Поставьте следующие предложения в passive: 1)by the beginning of the year we will have already changed our apartment for a better one.2)by the end of the month we'll have already left this office.3)by the week-end they will have already finished a translation of this book.
1 Our apartment will have already been changed for a better one by the beginning of the year.
2 This office will have already been left by us by the end of the month.
3 A translation of this book will have already been finished by them by the weekend.