Активный залог: He walked his dog yesterday evening.
Пассивный залог: His dog was walked by him yesterday evening.
Активный залог: The professor checks student's papers after every test.
Пассивный залог: Student's papers are checked by the professor after every test.
Активный залог: Jane wrote the letter to her granny yesterday.
Пассивный залог: The letter was written by Jane to her granny yesterday.
Активный залог: People drink tea in many countries.
Пассивный залог: Tea is drunk in many countries by people.
Активный залог: In Canada many people speak French.
Пассивный залог: French is spoken in Canada by many people.