把下列句子改写为被动语态
问题描述：
把下列句子改写为被动语态
1.You must play attention to your Spelling when you write your homework.
2.He has finished his homework.
3.He had hung his coat on the wall before his wife came into the room.
答
1.Attention should be paid to your spelling when you write your homework.2.His homework has been fineshed.3.Him coat had been hung on the wall before his wife came into the room.