$\text{5.}$ This building has been built for many years . 

$\text{->Câu bị động thì Hiện Tại Hoàn Thành : S+has/have + been + Vpp + ( by O )  }$

$\text{6a.}$This chair can be repaired quickly by him .

$\text{-> Câu bị động của modal verbs : S+ modal verbs + be + Vpp + ( by O ) }$

$\text{6b.}$  This homework  has to be done ( by me ) .

$\text{-> Câu bị động của have to : S+ has/have to + be +Vpp + ( by O ) }$

$\text{6c.}$ Hue is going to be visited by Lan tomorrow .

$\text{-> Câu bị động của thì Tương Lai Gần : S+is/am/are+going to + be + Vpp + ( by O ) }$

$\text{6d.}$Hue will be visited by me tomorrow . 

$\text{-> Câu bị động thì Tương Lai Đơn : S+will be + Vpp + ( by O ) }$

`5.` This building has been built for many years

S + have/ has + been + PP+ (by O)

`6a.` This chair can be repaired quickly by him

S + can + be + PP+ (by O)

`6b.` Hue is going to be visited by Lan tomorrow

S + is/ am/ are + going to + be + PP + (by O)

`6d.` Hue will be visited by me tomorrow

S + will be + PP + (by O)