*Hiện tại đơn
+) The flowers are watered by me everyday
⇒ I water the flowers everyday
-) The flowers aren't watered everyday
⇒ I don't water the flowers everyday
?) Are the flowers watered everyday?
⇒ Are you water the flowers everyday?
By whom are the flowers watered everyday?
Me
*Hiện tại Hoàn thành
+) The homework has been done by John
⇒ John has done the homework
-) The homework hasn't been done by John yet
⇒ John hasn't done the homework yet.
?) Has the homework been done yet?
⇒ Has John done the homework yet?
What has been done by John?
The homework
* Quá khứ tiếp diễn
+) Dinner was being cooked by my mother at 4pm yesterday
⇒ My mother was cooking dinner at 4pm yesterday,
-) Dinner was not being cooked by me at 4 pm yesterday
⇒ I was not cooking the dinner at 4pm yesterday
?) Was dinner being cooked at 5 pm yesterday?
Was somebody cooking the dinner at 5 pm yesterday?
What time was dinner being cooked yesterday?
At 4 pm.