九年级英语句型转换 改为被动语态 很简单的..............

51.We often sing this song.
2.He broke his leg in the match.
3.She will sell her house soon.
4.He is repairing the machine

This song often sang by us.
His leg was broken in the match.
Her house will be sold by herself soon.
The machine is repiared by him.
His work was finished by him.

1.trees must be planted every year by us. 2.will the loor be swept by mary ? 3.the dishes is going to be washed by mary. 4. his room has been cleaned by tom 5.the piano is being played by a friend ~~~~~~~~~~~~~~~~~~~~~祝你进步，有疑问可追问，请及时采纳~~~~~~~~~~~~~~~~~~~~~