$\text{20.}$ We used to be bidden talk in class by our teacher.
$\text{→}$ Câu bị động với Modal V: S + Modal V + be + Ved/ P2 + (by)
$\text{21.}$ A wide range of cars are produced by Japan.
$\text{→}$ Câu bị động thì HTD: S + is/ are/ am + Ved/ P2 + (by)
$\text{22.}$ A large hole was being digged in the garden by workers.
$\text{→}$ Câu bị động thì QKTD: S + was/ were + being + Ved/ P2 + (by)
$\text{23.}$ A woman was knocked down in the street by the car.
$\text{→}$ Câu bị động thì QKD: S + was/ were + Ved/ P2 + (by)
$\text{24.}$ Grass on the meadow was being eaten by cows.
$\text{25.}$ You will be met at the station by my cousin.
$\text{→}$ Câu bị động thì TLD: S + will be + Ved/ P2 + (by)
$\text{26.}$ Her own company is being ran by her.
$\text{→}$ Câu bị động thì HTTD: S + is/ are/ am + being + Ved/ P2 + (by)
$\text{27.}$ Umbrellas must be left in the classroom by visitors.
$\text{28.}$ We used to be made to clean the house by my mother.
$\text{→}$ be made to-V: bị bắt làm gì
$\text{29.}$ John's homework hasn't been finished by him.
$\text{→}$ Câu bị động thì HTHT: S + has/ have + Ved/ P2 + (by)
$\text{30.}$ Their ___ had been revised before they took exams.
$\text{→}$ Câu bị động thì QKHT: S + had been + Ved/ P2 + (by)