song every day?
->Is a song sung everyday?
4. No one cuts the flowers in the park
->The flowers aren't cut in the park.
5. I don't read comic in the library
->Comic isn't read in the library.
6.No body is writing letters on the paper
->Letters aren't being written on the paper.
7.Is your brother cleaning the rooms at present
->Are the rooms being cleaned by your brother at present?
8.I don't write her an email everyday
->She isn't written an email everyday.
9.He ate cakes at home yesterday
->Cakes were eaten at home yesterday.
10.She didn't look after them in the hospital
->They weren't looked after in the hospital.