Question

Channge from Past Perfect Active info Past Perfect Passive .
By the time my mom came I had cleaned my room. My room....
By 7 oclock I had done my morning exercises. Morning exercises....
Before we went out the teacher had checked our test. Our test...
He was happy that he had found his watch. His watch...

Answer 1

had been cleaned by me by the time my mom came
had been done by me by 7
had been cheked by teacher before we went out
had  been found by him and he was happy