Đáp án:
Were you taught how to apply this theory by your teacher?
=>Did your teacher teach you how to apply this theory?
Câu bị động ở dạng quá khứ
Did(not) + S + V_bare_ + o?
=> Was/Were(not) + S + V_ptII_ + by + O?
Dont let the dog be teased by the children.
Câu bị động với câu mệnh lệnh
+ Chủ động: Don't + S + V + O
=> Let + O + be + V_ptII_
=>Don't let the children tease the dog
What have been done to help the poor in this city?
Câu bị động ở thì HTHT
+ Chủ động: Question words + have/ has + S + V_ptII_ + O?
=> Question words + have/ has + S + been V_ptII_ + by O?
=>What have we done to help the poor in this city ?
Where did the treasure use to be hidden by pirates in the old time?
Câu bị động ở thì Qúa khứ
+ Chủ động : Question words + did + S + V_bare_ + O?
=> Question words + was/were + S + V_ptII_ + O?
=> Where did pirates use to hide the treasure in the old time?
