Ví dụ về câu bị động:
*Hiện tại đơn
+) The flowers are watered by me everyday
-) The flowers aren't watered everyday
?) Are the flowers watered everyday?
By whom are the flowers watered everyday?
*Hiện tại Hoàn thành
+) The homework has been done by John
-) The homework hasn't been done by John yet
?) Has the homework been done yet?
What has been done by John?
* Quá khứ tiếp diễn
+) Dinner was being cooked by my mother at 4pm yesterday
-) Dinner was not being cooked by me at 4 pm yesterday
?) Was dinner being cooked at 5 pm yesterday?
What time was dinner being cooked yesterday?