Who gave them a music lesson yesterday?改为被动-Who was a music lesson given to them yesterday the music lesson was given to them by whom?BY whom they was given a music lesson?哪个对
问题描述：
Who gave them a music lesson yesterday?改为被动-Who was a music lesson given to them yesterday
the music lesson was given to them by whom?BY whom they was given a music lesson?哪个对
答
the music lesson was given to them by whom?这个是对的
答
BY whom they was given a music lesson?这个正确．．．．以疑问代词开头的疑问句转换成被动句时要注意词序：应将主动句中的疑问代词改为介词by的宾语,但仍然放在句子开头.例如：Who has broken the cup?→ By whom ...