楼主，你好，很高心为你解答：1. I was told by Mother not to be late.2. He was made to work 12 hours a day by them.3. He was heard singing in his room by us just now.希望对你有帮助，望采纳，谢谢...
被动语态是把原来句子动词后面的宾语变为主语I was told not to be late by mother .He was made to work 12 hours a day by them.（是They made him...吧）He was heard to sing by us in his room just now....
