改成被动语态1.the shop sells clothes for women2.we have already cleaned the desk3.how will you post a letter to america4.did he make Mary unhappy5.do the farmers usually grow rice there6.shall I teach him English7.what must we do to save the boy's life

1. Clothes for women were sold in the shop

2. The desk has already cleaned (by us)

3. How will a letter be posted to America?

4. Was marry made unhappy by him?

5. Is rice usually grown there by the farmers?

6. Can he be taught English by me?

7. What must be done to save the boy's life?

第三个之后的句子完全没有必要改被动，改成被动了显得很做作，很不自然，改的话也是为了改而改。

【英语专业八级，欢迎追问】

1. The  clothes  for women are sold in the shop.

2. The desk has been cleaned (by us).

3. How will a letter be posted to America?

4. Was Mary made inhapppy (by him)?

5. Is the rice usually grown there (by farmers)?

6. Will he be taught English( be me)?

7. What must be done to save the boy's life?

1、The shop sells clothes for women.Are clothes sold for women by the shop?2、We have already cleaned the desk.The desk has already been cleaned by us.3、How will you post a letter to America?How will...

clothes for women are sold by the shop.
the desk has already been cleaned by us.
How will a letter sent to America by you?
was Marry made unhappy by him.
Is rice usually be grown by farmers there
Shall he be taught English by me
What must be done by us to save the boy's life

希望对你有帮助

楼上的貌似第一题回答的有点问题