=>

1. How was the lost man found by the police? ( bị động QKĐ was/were V3/ed)

2. She was declared to have won the competition. ( bị động đặc biệt, ngoài ra bạn có thể dùng cấu trúc It is/was declared that S V...)

3. Has the window of the laboratory been changed? ( bị động HTHT have/has been V3/ed)

4. Peter asked Janet if he could borrow her typewriter./ Peter asked Janet to borrow her typewriter. ( tường thuật/ ask sb to V)

5. My grandmother told/asked me to feed her dog while she was away. (told/asked sb to V)

How did the police find the lost man?

-> How was the lost man found by the police?

Giải thích: Ta thấy câu trên ở thì quá khứ đơn nên công thức viết lại câu là :

Passive: ( Was/ Were ) + S + V3/ed + by O ( Cái này ở dạng câu hỏi nha b =)))

They declared that she had won the competition

-> It was declared that she had won the competition

Cấu trúc của câu này là nâng cao nha b =))

Have they changed the window of the laboratory?

-> Has the window of the laboratory been changed?

Giải thích: Do câu trên ở thì ht hoàn thành nên công thức viết lại câu là :

Passive: (Have/Has) + S + been + V3/ed + by O ( Cái này ở dạng câu hỏi nha b =)))

Can I borrow your typewriter, Janet?" asked Peter

-> Peter asked Janet if he could borrow her typewriter

 Giải thích: Do đây là câu tường thuật Yes/ No questions nên công thức: 

S +asked (+ O) if/ whether S + V

"Feed my dog while I'm away." said my grandmother

-> My grandmother asked me to feed her dog while she was away

Giải thích: Do đây là câu tường thuật câu mệnh lệnh nên công thức: 

S+ asked (+O ) + to V( nguyên mẫu)

:VVVV