`7` I have my new car serviced by a garade 

`=>` S + has / have + something + Vpp + ( by + O ) 

`8` It is believed that the police man had saved many children from the fire 

`=>` It is believed + that + S + V + O 

`9` Electric lights had been invented before I was born 

`=>` Câu bị động thì quá khứ hoàn thành : 

`-` S + had + been + Vpp + ( by + O ) 

`10`  She wasn't invited to the party 

`=>` Câu bị động thì quá khứ đơn : 

`-` S + was / were + Vpp + ( by + O ) 

`11` Why was the meating postponed ? 

`=>` Câu bị động thì quá khứ đơn : 

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

`12` What time is the letter delivered bye him ? 

`=>` Câu bị động thì hiện tại đơn : 

`-` Wh - question + is / are / am + S + Vpp + ( by + O ) ? 

`13` How was your leg broken ? 

`=>` Câu bị động thì quá khứ đơn : 

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

`14` How is this sume of money spent by you ? 

`=>` Câu bị động thì hiện tại đơn : 

`-` Wh - question + is / are / am + S + Vpp + ( by + O ) ?