35.My father bought me a video recorder

-> A video recorder was bough by my father

36.The police didn’t interview the witness

-> The witness wasn't interview by the police

37. He hasn’t seen the younger son for three weeks

->the younger son hasn’t been seen for three weeks

40.The scientists are carrying out an important experiment

->an important experiment is being carried out by the scientists

38.People say that his father is French

->his father is said to be French. I’ll have the fence removed

39.I’ll have someone remove the fence

->The fence have remove done by someone

Ghi nhớ

bị động của cấu trúc have sb do sth là have sth done by sb 

Câu bị đông thì quá khứ đơn

S+WAS/WERE+P2

THÌ HTHT 

S+HAVE/HAS+BEEN+P2

THÌ TLĐ

S+WILL+BE+P2

Ta có cấu trúc:

O+was/were+V(PII)+...+(by S)

Ta có:

1. My father bought me a video recorder. 
=> A video recorder was bought by my father.

2. The police did not interview the witness.
=> The witness was done not interview by the police. 

3. He hasn't seen the younger son for three weeks.
=> The younger son hasn't been seen for three weeks.

4. People visit French every Summer.

=> French is visited every Summer.

5. They learn English all over the world.

=> English is learnt all over the world.

$#FromTha$