Change from active into passive. 1.by the time my mom came i had cleaned my room. my 2.by 7 o'clock i had done my morning exercises. morning 3.before we went out the teacher had checked our test. our 4.he was happy that he had found his watch. his

My room had been cleaned by me by the time my mum came.
My morning exercises had been done by me by 7 o'clock.
Our test had been checked by our teacher before we went out.
His watch had been found by him.