1. Mr. Tuan is delivering this mail at present
-> This mail is being delivered by Mr tuan at present
2. She has taken my bag
-> My bag has been taken by her
3. Lightning struck the house
-> The house was struck by lightning
4. They built a new house in my village last year
-> A new house was built in my village by them last year

1. Mr. Tuan is delivering this mail at present
-> This mail is being delivered by Mr. Tuan at present
2. She has taken my bag
-> My bag has been taken
3. Lightning struck the house
-> The house was stuck by lightning
4. They built a new house in my village last year
-> A new house was built in my village last year

1.  This mail is being delivered by Mr Tuan  at present.
2. My bag has been taken .
3. The house was stuck by  lightning.g