将下列句子改为被动语态

1, A recorder is often used in our English class.

1 A recorder is often used in our English class.
2 A new film will be showed by them next week.
3 When was the house built by them?
4 The boy was seen to enter the room.
5 All the texts should be learnt by the students by heart.

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1 A recorder is often used in our English class.
2 A new film will be shown next week.
3 When was the house be built?
4 The boy is seen to enter the room.
5 All the texts should be learnt by heart.

A recorder often are used by us 后边直接一写