Câu bị động ( Thì HTĐ `-` QKĐ `-` QKHT `-` TLĐ `-` ĐTKT ) :

`-` Thì HTĐ : S + be + V3 / PII ( by O )

`-` Thì QKĐ : S + was / were + V3 / PII ( by O )

`-` Thì QKHT : S + had + been + V3 / PII ( by O )

`-` Thì TLĐ : S + will be + V3 / PII ( by O )

`-` ĐTKT : S + ĐTKT + be + V3 / PII ( by O )

`2`.If a party was thrown by Tom , I would refuse his invitation

`3`.If the exercises had been corrected by the teacher , the students wouldn't have made many mistakes

`4`.If Mary didn't accept his proposal , his house might be sold

`5`.This car won't be bought if it doesn't appear any new features

`6`.John sells his house because it is haunted by ghosts

`\text{@ TheFox}`