1. has been used (for 2 years: Bị động HTHT: have/has + been + p.p)

2. was discovered (một hành động đã xảy ra và chấm dứt: Bị động QKĐ: was/were + p.p)

3. has widened (since 1999: HTHT)

4. was finished (in 1973: Bị động QKĐ)

5.  is situated (chỉ sự thật: Bị động HTĐ: am/is/are + p.p)

6. was built (many years ago: QKĐ)

7. were visited (last week: QKĐ; mình nghĩ cái này dạng chủ động mới đúng "visited" vì chủ ngữ là người nhưng mà cứ theo đề mà làm BĐ)

8. was completed (in 1937: QKĐ)

9. was formed 

10. was opened

`II`.

1. The weel was invited thousand of years ago (people được lược bỏ trong câu BĐ, bị động QKĐ)

2. These flowers are watered by my father every morning (Bị động HTĐ)

3. Computers are used all over the world (Bị động HTĐ)

`1` has been used 

`2` was discovered 

`3` has been widened

`4`  was finished 

`5`  was sistuted

`6`  was built 

`7`  were visited 

`8`  was completed 

`9` was formed 

`10`  was opened 

II.

`1` The Wheel was invited thousands of years 

-> Câu bị động thì quá khứ đơn

S + was / were + Vpp+ O 

-> Câu bị động thì hiện tại hoàn thành :

S + has / have + been + Vpp+ O 

`2` These flowers are watered every morning .

`3`  Computers are used all over the world 

-> Câu bị động thì hiện tại đơn : 

S + is / are / am + Vpp+ O .

@ Dorris