+We water the flowers every day. (active)=The flowers are watered every day(passive)?Do we water the flowers every day?=Are the flowers watered every day?-We don't water the flowers every day.=The flowers aren't watered every day.+A teacher is asking a pupil(active)=A pupil is being asked (by a teacher)(passive)?Is a teacher asking a pupil?=Is a pupil being asked by a teacher?-A teacher isn't asking a pupil.=A pupil isn't being asked by a teacher.+They built the house (active)=The house was built(passive)-They didn't build the house.=The house wasn't built.?Did they built the house?=Was the house built?