`1.` Some apples are eaten by Duy today.  

`2.` An essay is being written in the classroom by Duong.  

`3.` English is spoken in class by Long and Hoang every day.  

`4.` English is being taught in the classroom by the teacher at this time.  

`5.` A cup of coffee is drunk by Huy every night. 

`6.` The flowers in the garden are being watered by Nhung at the moment.  

`7.` Many souvenirs are bought in the supermarket by the students.  

`8.` Some English songs are being sung by the girls at present.  

`9.` Many stamps are collected by the boys today. 

`-` Bị động thì HTĐ (+) S + am/is/are + V3/ed + (by O)   (câu `1,3,5,7,9)`

`-` Bị động thì HTTD (+) S + am/is/are + being + V3/ed + (by O)  (câu `2,4,6,8`)

`-` Trạng từ chỉ nơi chốn đứng trước "by O"

`-` Trạng từ chỉ thời gian đứng sau "by O"

`-` Với các chủ ngữ chủ động là " I, he, she, we, they" thì khi chuyển sang câu bị động, có thể lược bỏ phần "by O"

`-` Với các chủ ngữ chủ động là " People, no one, some one,no body, ... " thì viết lại với câu bị động, phải lược bỏ phần "by O" 

`1.` Some apples are eaten by Duy today 

`-` HTĐ : S + am/is/are + P2 by O

`2.` An essay is being written in the classroom by Duong 

`-` HTTD : S + am/is/are + being P2 by O

`3.` English is spoken in class by Long and Hoang every day

`-` HTĐ : S + am/is/are + P2 by O

`4.` English is being taught in the classroom by the teacher at this time

`-` HTTD : S + am/is/are + being P2 by O

`5.` A cup of coffee is drunk by Huy every night.

`-` HTĐ : S + am/is/are + P2 by O

`6.` The flowers in the garden are being watered by Nhung at the moment

`-` HTTD : S + am/is/are + being P2 by O

`7.` Many souvenirs are bought in the supermarket by the students.

`-` HTĐ : S + am/is/are + P2 by O

`8.` Some English songs are being sung by the girls at present. 

`-` HTTD : S + am/is/are + being P2 by O

`9.` Many stamps are collected by the boys today. 

`-` HTĐ : S + am/is/are + P2 by O

`@` Kiến thức :

`-` Dấu hiệu thì HTĐ : every morning, every afternoon,every day , often , always , usually

`-` Dấu hiệu thì HTTD : now , look! , at the present ,........