把它们改成被动语态

题目

把它们改成被动语态
1.He is cleaning the classroom
2.They have finished their homework
3.I can mend his bike
4.She will buy ten books tomorrow
5.We shouldn't allow them to go out with their friends
6.The old man often make us lough

答案

1.The classroom is cleaned by him.2.Their homework have been finished by them.3.His bike can be mended by me.4.Ten books will be bought by her tomorrow.5.They shouldn't be allowed to go out with their...