`1` The times newspaper is published in London 

`->` câu BD thì HTD 

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

`2`  His key has been lost by him 

`->` Câu BD thì HTHT 

S + has / have + been + Vpp+ ...

`3` The pyramitds was built by the Egyptian

`->` Câu BD thì QKD

S + was/ were+ Vpp+ ...

II.

`1`  They is destroying the building by fire

`2`They must warn people that there are crocodiles in this lake 

`3` The principal will open the new library 

** Chuyển từ cây  BD => CD 

B1 : Xác định chủ ngữ trong câu thường là ( by + O ) (nếu ko có thì  lấy they / people làm chủ ngữ ) 

B2 : xác đinh thì

B3 : chia động từ theo thì 

B4 :  Viết lại phần phía sau 

I

1. The Times newspaper in London is published.

2. His key has been lost.

3.  The pyramids was built by the Egyptian.

II

1. The fire is destroying the building.

2. We must warn people that there are crocodiles in the lake.

3. The principal will open the new library.