I saw many boys playing football just now 改为被动语态

I saw many boys playing football just now 改为被动语态 I am watching the boys playing football now.改被动语态 I saw that he was playing football just now.改为同义句 I saw ___ I saw our math teacher go into the office just now.{改为被动语态} I saw my teacher go into the classroom just now.(改为被动语态) 把 I saw the gril run into the room just now 这一句改为被动语态 I saw him playing football on the ground just now 英语高手请进!把下列句子改成被动句:1.I saw Tom playing football just now.2.We We saw some boys playing football怎么改被动 he saw the man enter the building just now.(改为被动语态) I saw the boys( )just now. I watched the boys __(play) football just now . 应该填playing 还