初三英语被动语态(改句子）1.We clean the classroom every day2.You mustn`t

1.The classroom is cleaned by us every day
2.The trees mustn`t be planted in every dry earth
3.The stars can“t be seen in the day time
4.A beautiful horse will be drown by John next day
5.Her baby should be taken good take care of by you
6.The dictiongary didn’t be given to me by him yesterday
7.Tom often be helped by him when he is in trouble

For example:
The classroom is cleaned by us everyday.

1.The classroom should be cleaned by us every day.
被动语态：be+done.(被......)