1. Mike's father designed this house
⇒This house was designed by Mike's father
2.they are building a new school in my village
⇒A new school is being built in my village
3.Someone has warned us not to go out alone.
⇒We have been warned not to go out alone
4.to day, people grow coffee in 50 different countries
⇒Today, coffee is grown in 50 different countries
5.my students are studying english
⇒ English is being studied by students
6.tom has just bought a dictionary
⇒A dictionary has just been bought by Tom