`6` How were the keys found in such a dark and messy room ? 

`->` Câu bị động thì quá khứ đơn 

Wh - question + Was / were + S + Vpp+ ( by + O ) ?

`7`  Have the air - conditioner been turned off ?

`->` Câu bị động thì hiện tại hoàn thành

Have / Has + S + been + Vpp+ ( by + O ) ?

`8`  When will the required assignment be handed in ( by you )  ? 

`->` Câu bị động thì tương lai đơn

Wh - questions + will + S + be+ Vpp + ( by + O ) ?

`9`  Should a complaint letter be sent to the mayor by me? 

`->` Câu bị động với should

Should + S + be + Vpp+ ( by + O ) ?

`10`  Had any conclusions been come  before we come ? 

`-> ` Câu bị động thì quá khứ hoàn thành 

Had + S + been + Vpp+ ( by+ O ) ?

@ Nấm lùn 🍄

6.how were the keys found in suck a dark and messy room?

7.has the ari conditioner been turned off?

8.when will the required assignment be handed in?

9.should a complaint letter be sended to the mayor?

10.had any conclusions been come before we came?