Present Simple: Is this book translated by two students?
Present Continuous: Is this book being translated by two students?
Present Perfect: Has this book been translated by two students?
Past Simple: Was this book translated by two students?
Past Continuous: Was this book being translated by two students?
Past Perfect: Had this book been translated by two students?
Future Simple: Will this book be translated by two students?
Future Continuous: см. Future Simple.
Future Perfect: Will this book has been translated by two students?
Все Perfect Continuous автоматически переходят в Perfect. (т.е. нет времени Perfect Continuous)