`1.->` Coffee was drunk yesterday

Câu bị động thì QKĐ : S(O) + was/were+P2+(by Os)

`2.->` These map have just been drawn 

Câu bị động thì HTHT : S(O) + have / has + been + P2+ (by Os)

 He drank coffee yesterday.

⇒ Coffee was drunk yesterday.

- Chuyển sang câu bị động thì QKĐ : ( Dấu hiệu : yesterday, drank )

   Act :  S + V(ed/2) + O

   Pas : S + was/were + V(ed/3) .... + ( By + O )

She has just drawn these map.

⇒ These map have just been drawn.

- Chuyển sang câu bị động thì HTHT : 

   Act : S + have/has + V(ed/3) + O

   Pas : S + have/ has + been + V(ed/3)... + ( By + O )

** Lưu ý : 

  + S đc thành lập từ O