把下面几个句子改为被动语态在线等谢谢~Wedon’toftenspeakEnglishathome.Theydidn’tcookmealsyesterday.Weshouldobeytherulesinourschool.ThegirlsoftensingEnglishsongsafterclass.Theycanmakethiskindofmachine

Question

把下面几个句子改为被动语态在线等谢谢~
We don’t often speak English at home.
They didn’t cook meals yesterday.
We should obey the rules in our school.
The girls often sing English songs after class.
They can make this kind of machine in the fatory.The old man built a new house in front of the mountain.
Did you leave your key on the desk?
He will finish his new book next month.
They didn’t held the sports meeting because of the heavy rain.
They need 20 desks.
Must we clean the room?

Answer 1

We don’t often speak English at home.
English isn't often spoken by us at home.
They didn’t cook meals yesterday.
Meals weren't cooked by them yesterday.
We should obey the rules in our school.
The rules should be obeyed by us in our school.
The girls often sing English songs after class.
English songs are often sung by the girls after class.
They can make this kind of machine in the fatory.
This kind of machine can be made by them in the factory.
The old man built a new house in front of the mountain.
A new house was built by the old man in front of the mountain.
Did you leave your key on the desk?
Was your key left on the desk?
He will finish his new book next month.
His new book will be finished next month.
They didn’t held the sports meeting because of the heavy rain.
The sports meeting wasn't held by them because of the heavy rain.
They need 20 desks.
20 desks are needed by them.
Must we clean the room?
Must the room be cleaned by us?