1. 将下句改为被动语态：
Parents should encourage teenagers to do social work for their community.
应该是：
Teenagers should be encouraged to do social work for their community by their parents.
还是：
Teenagers should be encouraged by their parents to do social work for their community.
什么正确？
另外，to do social work for their community 在主动语态中应该是宾语补足语吧，那样宾补和by引导的方法状语在被动语态中应该什么放在前面呢？
2. 将下句改为被动语态：
Can Lucy do her homework tomorrow instead?
应该是：
Can Lucys homework be done tomorrow instead by Lucy ?
还是：
Can Lucys homework be done by Lucy tomorrow instead ?
另外，tomorrow instead 是时间状语吗？应放在by Lucy的后面吗？
求老师解答，谢谢！
1. 将下句改为被动语态：
Parents should encourage teenagers to do social work for their community.
应该是：Teenagers should be encouraged to do social work for their community by their parents.
还是：
Teenagers should be encouraged by their parents to do social work for their community.
什么正确？
另外，to do social work for their community 在主动语态中应该是宾语补足语吧，那样宾补和by引导的方法状语在被动语态中应该什么放在前面呢？
2. 将下句改为被动语态：
Can Lucy do her homework tomorrow instead?
应该是：
Can Lucys homework be done tomorrow instead by Lucy ?
还是：
Can Lucys homework be done by Lucy tomorrow instead ?
另外，tomorrow instead 是时间状语吗？应放在by Lucy的后面吗？
求老师解答，谢谢！
by +动作实行者，是方法状语，地址状语，时间状语，主语补足语，其地方排列顺序为
主语补足语----方法状语-----地址状语------时间状语
