Past simple passive: SUB + was/were + V3 + by + person who does action (verb = to build)
The robot was built by the boy.
Past simple passive: SUB + was/were + V3 + by + person who does action (verb = to wear)
The dress was worn by the woman.
Past simple passive: SUB + was/were + V3 + by + person who does action (verb = to read)
The books were read by the boys.